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Taxifolin, also known as dihydroquercetin, possesses several interesting biological properties. The purpose of the study was to identify polymorphs of taxifolin prepared using crystallization in different solvents. Data from X-ray powder diffraction, differential scanning calorimetry, and thermogravimetry enabled us to detect six different crystalline phases for taxifolin. Besides the already known fully hydrated phase, one partially hydrated phase, one monohydrated phase, two anhydrous polymorphs, and one probably solvated phase were obtained. The unit cell parameters were defined for three of them, while one anhydrous polymorph was fully structurally characterized by X-ray powder diffraction data. Scanning electron microscopy and hot stage microscopy were also employed to characterize the crystallized taxifolin powders. The hydrate and anhydrous forms showed remarkable stability in drastic storage conditions, and their solubility was deeply evaluated. The anhydrous form converted into the hydrate form during the equilibrium solubility study and taxifolin equilibrium solubility was about 1.2 mg/mL. The hydrate taxifolin intrinsic dissolution rate was 56.4 μg cm−2 min−1. Using Wood’s apparatus, it was not possible to determine the intrinsic dissolution rate of anhydrous taxifolin that is expected to solubilize more rapidly than the hydrate form. In view of its high stability, its use can be hypothesized.
Fernanda Cristina Stenger Moura; Nicola Pinna; Riccardo Vivani; Gisele Elias Nunes; Aurélie Schoubben; Tania Mari Bellé Bresolin; Ivan Helmuth Bechold; Maurizio Ricci. Exploring Taxifolin Polymorphs: Insights on Hydrate and Anhydrous Forms. Pharmaceutics 2021, 13, 1328 .
AMA StyleFernanda Cristina Stenger Moura, Nicola Pinna, Riccardo Vivani, Gisele Elias Nunes, Aurélie Schoubben, Tania Mari Bellé Bresolin, Ivan Helmuth Bechold, Maurizio Ricci. Exploring Taxifolin Polymorphs: Insights on Hydrate and Anhydrous Forms. Pharmaceutics. 2021; 13 (9):1328.
Chicago/Turabian StyleFernanda Cristina Stenger Moura; Nicola Pinna; Riccardo Vivani; Gisele Elias Nunes; Aurélie Schoubben; Tania Mari Bellé Bresolin; Ivan Helmuth Bechold; Maurizio Ricci. 2021. "Exploring Taxifolin Polymorphs: Insights on Hydrate and Anhydrous Forms." Pharmaceutics 13, no. 9: 1328.
A multi-methodic analysis was performed on five samples of fly ashes coming from different biomasses. The aim of the study was to evaluate their possible re-use and their dangerousness to people and the environment. Optical granulometric analyses indicated that the average diameter of the studied fly ashes was around 20 µm, whereas only ~1 vol% had diameters lower that 2.5 µm. The chemical composition, investigated with electron probe microanalysis, indicated that all the samples had a composition in which Ca was prevalent, followed by Si and Al. Large contents of K and P were observed in some samples, whereas the amount of potentially toxic elements was always below the Italian law thresholds. Polycyclic aromatic hydrocarbons were completely absent in all the samples coming from combustion plants, whereas they were present in the fly ashes from the gasification center. Quantitative mineralogical content, determined by Rietveld analysis of X-ray powder diffraction data, indicated that all the samples had high amorphous content, likely enriched in Ca, and several K and P minerals, such as sylvite and apatite. The results obtained from the chemo-mineralogical study performed make it possible to point out that biomass fly ashes could be interesting materials (1) for amendments in clayey soils, as a substitution for lime, to stimulate pozzolanic reactions and improve their geotechnical properties, thus, on the one hand, avoiding the need to mine raw materials and, on the other hand, re-cycling waste; and (2) as agricultural fertilizers made by a new and ecological source of K and P.
Paola Comodi; Azzurra Zucchini; Umberto Susta; Costanza Cambi; Riccardo Vivani; Gianluca Cavalaglio; Franco Cotana. Multi-Scale Minero-Chemical Analysis of Biomass Ashes: A Key to Evaluating Their Dangers vs. Benefits. Sustainability 2021, 13, 6052 .
AMA StylePaola Comodi, Azzurra Zucchini, Umberto Susta, Costanza Cambi, Riccardo Vivani, Gianluca Cavalaglio, Franco Cotana. Multi-Scale Minero-Chemical Analysis of Biomass Ashes: A Key to Evaluating Their Dangers vs. Benefits. Sustainability. 2021; 13 (11):6052.
Chicago/Turabian StylePaola Comodi; Azzurra Zucchini; Umberto Susta; Costanza Cambi; Riccardo Vivani; Gianluca Cavalaglio; Franco Cotana. 2021. "Multi-Scale Minero-Chemical Analysis of Biomass Ashes: A Key to Evaluating Their Dangers vs. Benefits." Sustainability 13, no. 11: 6052.
Layered double hydroxides (LDHs) are an ideal platform to host catalytic metal centers for water oxidation (WO) owing to the high accessibility of water to the interlayer region, which makes all centers potentially reachable and activated. Herein, we report the syntheses of three iridium-doped zinc–aluminum LDHs (Ir-LDHs) nanomaterials (1–3, with about 80 nm of planar size and a thickness of 8 nm as derived by field emission scanning electron microscopy and powder X-ray diffraction studies, respectively), carried out in the confined aqueous environment of reverse micelles, through a very simple and versatile procedure. These materials exhibit excellent catalytic performances in WO driven by NaIO4 at neutral pH and 25 °C, with an iridium content as low as 0.5 mol % (∼0.8 wt %), leading to quantitative oxygen yields (based on utilized NaIO4, turnover number up to ∼10,000). Nanomaterials 1–3 display the highest ever reported turnover frequency values (up to 402 min–1) for any heterogeneous and heterogenized catalyst, comparable only to those of the most efficient molecular iridium catalysts, tested under similar reaction conditions. The boost in activity can be traced to the increased surface area and pore volume (>5 times and 1 order of magnitude, respectively, higher than those of micrometric materials of size 0.3–1 μm) estimated for the nanosized particles, which guarantee higher noble metal accessibility. X-ray absorption spectroscopy (XAS) studies suggest that 1–3 nanomaterials, as-prepared and after catalysis, contain a mixture of isolated, single octahedral Ir(III) sites, with no evidence of Ir–Ir scattering from second-nearest neighbors, excluding the presence of IrO2 nanoparticles. The combination of the results obtained from XAS, elemental analysis, and ionic chromatography strongly suggests that iridium is embedded in the brucite-like structure of LDHs, having four hydroxyls and two chlorides as first neighbors. These results demonstrate that nanometric LDHs can be successfully exploited to engineer efficient WOCs, minimizing the amount of iridium used, consistent with the principle of the noble-metal atom economy.
Lucia Fagiolari; Marzia Bini; Ferdinando Costantino; Giordano Gatto; A. Jeremy Kropf; Fabio Marmottini; Morena Nocchetti; Evan C. Wegener; Francesco Zaccaria; Massimiliano Delferro; Riccardo Vivani; Alceo Macchioni. Iridium-Doped Nanosized Zn–Al Layered Double Hydroxides as Efficient Water Oxidation Catalysts. ACS Applied Materials & Interfaces 2020, 12, 32736 -32745.
AMA StyleLucia Fagiolari, Marzia Bini, Ferdinando Costantino, Giordano Gatto, A. Jeremy Kropf, Fabio Marmottini, Morena Nocchetti, Evan C. Wegener, Francesco Zaccaria, Massimiliano Delferro, Riccardo Vivani, Alceo Macchioni. Iridium-Doped Nanosized Zn–Al Layered Double Hydroxides as Efficient Water Oxidation Catalysts. ACS Applied Materials & Interfaces. 2020; 12 (29):32736-32745.
Chicago/Turabian StyleLucia Fagiolari; Marzia Bini; Ferdinando Costantino; Giordano Gatto; A. Jeremy Kropf; Fabio Marmottini; Morena Nocchetti; Evan C. Wegener; Francesco Zaccaria; Massimiliano Delferro; Riccardo Vivani; Alceo Macchioni. 2020. "Iridium-Doped Nanosized Zn–Al Layered Double Hydroxides as Efficient Water Oxidation Catalysts." ACS Applied Materials & Interfaces 12, no. 29: 32736-32745.
Doping low-cost LDHs with noble metal atoms represents a promising approach to develop effective heterogeneous Water Oxidation Catalysts.
Lucia Fagiolari; Francesco Zaccaria; Ferdinando Costantino; Riccardo Vivani; Christos K. Mavrokefalos; Greta R. Patzke; Alceo Macchioni. Ir- and Ru-doped layered double hydroxides as affordable heterogeneous catalysts for electrochemical water oxidation. Dalton Transactions 2020, 49, 2468 -2476.
AMA StyleLucia Fagiolari, Francesco Zaccaria, Ferdinando Costantino, Riccardo Vivani, Christos K. Mavrokefalos, Greta R. Patzke, Alceo Macchioni. Ir- and Ru-doped layered double hydroxides as affordable heterogeneous catalysts for electrochemical water oxidation. Dalton Transactions. 2020; 49 (8):2468-2476.
Chicago/Turabian StyleLucia Fagiolari; Francesco Zaccaria; Ferdinando Costantino; Riccardo Vivani; Christos K. Mavrokefalos; Greta R. Patzke; Alceo Macchioni. 2020. "Ir- and Ru-doped layered double hydroxides as affordable heterogeneous catalysts for electrochemical water oxidation." Dalton Transactions 49, no. 8: 2468-2476.
The reaction of nanocrystalline layered α-zirconium phosphate with a diepoxyalkane led to covalently pillared layered materials able to reversibly take up organic molecules both from liquid and vapor phases at room temperature.
Monica Pica; Anna Donnadio; Riccardo Vivani; Elisa Boccalon; Mirella Scattini; Mario Casciola. A new challenge for nanocrystalline α-zirconium phosphate: reaction with a diepoxyalkane. Dalton Transactions 2019, 49, 3869 -3876.
AMA StyleMonica Pica, Anna Donnadio, Riccardo Vivani, Elisa Boccalon, Mirella Scattini, Mario Casciola. A new challenge for nanocrystalline α-zirconium phosphate: reaction with a diepoxyalkane. Dalton Transactions. 2019; 49 (12):3869-3876.
Chicago/Turabian StyleMonica Pica; Anna Donnadio; Riccardo Vivani; Elisa Boccalon; Mirella Scattini; Mario Casciola. 2019. "A new challenge for nanocrystalline α-zirconium phosphate: reaction with a diepoxyalkane." Dalton Transactions 49, no. 12: 3869-3876.
A layered insoluble inorganic-organic solid, namely zirconium phosphate glycine-N,N-bismethylphosphonate, was used to prepare dispersions of nanosheets to support active metals such as metallic silver nanoparticles and zinc ions. Zr phosphate-phosphonate microcrystals were first exfoliated with methylamine to produce a stable colloidal dispersion and then the methylamine was removed by treatment with hydrochloric acid. The obtained colloidal dispersion of Zr phosphate-phosphonate nanosheets was used to immobilize silver or zinc cations, via ion exchange, with the acidic protons of the sheets. The layered matrix showed a great affinity for the metal cations up taking all the added cations. The treatment of the dispersions containing silver ions with ethanol yielded metal silver nanoparticles grafted on the surface of the layered host. The samples were characterized by X-ray powder diffraction, elemental analysis transmission electron microscopy, and selected samples were submitted to antimicrobial tests. The nanocomposites based on Ag nanoparticles showed good bactericidal properties against the bacterial reference strain Staphylococcus epidermidis (S. epidermidis).
Morena Nocchetti; Anna Donnadio; Eleonora Vischini; Tamara Posati; Stefano Ravaioli; Carla Renata Arciola; Davide Campoccia; Riccardo Vivani. Zirconium Carboxyaminophosphonate Nanosheets as Support for Ag Nanoparticles. Materials 2019, 12, 3185 .
AMA StyleMorena Nocchetti, Anna Donnadio, Eleonora Vischini, Tamara Posati, Stefano Ravaioli, Carla Renata Arciola, Davide Campoccia, Riccardo Vivani. Zirconium Carboxyaminophosphonate Nanosheets as Support for Ag Nanoparticles. Materials. 2019; 12 (19):3185.
Chicago/Turabian StyleMorena Nocchetti; Anna Donnadio; Eleonora Vischini; Tamara Posati; Stefano Ravaioli; Carla Renata Arciola; Davide Campoccia; Riccardo Vivani. 2019. "Zirconium Carboxyaminophosphonate Nanosheets as Support for Ag Nanoparticles." Materials 12, no. 19: 3185.
A novel compound consisting of a zirconium phosphate-glycinediphosphonate (ZPGly) has recently been introduced. This 2D-structured material forming nanosheets was exfoliated under appropriate conditions, producing colloidal aqueous dispersions (ZPGly-e) which were then loaded with zinc (Zn/ZPGly) or silver ions. Silver ions were subsequently reduced to produce metallic silver nanoparticles on exfoliated ZPGly nanosheets ([email protected]). In the search for new anti-infective materials, the present study investigated the properties of colloidal dispersions of ZPGly-e, Zn/ZPGly, and [email protected] [email protected] was found to be a bactericidal material and was assayed to define its minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) on the five most prevalent pathogens of orthopaedic implant infections, namely: Staphylococcus aureus ATCC25923, Staphylococcus epidermidis RP62A, Enterococcus faecalis ATCC29212, Escherichia coli ATCC51739, and Pseudomonas aeruginosa ATCC27853. MIC and MBC were in the range of 125–250 μg/mL and 125–1000 μg/mL, respectively, with E. coli being the most sensitive species. Even colloidal suspensions of exfoliated ZPGly nanosheets and Zn/ZPGly exhibited some intrinsic antibacterial properties, but only at greater concentrations. Unexpectedly, Zn/ZPGly was less active than ZPGly-e.
Davide Campoccia; Stefano Ravaioli; Riccardo Vivani; Anna Donnadio; Eleonora Vischini; Alessandro Russo; Livia Visai; Carla Renata Arciola; Lucio Montanaro; Morena Nocchetti. Antibacterial Properties of a Novel Zirconium Phosphate-Glycinediphosphonate Loaded with Either Zinc or Silver. Materials 2019, 12, 3184 .
AMA StyleDavide Campoccia, Stefano Ravaioli, Riccardo Vivani, Anna Donnadio, Eleonora Vischini, Alessandro Russo, Livia Visai, Carla Renata Arciola, Lucio Montanaro, Morena Nocchetti. Antibacterial Properties of a Novel Zirconium Phosphate-Glycinediphosphonate Loaded with Either Zinc or Silver. Materials. 2019; 12 (19):3184.
Chicago/Turabian StyleDavide Campoccia; Stefano Ravaioli; Riccardo Vivani; Anna Donnadio; Eleonora Vischini; Alessandro Russo; Livia Visai; Carla Renata Arciola; Lucio Montanaro; Morena Nocchetti. 2019. "Antibacterial Properties of a Novel Zirconium Phosphate-Glycinediphosphonate Loaded with Either Zinc or Silver." Materials 12, no. 19: 3184.
A new technology was tested to improve the cooking efficiency of the raw mixture for Portland clinker production by the use of nano-Ca(OH)2. A decrease in the free lime concentration after the firing of approximately 35% and 55% in the nano-added clinkers burned at 1350 °C and 1450 °C, respectively, with respect to the standard Portland clinkers was observed. Moreover, in the nano-added clinkers, a slight decrease in alite (C3S), of approximately 2-4 wt%, and increase in belite (C2S), of approximately 5-6 wt%, were observed. Despite these variations, the C2S and C3S abundance lies within the ranges for standard Portland clinkers. The results showed that the nano-addition leads to an increase of the raw mixtures' cooking efficiency. The relatively low energy required for the clinker firing could be used to increase the plant productivity and decrease the CO2 emissions during clinker burning. The decrease of the work index of the clinkers produced by the use of the nano-Ca(OH)2 also contributes to the energy saving during clinker grinding. Differences were also found in the pore size distribution among nano-added clinkers and the standard Portland clinker. The smallest porosities with the modal volume lying in the class of 3∙10-6 mm3 were found to increase by the use of nano-Ca(OH)2. However, the pore volumes higher than 2.0∙10-5 mm3 decreased in the nano-added clinkers.
Azzurra Zucchini; Paola Comodi; Alessandro Di Michele; Riccardo Vivani; Lucia Mancini; Gabriele Lanzafame; Serena Casagrande; Silvia Gentili; Francesco Vetere; Luca Bartolucci; Gianluca Polidori; Fabio Santinelli; Alessandro Neri. Effect of the Nano-Ca(OH)2 Addition on the Portland Clinker Cooking Efficiency. Materials 2019, 12, 1787 .
AMA StyleAzzurra Zucchini, Paola Comodi, Alessandro Di Michele, Riccardo Vivani, Lucia Mancini, Gabriele Lanzafame, Serena Casagrande, Silvia Gentili, Francesco Vetere, Luca Bartolucci, Gianluca Polidori, Fabio Santinelli, Alessandro Neri. Effect of the Nano-Ca(OH)2 Addition on the Portland Clinker Cooking Efficiency. Materials. 2019; 12 (11):1787.
Chicago/Turabian StyleAzzurra Zucchini; Paola Comodi; Alessandro Di Michele; Riccardo Vivani; Lucia Mancini; Gabriele Lanzafame; Serena Casagrande; Silvia Gentili; Francesco Vetere; Luca Bartolucci; Gianluca Polidori; Fabio Santinelli; Alessandro Neri. 2019. "Effect of the Nano-Ca(OH)2 Addition on the Portland Clinker Cooking Efficiency." Materials 12, no. 11: 1787.
In September 2018, the First European Workshop on Metal Phosphonates Chemistry brought together some prominent researchers in the field of metal phosphonates and phosphinates with the aim of discussing past and current research efforts and identifying future directions. The scope of this perspective article is to provide a critical overview of the topics discussed during the workshop, which are divided into two main areas: synthesis and characterisation, and applications. In terms of synthetic methods, there has been a push towards cleaner and more efficient approaches. This has led to the introduction of high-throughput synthesis and mechanochemical synthesis. The recent success of metal–organic frameworks has also promoted renewed interest in the synthesis of porous metal phosphonates and phosphinates. Regarding characterisation, the main advances are the development of electron diffraction as a tool for crystal structure determination and the deployment of in situ characterisation techniques, which have allowed for a better understanding of reaction pathways. In terms of applications, metal phosphonates have been found to be suitable materials for several purposes: they have been employed as heterogeneous catalysts for the synthesis of fine chemicals, as solid sorbents for gas separation, notably CO2 capture, as materials for electrochemical devices, such as fuel cells and rechargeable batteries, and as matrices for drug delivery.
Stephen J.I. Shearan; Norbert Stock; Franziska Emmerling; Jan Demel; Paul A. Wright; Konstantinos D. Demadis; Maria Vassaki; Ferdinando Costantino; Riccardo Vivani; Sébastien Sallard; Inés Ruiz Salcedo; Aurelio Cabeza; Marco Taddei. New Directions in Metal Phosphonate and Phosphinate Chemistry. Crystals 2019, 9, 270 .
AMA StyleStephen J.I. Shearan, Norbert Stock, Franziska Emmerling, Jan Demel, Paul A. Wright, Konstantinos D. Demadis, Maria Vassaki, Ferdinando Costantino, Riccardo Vivani, Sébastien Sallard, Inés Ruiz Salcedo, Aurelio Cabeza, Marco Taddei. New Directions in Metal Phosphonate and Phosphinate Chemistry. Crystals. 2019; 9 (5):270.
Chicago/Turabian StyleStephen J.I. Shearan; Norbert Stock; Franziska Emmerling; Jan Demel; Paul A. Wright; Konstantinos D. Demadis; Maria Vassaki; Ferdinando Costantino; Riccardo Vivani; Sébastien Sallard; Inés Ruiz Salcedo; Aurelio Cabeza; Marco Taddei. 2019. "New Directions in Metal Phosphonate and Phosphinate Chemistry." Crystals 9, no. 5: 270.
Taxifolin possesses gastroprotective property but is characterized by low water solubility, is instabile in alkaline medium, and is degraded by the intestinal bacteria flora. The purpose of the work was therefore to produce a gastroadhesive formulation to prolong taxifolin residence time and release in the stomach. We first demonstrated that taxifolin is stable in simulated gastric fluid with or without pepsin and mucus, and is able to cross pig gastric mucus layer and stomach mucosa. Next, gastromucoadhesive microparticles composed of Syloid® AL-1 mesoporous silica, chitosan and HPMC were produced using spray-drying. Microparticles were characterized by a spherical shape and a mean volume-equivalent diameter around 12 µm. The optimized microparticles were able to release taxifolin and to adhere to pig stomach mucosa for 5 h.
F.C. Stenger Moura; L. Perioli; C. Pagano; R. Vivani; V. Ambrogi; Tania Bresolin; M. Ricci; A. Schoubben. Chitosan composite microparticles: A promising gastroadhesive system for taxifolin. Carbohydrate Polymers 2019, 218, 343 -354.
AMA StyleF.C. Stenger Moura, L. Perioli, C. Pagano, R. Vivani, V. Ambrogi, Tania Bresolin, M. Ricci, A. Schoubben. Chitosan composite microparticles: A promising gastroadhesive system for taxifolin. Carbohydrate Polymers. 2019; 218 ():343-354.
Chicago/Turabian StyleF.C. Stenger Moura; L. Perioli; C. Pagano; R. Vivani; V. Ambrogi; Tania Bresolin; M. Ricci; A. Schoubben. 2019. "Chitosan composite microparticles: A promising gastroadhesive system for taxifolin." Carbohydrate Polymers 218, no. : 343-354.
The objective of the work was to produce a new excipient based on D-leucine to improve the aerosolization properties of the poorly flowable micronized budesonide. The D-leucine powders produced by a nano spray-dryer were characterized in terms of dimensions, morphology, thermal behavior, X-ray powder diffraction and infrared spectroscopy. Then, micronized budesonide was mixed with the different leucine powders obtained or commercial D-leucine at different weight ratios (1:1, 5:1, 10:1) to investigate their aerodynamic characteristics using a glass twin-stage impinger. Commercial D-leucine powder is composed of large flattened crystals of about 30 μm with ~3 μm thickness, while micronized budesonide appeared as small irregular crystals. After spray-drying, D-leucine particles appeared wrinkled and porous. Particle sizes were mainly influenced by the amino acid concentration. Aerodynamic assessment showed that D-leucine was able to improve the aerodynamic behavior of micronized budesonide from about 28 to 45% emitted fraction. The best aerodynamic properties were obtained with D-leucine powdered from a water:ethanol (1:1, v:v) solution and using micronized budesonide:leucine weight ratio of 5:1. The direct physical mixing of the atomized D-leucine with the micronized active pharmaceutical ingredient is a valid and economic alternative for the production of carrier-free dry powders for inhalation.
Aurélie Schoubben; Riccardo Vivani; Marco Paolantoni; Diego Romano Perinelli; Antimo Gioiello; Antonio Macchiarulo; Maurizio Ricci. D-leucine microparticles as an excipient to improve the aerosolization performances of dry powders for inhalation. European Journal of Pharmaceutical Sciences 2019, 130, 54 -64.
AMA StyleAurélie Schoubben, Riccardo Vivani, Marco Paolantoni, Diego Romano Perinelli, Antimo Gioiello, Antonio Macchiarulo, Maurizio Ricci. D-leucine microparticles as an excipient to improve the aerosolization performances of dry powders for inhalation. European Journal of Pharmaceutical Sciences. 2019; 130 ():54-64.
Chicago/Turabian StyleAurélie Schoubben; Riccardo Vivani; Marco Paolantoni; Diego Romano Perinelli; Antimo Gioiello; Antonio Macchiarulo; Maurizio Ricci. 2019. "D-leucine microparticles as an excipient to improve the aerosolization performances of dry powders for inhalation." European Journal of Pharmaceutical Sciences 130, no. : 54-64.
Zirconium phosphate bearing aminoethyl groups on the layer surface, ZP(AEP), was used to immobilize AuNPs. The gold-based catalyst proved its high efficiency for the chemoselective reduction of nitroarenes under both batch and flow conditions by using NaBH4 as a reducing agent.
Francesco Ferlin; Matteo Cappelletti; Riccardo Vivani; Monica Pica; Oriana Piermatti; Luigi Vaccaro. [email protected] nanoparticles as an effective catalytic system for the chemoselective and switchable reduction of nitroarenes. Green Chemistry 2019, 21, 614 -626.
AMA StyleFrancesco Ferlin, Matteo Cappelletti, Riccardo Vivani, Monica Pica, Oriana Piermatti, Luigi Vaccaro. [email protected] nanoparticles as an effective catalytic system for the chemoselective and switchable reduction of nitroarenes. Green Chemistry. 2019; 21 (3):614-626.
Chicago/Turabian StyleFrancesco Ferlin; Matteo Cappelletti; Riccardo Vivani; Monica Pica; Oriana Piermatti; Luigi Vaccaro. 2019. "[email protected] nanoparticles as an effective catalytic system for the chemoselective and switchable reduction of nitroarenes." Green Chemistry 21, no. 3: 614-626.
In this work, we have characterized the iron local structure in samples of two different types of atmospheric dust using X-ray absorption spectroscopy and selective leaching experiments. Specifically, we have investigated samples of long-range transported Saharan dust and freshly emitted steel plant fumes with the aim of individuating possible fingerprints of iron in the two cases. Findings include (1) prevalence of octahedral coordinated Fe 3 + for all samples; (2) presence of 6-fold coordinated Fe 3 + , aluminosilicates and iron oxy(hydr)oxides in Saharan dust and (3) of Fe-bearing spinel-like structures in the industrial fumes; (4) general predominance of the residual insoluble fraction with a notable difference: 69% for Saharan dust and 93% for steel production emissions, associated with aluminosilicates and non-reducible iron oxy(hydr)oxides, and Fe spinels, respectively. The remarkable differences between the X-ray absorption spectroscopy (XAS) spectra and leaching test results for the two sample types suggest the possibility to exploit the present approach in more complex cases. To this aim, two additional case studies of mixed aerosol samples are presented and discussed.
Chiara Petroselli; Beatrice Moroni; Stefano Crocchianti; Roberta Selvaggi; Riccardo Vivani; Francesco Soggia; Marco Grotti; Francesco D’Acapito; David Cappelletti. Iron Speciation of Natural and Anthropogenic Dust by Spectroscopic and Chemical Methods. Atmosphere 2018, 10, 8 .
AMA StyleChiara Petroselli, Beatrice Moroni, Stefano Crocchianti, Roberta Selvaggi, Riccardo Vivani, Francesco Soggia, Marco Grotti, Francesco D’Acapito, David Cappelletti. Iron Speciation of Natural and Anthropogenic Dust by Spectroscopic and Chemical Methods. Atmosphere. 2018; 10 (1):8.
Chicago/Turabian StyleChiara Petroselli; Beatrice Moroni; Stefano Crocchianti; Roberta Selvaggi; Riccardo Vivani; Francesco Soggia; Marco Grotti; Francesco D’Acapito; David Cappelletti. 2018. "Iron Speciation of Natural and Anthropogenic Dust by Spectroscopic and Chemical Methods." Atmosphere 10, no. 1: 8.
Reaction of cerium ammonium nitrate and tetrafluoroterephthalic acid in water afforded two new metal-organic frameworks with UiO-66 [F4_UiO-66(Ce)] and MIL-140 [F4_MIL-140A(Ce)] topologies. The two compounds can be obtained in the same experimental conditions, just by varying the amount of acetic acid used as crystallization modulator in the synthesis. Both F4_UiO-66(Ce) and F4_MIL-140A(Ce) feature pores with size < 8 Å, which classifies them as ultramicroporous. Combination of X-ray photoelectron spectroscopy and magnetic susceptibility measurements revealed that both compounds contain a small amount of Ce(III), which is preferentially accumulated near the surface of the crystallites. The CO2 sorption properties of F4_UiO-66(Ce) and F4_MIL-140A(Ce) were investigated, finding that they perform better than their Zr-based analogues. F4_MIL-140A(Ce) displays an unusual S-shaped isotherm with steep uptake increase at pressure < 0.2 bar at 298 K. This makes F4_MIL-140A(Ce) exceptionally selective for CO2 over N2: the calculated selectivity, according to the ideal adsorbed solution theory for a 0.15:0.85 mixture at 1 bar and 293 K, is higher than 1900, amongst the highest ever reported for metal-organic frameworks. The calculated isosteric heat of CO2 adsorption is in the range of 38-40 kJ mol-1, indicating a strong physisorptive character.
Roberto D'Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Davide Tiana; Riccardo Vivani; Marco Taddei; Ferdinando Costantino. Water-Based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal–Organic Frameworks with UiO-66 and MIL-140 Topology. ACS Sustainable Chemistry & Engineering 2018, 7, 394 -402.
AMA StyleRoberto D'Amato, Anna Donnadio, Mariolino Carta, Claudio Sangregorio, Davide Tiana, Riccardo Vivani, Marco Taddei, Ferdinando Costantino. Water-Based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal–Organic Frameworks with UiO-66 and MIL-140 Topology. ACS Sustainable Chemistry & Engineering. 2018; 7 (1):394-402.
Chicago/Turabian StyleRoberto D'Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Davide Tiana; Riccardo Vivani; Marco Taddei; Ferdinando Costantino. 2018. "Water-Based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal–Organic Frameworks with UiO-66 and MIL-140 Topology." ACS Sustainable Chemistry & Engineering 7, no. 1: 394-402.
This work aims to identify the geochemical and mineralogical markers of Icelandic dust and to differentiate it from the dust of local origin deposited at the Ny-Ålesund station. We characterized representative sediment samples from Iceland and Svalbard and compared them to a set of aerosol samples collected in Ny-Ålesund to check the existence and type of the mineralogical markers. The sediment samples were analyzed by X-ray diffraction (XRD) to detect the mineralogical constrain of the geochemical markers. Both aerosol and sediment samples were examined by scanning electron microscopy coupled with EDS microanalysis (SEM-EDS) and image analysis to detect and to provide a morpho-chemical characterization of the mineralogical markers of dust provenance. Comparison between local and Icelandic sediments reveals the metal oxide particles as the most representative and distinguishing mineralogical/phase markers for Iceland dust sources. In particular, we have considered the magnetite-chromite and the magnetite-ülvospinel associations as marker facies of the tholeiitic magmatic series and the presence of volcanic glass as a further indicator of provenance from Iceland. The morphochemical characteristics of the metal oxide particles in the aerosol samples compared to those of the sediment samples have proved to be a powerful tool to separate Icelandic dust from other sources for dust. In particular, the small size, higher grain boundary complexity and lower Fe/Cr ratios suggest the influence of anthropogenic sources, well in accordance with the results of air mass backward trajectories which reveal a main contribution from industrialized areas in Eurasia. This study shows the reliability of the geochemical characterization of the metal oxide particles for the identification of the source regions of dust. In addition it provides an evidence that Icelandic dust can be transported long range to Svalbard confirming the importance of High Latitude Dust sources.
Beatrice Moroni; Olafur Arnalds; Pavla Dagsson-Waldhauserova; Stefano Crocchianti; Riccardo Vivani; David Cappelletti. Mineralogical and Chemical Records of Icelandic Dust Sources Upon Ny-Ålesund (Svalbard Islands). Frontiers in Earth Science 2018, 6, 1 .
AMA StyleBeatrice Moroni, Olafur Arnalds, Pavla Dagsson-Waldhauserova, Stefano Crocchianti, Riccardo Vivani, David Cappelletti. Mineralogical and Chemical Records of Icelandic Dust Sources Upon Ny-Ålesund (Svalbard Islands). Frontiers in Earth Science. 2018; 6 ():1.
Chicago/Turabian StyleBeatrice Moroni; Olafur Arnalds; Pavla Dagsson-Waldhauserova; Stefano Crocchianti; Riccardo Vivani; David Cappelletti. 2018. "Mineralogical and Chemical Records of Icelandic Dust Sources Upon Ny-Ålesund (Svalbard Islands)." Frontiers in Earth Science 6, no. : 1.
Reaction of cerium ammonium nitrate and tetrafluoroterephthalic acid in water afforded two new metal-organic frameworks with UiO-66 [F4_UiO-66(Ce)] and MIL-140 [F4_MIL-140A(Ce)] topologies. The two compounds can be obtained in the same experimental conditions, just by varying the amount of acetic acid used as crystallization modulator in the synthesis. Both F4_UiO-66(Ce) and F4_MIL-140A(Ce) feature pores with size < 8 Å, which classifies them as ultramicroporous. Combination of X-ray photoelectron spectroscopy and magnetic susceptibility measurements revealed that both compounds contain a small amount of Ce(III), which is preferentially accumulated near the surface of the crystallites. The CO2 sorption properties of F4_UiO-66(Ce) and F4_MIL-140A(Ce) were investigated, finding that they perform better than their Zr-based analogues. F4_MIL-140A(Ce) displays an unusual S-shaped isotherm with steep uptake increase at pressure < 0.2 bar at 298 K. This makes F4_MIL-140A(Ce) exceptionally selective for CO2 over N2: the calculated selectivity, according to the ideal adsorbed solution theory for a 0.15:0.85 mixture at 1 bar and 293 K, is higher than 1900, amongst the highest ever reported for metal-organic frameworks. The calculated isosteric heat of CO2 adsorption is in the range of 38-40 kJ mol-1, indicating a strong physisorptive character.
Roberto D’Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Riccardo Vivani; Davide Tiana; Marco Taddei; Ferdinando Costantino. Water-based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology. 2018, 1 .
AMA StyleRoberto D’Amato, Anna Donnadio, Mariolino Carta, Claudio Sangregorio, Riccardo Vivani, Davide Tiana, Marco Taddei, Ferdinando Costantino. Water-based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology. . 2018; ():1.
Chicago/Turabian StyleRoberto D’Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Riccardo Vivani; Davide Tiana; Marco Taddei; Ferdinando Costantino. 2018. "Water-based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology." , no. : 1.
Reaction of cerium ammonium nitrate and tetrafluoroterephthalic acid in water afforded two new metal-organic frameworks with UiO-66 [F4_UiO-66(Ce)] and MIL-140 [F4_MIL-140A(Ce)] topologies. The two compounds can be obtained in the same experimental conditions, just by varying the amount of acetic acid used as crystallization modulator in the synthesis. Both F4_UiO-66(Ce) and F4_MIL-140A(Ce) feature pores with size < 8 Å, which classifies them as ultramicroporous. Combination of X-ray photoelectron spectroscopy and magnetic susceptibility measurements revealed that both compounds contain a small amount of Ce(III), which is preferentially accumulated near the surface of the crystallites. The CO2 sorption properties of F4_UiO-66(Ce) and F4_MIL-140A(Ce) were investigated, finding that they perform better than their Zr-based analogues. F4_MIL-140A(Ce) displays an unusual S-shaped isotherm with steep uptake increase at pressure < 0.2 bar at 298 K. This makes F4_MIL-140A(Ce) exceptionally selective for CO2 over N2: the calculated selectivity, according to the ideal adsorbed solution theory for a 0.15:0.85 mixture at 1 bar and 293 K, is higher than 1900, amongst the highest ever reported for metal-organic frameworks. The calculated isosteric heat of CO2 adsorption is in the range of 38-40 kJ mol-1, indicating a strong physisorptive character.
Roberto D’Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Riccardo Vivani; Davide Tiana; Marco Taddei; Ferdinando Costantino. Water-based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology. 2018, 1 .
AMA StyleRoberto D’Amato, Anna Donnadio, Mariolino Carta, Claudio Sangregorio, Riccardo Vivani, Davide Tiana, Marco Taddei, Ferdinando Costantino. Water-based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology. . 2018; ():1.
Chicago/Turabian StyleRoberto D’Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Riccardo Vivani; Davide Tiana; Marco Taddei; Ferdinando Costantino. 2018. "Water-based Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology." , no. : 1.
Reaction of cerium ammonium nitrate and tetrafluoroterephthalic acid in water afforded two new metal-organic frameworks with UiO-66 [F4_UiO-66(Ce)] and MIL-140 [F4_MIL-140A(Ce)] topologies. The two compounds can be obtained in the same experimental conditions, just by varying the amount of acetic acid used as crystallization modulator in the synthesis. Both F4_UiO-66(Ce) and F4_MIL-140A(Ce) feature pores with size < 8 Å, which classifies them as ultramicroporous. Combination of X-ray photoelectron spectroscopy and magnetic susceptibility measurements revealed that both compounds contain a small amount of Ce(III), which is preferentially accumulated near the surface of the crystallites. The CO2 sorption properties of F4_UiO-66(Ce) and F4_MIL-140A(Ce) were investigated, finding that they perform better than their Zr-based analogues. F4_MIL-140A(Ce) displays an unusual S-shaped isotherm with steep uptake increase at pressure < 0.2 bar at 298 K. This makes F4_MIL-140A(Ce) exceptionally selective for CO2 over N2: the calculated selectivity, according to the ideal adsorbed solution theory for a 0.15:0.85 mixture at 1 bar and 293 K, is higher than 1900, amongst the highest ever reported for metal-organic frameworks. The calculated isosteric heat of CO2 adsorption is in the range of 38-40 kJ mol-1, indicating a strong physisorptive character.
Roberto D’Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Riccardo Vivani; Marco Taddei; Ferdinando Costantino. Green Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology. 2018, 1 .
AMA StyleRoberto D’Amato, Anna Donnadio, Mariolino Carta, Claudio Sangregorio, Riccardo Vivani, Marco Taddei, Ferdinando Costantino. Green Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology. . 2018; ():1.
Chicago/Turabian StyleRoberto D’Amato; Anna Donnadio; Mariolino Carta; Claudio Sangregorio; Riccardo Vivani; Marco Taddei; Ferdinando Costantino. 2018. "Green Synthesis and Enhanced CO2 Capture Performance of Perfluorinated Cerium-Based Metal-Organic Frameworks with UiO-66 and MIL-140 Topology." , no. : 1.
A layered yttrium phosphonate based on N-(phosphonomethyl)glycine (H3L) and of formula Y(PO3CH2NHCH2COOH)(HPO3CH2NHCH2COOH) was synthesized in mild hydrothermal conditions. Its crystal structure was first determined by single-crystal X-ray diffraction. Then, the synthetic parameters were changed in order to reduce the particle size of the compound. The use of microwave (MW) irradiation during the synthesis allowed a) to obtain the compound in form of nanoparticles (NP) in the 50–300 nm range dispersed in water, b) to strongly reduce the reaction time by a factor 150, and c) to successfully introduce into the structure small amounts of a luminescent ion like terbium(III) as an isomorphic substituent of yttrium(III). The obtained NP were used to prepare composite materials by dispersing them in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The resulting optical, photophysical, morphological and electrical properties of modified and pristine PEDOT:PSS films were investigated and compared, in order to test the potential use of Y(H2L)(HL) NP as luminescent downshifting materials in optoelectronic devices.
Tamara Posati; Morena Nocchetti; Riccardo Vivani; Michela Pistola; Margherita Bolognesi; Mirko Seri; Ferdinando Costantino. Layered Tb-Doped Yttrium Carboxyphosphonate Nanocrystals as Efficient Filler for PEDOT:PSS Composite Films. ChemNanoMat 2017, 3, 575 -582.
AMA StyleTamara Posati, Morena Nocchetti, Riccardo Vivani, Michela Pistola, Margherita Bolognesi, Mirko Seri, Ferdinando Costantino. Layered Tb-Doped Yttrium Carboxyphosphonate Nanocrystals as Efficient Filler for PEDOT:PSS Composite Films. ChemNanoMat. 2017; 3 (8):575-582.
Chicago/Turabian StyleTamara Posati; Morena Nocchetti; Riccardo Vivani; Michela Pistola; Margherita Bolognesi; Mirko Seri; Ferdinando Costantino. 2017. "Layered Tb-Doped Yttrium Carboxyphosphonate Nanocrystals as Efficient Filler for PEDOT:PSS Composite Films." ChemNanoMat 3, no. 8: 575-582.
Zirconium phosphate glycine diphosphonate nanosheets (ZPGly) have been used as support for the preparation of solid palladium nanoparticles, namely [email protected] Thanks to the presence of carboxy-aminophosponate groups on the layer surface, ZPGly-based materials were able to stabilize a high amount of palladium (up to 22 wt %) also minimizing the amount of metal leached in the final products of representative important cross-coupling processes selected for proving the catalysts’ efficiency. The catalytic systems have been fully characterized and used in low amounts (0.1 mol %) in the Suzuki–Miyaura and Heck cross-couplings. Moreover, the protocols were optimized for the use of recoverable azeotropic mixtures (aq. EtOH 96% or aq. CH3CN 84%, respectively) and in the flow procedure allowing one to isolate the final pure products, without any purification step, with very low residual palladium content and with a very low waste production.
Vadym Kozell; Tommaso Giannoni; Morena Nocchetti; Riccardo Vivani; Oriana Piermatti; Luigi Vaccaro. Immobilized Palladium Nanoparticles on Zirconium Carboxy-Aminophosphonates Nanosheets as an Efficient Recoverable Heterogeneous Catalyst for Suzuki–Miyaura and Heck Coupling. Catalysts 2017, 7, 186 .
AMA StyleVadym Kozell, Tommaso Giannoni, Morena Nocchetti, Riccardo Vivani, Oriana Piermatti, Luigi Vaccaro. Immobilized Palladium Nanoparticles on Zirconium Carboxy-Aminophosphonates Nanosheets as an Efficient Recoverable Heterogeneous Catalyst for Suzuki–Miyaura and Heck Coupling. Catalysts. 2017; 7 (6):186.
Chicago/Turabian StyleVadym Kozell; Tommaso Giannoni; Morena Nocchetti; Riccardo Vivani; Oriana Piermatti; Luigi Vaccaro. 2017. "Immobilized Palladium Nanoparticles on Zirconium Carboxy-Aminophosphonates Nanosheets as an Efficient Recoverable Heterogeneous Catalyst for Suzuki–Miyaura and Heck Coupling." Catalysts 7, no. 6: 186.