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A heterogeneous photocatalyst amenable to catalyze different chemical reactions is a highly enabling and sustainable material for organic synthesis. Herein we report the synthesis and characterization of an azobenzene-based organic π–conjugated porous polymer (AzoCPP) as heterogeneous dual photocatalyst manifesting net-oxidative bromination of arenes and dehydroxylation of boronic acids to corresponding phenols. Hierarchical porosity and high surface area of the nano-sized AzoCPP allowed superior catalyst-substrate contact during catalyses, whereas the inherent structural defect present in the CPP backbone resulted in low-energy sinks functioning as de facto catalytic sites. A combination of these two structure-property aspects of AzoCPP, in addition to the dielectric constant manipulation of the system, led to excellent catalytic performance. The protocols remained valid for a wide substrate scope and the catalyst was recycled multiple times without substantial loss in catalytic activity. With the aid of subsequent control experiments and analytical characterizations, mechanisms for each catalysis are proposed and duly corroborated.
Ipsita Nath; Jeet Chakraborty; Sara Abednatanzi; Pascal Van Der Voort. A ‘Defective’ Conjugated Porous Poly-Azo as Dual Photocatalyst. Catalysts 2021, 11, 1064 .
AMA StyleIpsita Nath, Jeet Chakraborty, Sara Abednatanzi, Pascal Van Der Voort. A ‘Defective’ Conjugated Porous Poly-Azo as Dual Photocatalyst. Catalysts. 2021; 11 (9):1064.
Chicago/Turabian StyleIpsita Nath; Jeet Chakraborty; Sara Abednatanzi; Pascal Van Der Voort. 2021. "A ‘Defective’ Conjugated Porous Poly-Azo as Dual Photocatalyst." Catalysts 11, no. 9: 1064.
Cu–NH3 bearing effluents arise from electroplating and metal extraction industries, requiring innovative and sustainable Cu recovery technologies to reduce their adverse environmental impact. CO32− and Zn are often co-occurring, and thus, selective Cu recovery from these complex liquid streams is required for economic viability. This study assessed 23 sustainable biosorbents classified as tannin-rich, lignin-rich, chitosan/chitin, dead biomass, macroalgae or biochar for their Cu adsorption capacity and selectivity in a complex NH3-bearing bioleachate. Under a preliminary screen with 12 mM Cu in 1 M ammoniacal solution, most biosorbents showed optimal Cu adsorption at pH 11, with pinecone remarkably showing high removal efficiencies (up to 68%) at all tested pH values. Further refinements on select biosorbents with pH, contact time, and presence of NH3, Zn and CO32− showed again that pinecone has a high maximum adsorption capacity (1.07 mmol g−1), worked over pH 5–12 and was Cu-selective with 3.97 selectivity quotient (KCu/Zn). Importantly, pinecone performance was maintained in a real Cu/NH3/Zn/CO32− bioleachate, with 69.4% Cu removal efficiency. Unlike synthetic adsorbents, pinecones require no pre-treatment, which together with its abundance, selectivity, and efficiency without the need for prior NH3 removal, makes it a competitive and sustainable Cu biosorbent for complex Cu–NH3 bearing streams. Overall, this study demonstrated the potential of integrating bioleaching and biosorption as a clean Cu recovery technology utilizing only sustainable resources (i.e., bio-lixiviant and biosorbents). This presents a closed-loop approach to Cu extraction and recovery from wastes, thus effectively addressing elemental sustainability.
Nina Ricci Nicomel; Lila Otero-Gonzalez; Adam Williamson; Yong Sik Ok; Pascal Van Der Voort; Tom Hennebel; Gijs Du Laing. Selective copper recovery from ammoniacal waste streams using a systematic biosorption process. Chemosphere 2021, 286, 131935 .
AMA StyleNina Ricci Nicomel, Lila Otero-Gonzalez, Adam Williamson, Yong Sik Ok, Pascal Van Der Voort, Tom Hennebel, Gijs Du Laing. Selective copper recovery from ammoniacal waste streams using a systematic biosorption process. Chemosphere. 2021; 286 ():131935.
Chicago/Turabian StyleNina Ricci Nicomel; Lila Otero-Gonzalez; Adam Williamson; Yong Sik Ok; Pascal Van Der Voort; Tom Hennebel; Gijs Du Laing. 2021. "Selective copper recovery from ammoniacal waste streams using a systematic biosorption process." Chemosphere 286, no. : 131935.
Ru catalyst nanoparticles were encapsulated into the pores of a Cr-based metal-organic framework (MOF)—MIL-101. The obtained material, as well as the non-loaded MIL-101, were investigated down to the atomic scale by annular dark-field scanning transmission electron microscopy using low dose conditions and fast image acquisition. The results directly show that the used wet chemistry loading approach is well-fitted for the accurate embedding of the individual catalyst nanoparticles into the cages of the MIL-101. The MIL-101 host material remains crystalline after the loading procedure, and the encapsulated Ru nanoparticles have a metallic nature. Annular dark field scanning transmission electron microscopy, combined with EDX mapping, is a perfect tool to directly characterize both the embedded nanoparticles and the loaded nanoscale MOFs. The resulting nanostructure of the material is promising because the Ru nanoparticles hosted in the MIL-101 pores are prevented from agglomeration—the stability and lifetime of the catalyst could be improved.
Maria Meledina; Geert Watson; Alexander Meledin; Pascal Van Der Voort; Joachim Mayer; Karen Leus. Ru Catalyst Encapsulated into the Pores of MIL-101 MOF: Direct Visualization by TEM. Materials 2021, 14, 4531 .
AMA StyleMaria Meledina, Geert Watson, Alexander Meledin, Pascal Van Der Voort, Joachim Mayer, Karen Leus. Ru Catalyst Encapsulated into the Pores of MIL-101 MOF: Direct Visualization by TEM. Materials. 2021; 14 (16):4531.
Chicago/Turabian StyleMaria Meledina; Geert Watson; Alexander Meledin; Pascal Van Der Voort; Joachim Mayer; Karen Leus. 2021. "Ru Catalyst Encapsulated into the Pores of MIL-101 MOF: Direct Visualization by TEM." Materials 14, no. 16: 4531.
Eu(iii)-Centered periodic mesoporous organosilicas with picolinic acid as the ‘antenna effect’ ligand have been utilized for metal ion sensing (Fe3+, Co2 + and Cu2+) as well as pH sensing in alkaline environments.
Wanlu Liu; Anna M. Kaczmarek; Hannes Rijckaert; Pascal Van Der Voort; Rik Van Deun. Chemical sensors based on a Eu(iii)-centered periodic mesoporous organosilica hybrid material using picolinic acid as an efficient secondary ligand. Dalton Transactions 2021, 50, 11061 -11070.
AMA StyleWanlu Liu, Anna M. Kaczmarek, Hannes Rijckaert, Pascal Van Der Voort, Rik Van Deun. Chemical sensors based on a Eu(iii)-centered periodic mesoporous organosilica hybrid material using picolinic acid as an efficient secondary ligand. Dalton Transactions. 2021; 50 (32):11061-11070.
Chicago/Turabian StyleWanlu Liu; Anna M. Kaczmarek; Hannes Rijckaert; Pascal Van Der Voort; Rik Van Deun. 2021. "Chemical sensors based on a Eu(iii)-centered periodic mesoporous organosilica hybrid material using picolinic acid as an efficient secondary ligand." Dalton Transactions 50, no. 32: 11061-11070.
A gallium-based metal–organic framework, post-modified with MoO2Cl2, was examined as a catalyst for the room temperature liquid-phase photooxidation of α‐ and β-pinene in the presence of molecular oxygen as the oxidant. For both substrates, (α, β)-pinene oxide was formed as the sole product due to the oxygen atom transfer process. Peroxo-molybdenum species was identified in the reoxidation process using infrared spectroscopy. Moreover, a comparison of the structure of the catalyst before and after catalysis by means of X-ray powder diffraction (XRPD), infrared spectroscopy (IR) and N2 adsorption–desorption measurements demonstrated the high recyclability and potential of this catalyst in the photocatalytic epoxidation process of terpenes.
Nelson J. Castellanos; Henry Martínez Q; Fernando Martínez O; Karen Leus; Pascal Van Der Voort. Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework. Research on Chemical Intermediates 2021, 1 -18.
AMA StyleNelson J. Castellanos, Henry Martínez Q, Fernando Martínez O, Karen Leus, Pascal Van Der Voort. Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework. Research on Chemical Intermediates. 2021; ():1-18.
Chicago/Turabian StyleNelson J. Castellanos; Henry Martínez Q; Fernando Martínez O; Karen Leus; Pascal Van Der Voort. 2021. "Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework." Research on Chemical Intermediates , no. : 1-18.
C2/C1 hydrocarbon separation is an important industrial process that relies on energy-intensive cryogenic distillation methods. The use of porous adsorbents to selectively separate these gases is a viable alternative. Highly stable covalent triazine frameworks (urea-CTFs) have been synthesized using 1,3-bis(4-cyanophenyl)urea. Urea-CTFs exhibited gas uptakes of C2H2 (3.86 mmol/g) and C2H4 (2.92 mmol/g) at 273 K and 1 bar and is selective over CH4. Breakthrough simulations show the potential of urea-CTFs for C2/C1 separation.
Chidharth Krishnaraj; Himanshu Jena; Florence Lecoeuvre; Karen Leus; Pascal Van Der Voort. Rigid Nanoporous Urea-Based Covalent Triazine Frameworks for C2/C1 and CO2/CH4 Gas Separation. Molecules 2021, 26, 3670 .
AMA StyleChidharth Krishnaraj, Himanshu Jena, Florence Lecoeuvre, Karen Leus, Pascal Van Der Voort. Rigid Nanoporous Urea-Based Covalent Triazine Frameworks for C2/C1 and CO2/CH4 Gas Separation. Molecules. 2021; 26 (12):3670.
Chicago/Turabian StyleChidharth Krishnaraj; Himanshu Jena; Florence Lecoeuvre; Karen Leus; Pascal Van Der Voort. 2021. "Rigid Nanoporous Urea-Based Covalent Triazine Frameworks for C2/C1 and CO2/CH4 Gas Separation." Molecules 26, no. 12: 3670.
We clicked a salen ligand onto a thiol-ethane bridged periodic mesoporous organosilica (Salen-PMO) using a photo-initiated thiol-ene click reaction. This process resulted in a covalently bonded salen ligand on the PMO material. The final BET surface area amounts 511 m2/g and the pore size diameter is approximately 7 nm. The functionalized PMO material showed an excellent carbon dioxide uptake capacity of 1.29 mmol/g at 273 K and 1 bar. More importantly, by coordinating a MoO22+ complex onto the Salen-PMO material, we obtained a heterogeneous catalyst with a good catalytic performance for the epoxidation of cyclohexene. The catalyst was highly reusable, as no decrease in its activity was observed for at least four runs (99% conversion). Finally, the metal-free Salen-PMO showed an exceptional catalytic performance in the cycloaddition of CO2 to epoxides. The obtained results clearly demonstrate the versatility of the Salen-PMO material not only as metal-free catalyst but also as a support material to anchor metal complexes for specific catalytic applications. With the same catalytic platform, we were able to firstly create epoxides out of alkenes, and subsequently turn these epoxides into cyclic carbonates, consuming CO2.
Mahdieh Haghighat; Karen Leus; Farhad Shirini; Pascal Van Der Voort. Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO 2 Insertion. Chemistry – An Asian Journal 2021, 16, 2126 -2135.
AMA StyleMahdieh Haghighat, Karen Leus, Farhad Shirini, Pascal Van Der Voort. Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO 2 Insertion. Chemistry – An Asian Journal. 2021; 16 (15):2126-2135.
Chicago/Turabian StyleMahdieh Haghighat; Karen Leus; Farhad Shirini; Pascal Van Der Voort. 2021. "Salen‐decorated Periodic Mesoporous Organosilica: From Metal‐assisted Epoxidation to Metal‐free CO 2 Insertion." Chemistry – An Asian Journal 16, no. 15: 2126-2135.
Extensive research has been carried on the molecular adsorption in high surface area materials such as carbonaceous materials and MOFs as well as atomic bonded hydrogen in metals and alloys. Clathrates stand among the ones to be recently suggested for hydrogen storage. Although, the simulations predict lower capacity than the expected by the DOE norms, the additional benefits of clathrates such as low production and operational cost, fully reversible reaction, environmentally benign nature, low risk of flammability make them one of the most promising materials to be explored in the next decade. The inherent ability to tailor the properties of clathrates using techniques such as addition of promoter molecules, use of porous supports and formation of novel reverse micelles morphology provide immense scope customisation and growth. As rapidly evolving materials, clathrates promise to get as close as possible in the search of “holy grail” of hydrogen storage. This review aims to provide the audience with the background of the current developments in the solid-state hydrogen storage materials, with a special focus on the hydrogen clathrates. The in-depth analysis of the hydrogen clathrates will be provided beginning from their discovery, various additives utilised to enhance their thermodynamic and kinetic properties, challenges in the characterisation of hydrogen in clathrates, theoretical developments to justify the experimental findings and the upscaling opportunities presented by this system. The review will present state of the art in the field and also provide a global picture for the path forward.
Anshul Gupta; Gino V. Baron; Patrice Perreault; Silvia Lenaerts; Radu-George Ciocarlan; Pegie Cool; Paulo G.M. Mileo; Sven Rogge; Veronique Van Speybroeck; Geert Watson; Pascal Van Der Voort; Maarten Houlleberghs; Eric Breynaert; Johan Martens; Joeri F.M. Denayer. Hydrogen Clathrates: Next Generation Hydrogen Storage Materials. Energy Storage Materials 2021, 41, 69 -107.
AMA StyleAnshul Gupta, Gino V. Baron, Patrice Perreault, Silvia Lenaerts, Radu-George Ciocarlan, Pegie Cool, Paulo G.M. Mileo, Sven Rogge, Veronique Van Speybroeck, Geert Watson, Pascal Van Der Voort, Maarten Houlleberghs, Eric Breynaert, Johan Martens, Joeri F.M. Denayer. Hydrogen Clathrates: Next Generation Hydrogen Storage Materials. Energy Storage Materials. 2021; 41 ():69-107.
Chicago/Turabian StyleAnshul Gupta; Gino V. Baron; Patrice Perreault; Silvia Lenaerts; Radu-George Ciocarlan; Pegie Cool; Paulo G.M. Mileo; Sven Rogge; Veronique Van Speybroeck; Geert Watson; Pascal Van Der Voort; Maarten Houlleberghs; Eric Breynaert; Johan Martens; Joeri F.M. Denayer. 2021. "Hydrogen Clathrates: Next Generation Hydrogen Storage Materials." Energy Storage Materials 41, no. : 69-107.
One-pot reactions offer economic and environmental advantages. Therefore, the design and synthesis of multifunctional catalysts capable of catalyzing multistep organic transformations are highly important. Herein, an effective bifunctional heterogeneous catalyst is presented. For the first time, the encapsulation of H5PMo10V2O40 (PMoV2) polyoxometalate into the cages of an alkylamine-modified MIL-101 using an optimized double-solvent method is reported. The obtained [email protected] material displays a great catalytic performance (99% conversion of alcohols) for the selective aerobic oxidation-Knoevenagel one-pot reaction. To the best of our knowledge, this is one of the first reports on the usage of noble-metal-free catalysts for the aerobic oxidation-Knoevenagel one-pot reaction without the addition of additives. The catalyst is very stable and can be used for at least five cycles with no leaching of the active sites.
Jiamin Sun; Sara Abednatanzi; Hui Chen; Ying-Ya Liu; Karen Leus; Pascal Van Der Voort. Bifunctional Noble-Metal-Free Catalyst for the Selective Aerobic Oxidation-Knoevenagel One-Pot Reaction: Encapsulation of Polyoxometalates into an Alkylamine-Modified MIL-101 Framework. ACS Applied Materials & Interfaces 2021, 13, 23558 -23566.
AMA StyleJiamin Sun, Sara Abednatanzi, Hui Chen, Ying-Ya Liu, Karen Leus, Pascal Van Der Voort. Bifunctional Noble-Metal-Free Catalyst for the Selective Aerobic Oxidation-Knoevenagel One-Pot Reaction: Encapsulation of Polyoxometalates into an Alkylamine-Modified MIL-101 Framework. ACS Applied Materials & Interfaces. 2021; 13 (20):23558-23566.
Chicago/Turabian StyleJiamin Sun; Sara Abednatanzi; Hui Chen; Ying-Ya Liu; Karen Leus; Pascal Van Der Voort. 2021. "Bifunctional Noble-Metal-Free Catalyst for the Selective Aerobic Oxidation-Knoevenagel One-Pot Reaction: Encapsulation of Polyoxometalates into an Alkylamine-Modified MIL-101 Framework." ACS Applied Materials & Interfaces 13, no. 20: 23558-23566.
An extensive overview on N‐rich antennae used in lanthanide‐based temperature sensing is provided. The investigation of different antennae is required to develop temperature sensors with diverse optical properties and to create a diverse offer for the multiple application fields. For more details see the Review by C. V. Stevens et al. on page 7214 ff.
Flore Vanden Bussche; Dr. Anna M. Kaczmarek; Dr. Veronique Van Speybroeck; Dr. Pascal Van Der Voort; Dr. Christian V. Stevens. Frontispiece: Overview of N‐Rich Antennae Investigated in Lanthanide‐Based Temperature Sensing. Chemistry – A European Journal 2021, 27, 1 .
AMA StyleFlore Vanden Bussche, Dr. Anna M. Kaczmarek, Dr. Veronique Van Speybroeck, Dr. Pascal Van Der Voort, Dr. Christian V. Stevens. Frontispiece: Overview of N‐Rich Antennae Investigated in Lanthanide‐Based Temperature Sensing. Chemistry – A European Journal. 2021; 27 (25):1.
Chicago/Turabian StyleFlore Vanden Bussche; Dr. Anna M. Kaczmarek; Dr. Veronique Van Speybroeck; Dr. Pascal Van Der Voort; Dr. Christian V. Stevens. 2021. "Frontispiece: Overview of N‐Rich Antennae Investigated in Lanthanide‐Based Temperature Sensing." Chemistry – A European Journal 27, no. 25: 1.
Development of a sensitive, reusable, water-dispersible and non-toxic lanthanide-functionalized covalent triazine framework as a molecular thermometer for biological thermometric applications.
Parviz Gohari Derakhshandeh; Sara Abednatanzi; Laurens Bourda; Sasanka Dalapati; Anatolii Abalymov; Maria Meledina; Ying-Ya Liu; Andre G. Skirtach; Kristof Van Hecke; Anna Marta Kaczmarek; Pascal Van Der Voort. A lanthanide-functionalized covalent triazine framework as a physiological molecular thermometer. Journal of Materials Chemistry C 2021, 1 .
AMA StyleParviz Gohari Derakhshandeh, Sara Abednatanzi, Laurens Bourda, Sasanka Dalapati, Anatolii Abalymov, Maria Meledina, Ying-Ya Liu, Andre G. Skirtach, Kristof Van Hecke, Anna Marta Kaczmarek, Pascal Van Der Voort. A lanthanide-functionalized covalent triazine framework as a physiological molecular thermometer. Journal of Materials Chemistry C. 2021; ():1.
Chicago/Turabian StyleParviz Gohari Derakhshandeh; Sara Abednatanzi; Laurens Bourda; Sasanka Dalapati; Anatolii Abalymov; Maria Meledina; Ying-Ya Liu; Andre G. Skirtach; Kristof Van Hecke; Anna Marta Kaczmarek; Pascal Van Der Voort. 2021. "A lanthanide-functionalized covalent triazine framework as a physiological molecular thermometer." Journal of Materials Chemistry C , no. : 1.
In this review, the challenges of COF synthesis are tackled. Discussion of mechanistic studies and improved synthetic methods pave the way for high quality materials and an increased understanding of the underlying chemistry.
Laurens Bourda; Chidharth Krishnaraj; Pascal Van Der Voort; Kristof Van Hecke. Conquering the crystallinity conundrum: efforts to increase quality of covalent organic frameworks. Materials Advances 2021, 2, 2811 -2845.
AMA StyleLaurens Bourda, Chidharth Krishnaraj, Pascal Van Der Voort, Kristof Van Hecke. Conquering the crystallinity conundrum: efforts to increase quality of covalent organic frameworks. Materials Advances. 2021; 2 (9):2811-2845.
Chicago/Turabian StyleLaurens Bourda; Chidharth Krishnaraj; Pascal Van Der Voort; Kristof Van Hecke. 2021. "Conquering the crystallinity conundrum: efforts to increase quality of covalent organic frameworks." Materials Advances 2, no. 9: 2811-2845.
EPR spectra of V-doped DUT-5(Al) reveal four types of paramagnetic dopant species. Spin-Hamiltonian analysis and spectrum decomposition as function of V-content are supplemented with structural information from other spectroscopic techniques.
Kwinten Maes; Lisa I. D. J. Martin; Samira Khelifi; Alexander Hoffman; Karen Leus; Pascal Van Der Voort; Etienne Goovaerts; Philippe F. Smet; Veronique Van Speybroeck; Freddy Callens; Henk Vrielinck. Identification of vanadium dopant sites in the metal–organic framework DUT-5(Al). Physical Chemistry Chemical Physics 2021, 23, 7088 -7100.
AMA StyleKwinten Maes, Lisa I. D. J. Martin, Samira Khelifi, Alexander Hoffman, Karen Leus, Pascal Van Der Voort, Etienne Goovaerts, Philippe F. Smet, Veronique Van Speybroeck, Freddy Callens, Henk Vrielinck. Identification of vanadium dopant sites in the metal–organic framework DUT-5(Al). Physical Chemistry Chemical Physics. 2021; 23 (12):7088-7100.
Chicago/Turabian StyleKwinten Maes; Lisa I. D. J. Martin; Samira Khelifi; Alexander Hoffman; Karen Leus; Pascal Van Der Voort; Etienne Goovaerts; Philippe F. Smet; Veronique Van Speybroeck; Freddy Callens; Henk Vrielinck. 2021. "Identification of vanadium dopant sites in the metal–organic framework DUT-5(Al)." Physical Chemistry Chemical Physics 23, no. 12: 7088-7100.
The prospect of introducing tunable electric conductivity in metal–organic coordination polymers is of high interest for nanoelectronic applications. As the electronic properties of these materials are strongly dependent on their microstructure, the assembly of coordination polymers into thin films with well-controlled growth direction and thickness is crucial for practical devices. Here, we report the deposition of one-dimensional (1D) coordination polymer thin films of N,N′-dimethyl dithiooxamidato-copper by atomic/molecular layer deposition. High out-of-plane ordering is observed in the resulting thin films suggesting the formation of a well-ordered secondary structure by the parallel alignment of the 1D polymer chains. We show that the electrical conductivity of the thin films is highly dependent on their oxidation state. The as-deposited films are nearly insulating with an electrical conductivity below 10–10 S cm–1 with semiconductor-like temperature dependency. Partial reduction with H2 at elevated temperature leads to an increase in the electrical conductivity by 8 orders of magnitude. In the high-conductance state, metallic behavior is observed over the temperature range of 2–300 K. Density functional theory calculations indicate that the metallic behavior originates from the formation of a half-filled energy band intersecting the Fermi level with the conduction pathway formed by the Cu–S–Cu interaction between neighboring polymer chains.
Mikko Nisula; Antti J. Karttunen; Eduardo Solano; Girish C. Tewari; Maarit Karppinen; Matthias Minjauw; Himanshu Sekhar Jena; Pascal Van Der Voort; Dirk Poelman; Christophe Detavernier. Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Doping. ACS Applied Materials & Interfaces 2021, 13, 10249 -10256.
AMA StyleMikko Nisula, Antti J. Karttunen, Eduardo Solano, Girish C. Tewari, Maarit Karppinen, Matthias Minjauw, Himanshu Sekhar Jena, Pascal Van Der Voort, Dirk Poelman, Christophe Detavernier. Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Doping. ACS Applied Materials & Interfaces. 2021; 13 (8):10249-10256.
Chicago/Turabian StyleMikko Nisula; Antti J. Karttunen; Eduardo Solano; Girish C. Tewari; Maarit Karppinen; Matthias Minjauw; Himanshu Sekhar Jena; Pascal Van Der Voort; Dirk Poelman; Christophe Detavernier. 2021. "Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Doping." ACS Applied Materials & Interfaces 13, no. 8: 10249-10256.
A new oxygen-rich porous polymer based on bisvanillonitrile was synthesized and characterized. This polymer was employed as support for the anchoring of 14.5 w% amorphous zirconium oxide nanoparticles. The formation of homogeneously dispersed nanoparticles in the poly-bisvanillonitrile (PBVN) host material was confirmed using N2-sorption, XRPD, XPS and electron microscopy. The combination of zirconium oxide nanoparticles having active adsorption sites with the porous supporting material showed excellent adsorption of arsenic species. The resulting adsorption capacities of the hybrid material extend to 245 mg g−1 for arsenite (AsIII) and 115 mg g−1 for arsenate (AsV). Moreover, adsorption kinetics showed a fast removal of both arsenic species with initial adsorption rate h of 0.0646 mg g−1 min−1 for arsenite and 0.0746 mg g−1 min−1 for arsenate. The immobilization was not interfered by the presence of other compounds in solution, indicating the applicability in real working environments. The material could be regenerated in a continuous mode using a 0.1 mol L−1 sodium hydroxide solution at 70 °C to desorb arsenic.
Bram Seynnaeve; Karel Folens; Chidharth Krishnaraj; Ivan K. Ilic; Clemens Liedel; Johannes Schmidt; An Verberckmoes; Gijs Du Laing; Karen Leus; Pascal Van Der Voort. Oxygen-rich poly-bisvanillonitrile embedded amorphous zirconium oxide nanoparticles as reusable and porous adsorbent for removal of arsenic species from water. Journal of Hazardous Materials 2021, 413, 125356 .
AMA StyleBram Seynnaeve, Karel Folens, Chidharth Krishnaraj, Ivan K. Ilic, Clemens Liedel, Johannes Schmidt, An Verberckmoes, Gijs Du Laing, Karen Leus, Pascal Van Der Voort. Oxygen-rich poly-bisvanillonitrile embedded amorphous zirconium oxide nanoparticles as reusable and porous adsorbent for removal of arsenic species from water. Journal of Hazardous Materials. 2021; 413 ():125356.
Chicago/Turabian StyleBram Seynnaeve; Karel Folens; Chidharth Krishnaraj; Ivan K. Ilic; Clemens Liedel; Johannes Schmidt; An Verberckmoes; Gijs Du Laing; Karen Leus; Pascal Van Der Voort. 2021. "Oxygen-rich poly-bisvanillonitrile embedded amorphous zirconium oxide nanoparticles as reusable and porous adsorbent for removal of arsenic species from water." Journal of Hazardous Materials 413, no. : 125356.
Three nano-sized Periodic Mesoporous Organosilicas (PMOs) were synthesized and post-modification was employed to two PMOs to introduce Ln3+ coordination sites. Two PMOs (DPA-PMO and ePMO) showed characteristic NIR (Nd3+, Yb3+) emission.
Wanlu Liu; Anna M. Kaczmarek; Karel Folens; Gijs Du Laing; Pascal Van Der Voort; Rik Van Deun. Rational design of lanthanide nano periodic mesoporous organosilicas (Ln-nano-PMOs) for near-infrared emission. Dalton Transactions 2021, 50, 2774 -2781.
AMA StyleWanlu Liu, Anna M. Kaczmarek, Karel Folens, Gijs Du Laing, Pascal Van Der Voort, Rik Van Deun. Rational design of lanthanide nano periodic mesoporous organosilicas (Ln-nano-PMOs) for near-infrared emission. Dalton Transactions. 2021; 50 (8):2774-2781.
Chicago/Turabian StyleWanlu Liu; Anna M. Kaczmarek; Karel Folens; Gijs Du Laing; Pascal Van Der Voort; Rik Van Deun. 2021. "Rational design of lanthanide nano periodic mesoporous organosilicas (Ln-nano-PMOs) for near-infrared emission." Dalton Transactions 50, no. 8: 2774-2781.
Herein, a highly N-rich covalent triazine framework (CTF) is applied as support for a RuIII complex. The bipyridine sites within the CTF provide excellent anchoring points for the [Ru(acac)2(CH3CN)2]PF6 complex. The obtained robust [email protected] material was applied for the selective tandem aerobic oxidation–Knoevenagel condensation reaction. The presented system shows a high catalytic performance (>80% conversion of alcohols to α, β-unsaturated nitriles) without the use of expensive noble metals. The bipy-CTF not only acts as the catalyst support but also provides the active sites for both aerobic oxidation and Knoevenagel condensation reactions. This work highlights a new perspective for the development of highly efficient and robust heterogeneous catalysts applying CTFs for cascade catalysis.
Geert Watson; Parviz Gohari Derakhshandeh; Sara Abednatanzi; Johannes Schmidt; Karen Leus; Pascal Van Der Voort. A Ru-Complex Tethered to A N-Rich Covalent Triazine Framework for Tandem Aerobic Oxidation–Knoevenagel Condensation Reactions. Molecules 2021, 26, 838 .
AMA StyleGeert Watson, Parviz Gohari Derakhshandeh, Sara Abednatanzi, Johannes Schmidt, Karen Leus, Pascal Van Der Voort. A Ru-Complex Tethered to A N-Rich Covalent Triazine Framework for Tandem Aerobic Oxidation–Knoevenagel Condensation Reactions. Molecules. 2021; 26 (4):838.
Chicago/Turabian StyleGeert Watson; Parviz Gohari Derakhshandeh; Sara Abednatanzi; Johannes Schmidt; Karen Leus; Pascal Van Der Voort. 2021. "A Ru-Complex Tethered to A N-Rich Covalent Triazine Framework for Tandem Aerobic Oxidation–Knoevenagel Condensation Reactions." Molecules 26, no. 4: 838.
Covalent‐Organic‐Frameworks (COFs) have recently emerged as light‐harvesting devices, as well as elegant heterogeneous catalysts. The combination of these two properties into a dual catalyst has not been explored yet. Here, we report a new photosensitive triazine‐based COF, decorated with single Ni‐sites to form a dual catalyst. This crystalline and highly porous catalyst shows excellent catalytic performance in the visible‐light‐driven catalytic sulfur‐carbon cross‐coupling reaction. The ability to incorporate single transition metal sites in a photosensitive COF scaffold which acts as a two‐component synergistic catalyst in organic transformation is demonstrated for the first time.
Hui Chen; Wanlu Liu; Andreas Laemont; Chidharth Krishnaraj; Xiao Feng; Fadli Rohman; Maria Meledina; QiQi Zhang; Rik Van Deun; Karen Leus; Pascal Van Der Voort. A Visible‐Light‐Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross‐Coupling Dual Catalyst. Angewandte Chemie 2021, 133, 10915 -10922.
AMA StyleHui Chen, Wanlu Liu, Andreas Laemont, Chidharth Krishnaraj, Xiao Feng, Fadli Rohman, Maria Meledina, QiQi Zhang, Rik Van Deun, Karen Leus, Pascal Van Der Voort. A Visible‐Light‐Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross‐Coupling Dual Catalyst. Angewandte Chemie. 2021; 133 (19):10915-10922.
Chicago/Turabian StyleHui Chen; Wanlu Liu; Andreas Laemont; Chidharth Krishnaraj; Xiao Feng; Fadli Rohman; Maria Meledina; QiQi Zhang; Rik Van Deun; Karen Leus; Pascal Van Der Voort. 2021. "A Visible‐Light‐Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross‐Coupling Dual Catalyst." Angewandte Chemie 133, no. 19: 10915-10922.
Covalent‐Organic‐Frameworks (COFs) have recently emerged as light‐harvesting devices, as well as elegant heterogeneous catalysts. The combination of these two properties into a dual catalyst has not been explored yet. Here, we report a new photosensitive triazine‐based COF, decorated with single Ni‐sites to form a dual catalyst. This crystalline and highly porous catalyst shows excellent catalytic performance in the visible‐light‐driven catalytic sulfur‐carbon cross‐coupling reaction. The ability to incorporate single transition metal sites in a photosensitive COF scaffold which acts as a two‐component synergistic catalyst in organic transformation is demonstrated for the first time.
Hui Chen; Wanlu Liu; Andreas Laemont; Chidharth Krishnaraj; Xiao Feng; Fadli Rohman; Maria Meledina; QiQi Zhang; Rik Van Deun; Karen Leus; Pascal Van Der Voort. A Visible‐Light‐Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross‐Coupling Dual Catalyst. Angewandte Chemie International Edition 2021, 60, 10820 -10827.
AMA StyleHui Chen, Wanlu Liu, Andreas Laemont, Chidharth Krishnaraj, Xiao Feng, Fadli Rohman, Maria Meledina, QiQi Zhang, Rik Van Deun, Karen Leus, Pascal Van Der Voort. A Visible‐Light‐Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross‐Coupling Dual Catalyst. Angewandte Chemie International Edition. 2021; 60 (19):10820-10827.
Chicago/Turabian StyleHui Chen; Wanlu Liu; Andreas Laemont; Chidharth Krishnaraj; Xiao Feng; Fadli Rohman; Maria Meledina; QiQi Zhang; Rik Van Deun; Karen Leus; Pascal Van Der Voort. 2021. "A Visible‐Light‐Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur–Carbon Cross‐Coupling Dual Catalyst." Angewandte Chemie International Edition 60, no. 19: 10820-10827.
The market share of noncontact temperature sensors is expending due to fast technological and medical evolutions. In the wide variety of noncontact sensors, lanthanide‐based temperature sensors stand out. They benefit from high photostability, relatively long decay times and high quantum yields. To circumvent their low molar light absorption, the incorporation of a light‐harvesting antenna is required. This review provides an overview of the nitrogen‐rich antennae in lanthanide‐based temperature sensors, emitting in the visible light spectrum, and discuss their temperature sensor ability. The N‐rich ligands are incorporated in many different platforms. The investigation of different antennae is required to develop temperature sensors with diverse optical properties and to create a diverse offer for the multiple application fields. First the molecular probes, consisting of small molecules, are discussed. Furthermore, the thermometer properties of ratiometric temperature sensors, based on di‐ and polynuclear complexes, metal‐organic‐frameworks, periodic mesoporous organosilicas and porous organic polymers, are summarized. The antenna mainly determines the application potential of the ratiometric thermometer. It can be observed that molecular probes are operational in the broad physiological range, metal‐organic‐frameworks are generally very useful in the cryogenic region, periodic mesoporous organosilica show temperature dependency in the physiological range and porous organic polymers are operative in the cryogenic to medium temperature range.
Flore Vanden Bussche; Anna M. Kaczmarek; Veronique Van Speybroeck; Pascal Van Der Voort; Christian V. Stevens. Overview of N‐Rich Antennae Investigated in Lanthanide‐Based Temperature Sensing. Chemistry – A European Journal 2021, 27, 7214 -7230.
AMA StyleFlore Vanden Bussche, Anna M. Kaczmarek, Veronique Van Speybroeck, Pascal Van Der Voort, Christian V. Stevens. Overview of N‐Rich Antennae Investigated in Lanthanide‐Based Temperature Sensing. Chemistry – A European Journal. 2021; 27 (25):7214-7230.
Chicago/Turabian StyleFlore Vanden Bussche; Anna M. Kaczmarek; Veronique Van Speybroeck; Pascal Van Der Voort; Christian V. Stevens. 2021. "Overview of N‐Rich Antennae Investigated in Lanthanide‐Based Temperature Sensing." Chemistry – A European Journal 27, no. 25: 7214-7230.