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We report rare-earth-containing metallomesogens with newly synthesized ligands represented by the β-diketone 1-(4-(4-propylcyclohexyl)phenyl)octane-1,3-dione (CPDk3-5) and the Lewis base 5,5′-bis(heptadecyl)-2,2′-bipyridine (bpy17-17). The stoichiometry of the complexes is [Ln(CPDk3-5)3bpy17-17], where Ln is a trivalent rare-earth ion (La, Sm, Eu, Gd, Tb, Dy, Ho, Tm, and Yb). Although the ligands themselves do not form any mesophase, the respective metal complexes produce nematic and smectic A phases. The mesogenic rare-earth complexes were characterized by NMR, MS, POM, DSC, X-ray diffraction, magnetic susceptibility measurements, and dielectric spectroscopy. The metal complexes display a remarkably large magnetic anisotropy in the mesophase. These nematic liquid crystals can, therefore, be easily aligned by an external low-threshold magnetic field.
Andrey A. Knyazev; Aleksandr S. Krupin; Aleksandr P. Kovshik; Yuriy G. Galyametdinov. Effect of Magnetic and Electric Field on the Orientation of Rare-Earth-Containing Nematics. Inorganic Chemistry 2020, 60, 660 -670.
AMA StyleAndrey A. Knyazev, Aleksandr S. Krupin, Aleksandr P. Kovshik, Yuriy G. Galyametdinov. Effect of Magnetic and Electric Field on the Orientation of Rare-Earth-Containing Nematics. Inorganic Chemistry. 2020; 60 (2):660-670.
Chicago/Turabian StyleAndrey A. Knyazev; Aleksandr S. Krupin; Aleksandr P. Kovshik; Yuriy G. Galyametdinov. 2020. "Effect of Magnetic and Electric Field on the Orientation of Rare-Earth-Containing Nematics." Inorganic Chemistry 60, no. 2: 660-670.
Adducts of Eu(III), Tb(III), Gd(III) and La(III) tris(β-diketonate) forming mesophases in close temperature ranges were synthesized. The near structural features of these lanthanidomesogens render them suitable for obtaining homogeneous binary mixtures that vitrified on cooling into optically isotropic, self-organizing smectic films over a wide range ratio of the lanthanide complexes. The distribution of the components in the obtained films and their supramolecular organization were studied by polarizing optical microscopy, differential scanning calorimetry, and small-angle X-ray scattering. The mixtures behave as their homologous single components and exhibit smectic A and nematic phases above room temperature, and form anisotropic glasses at room temperature. The dependence of the luminescence on the ratio of each component in the mixtures under investigation has been established and a photoexcitation mechanism proposed. It was shown that the luminescence intensity per mole of the emitting substance in films obtained from mixtures of Eu(III) and Tb(III) complexes increases about three fold when compared with the individual Eu(III) complex. This enhancement of the luminescence was interpreted as the consequence of the very effective intermolecular energy transfer from Tb(III) to Eu(III) complexes, templated by the frozen smectic A supramolecular organization. We thus present here an efficient and facile approach for the creation of novel heteroionic lanthanide-containing high uniaxial materials with effective luminescence and controlled spectral properties.
Andrey A. Knyazev; Maksim E. Karyakin; Benoît Heinrich; Bertrand Donnio; Yuriy G. Galyametdinov. A facile approach for the creation of heteroionic lanthanidomesogens-containing uniform films with enhanced luminescence efficiency. Dyes and Pigments 2020, 187, 109050 .
AMA StyleAndrey A. Knyazev, Maksim E. Karyakin, Benoît Heinrich, Bertrand Donnio, Yuriy G. Galyametdinov. A facile approach for the creation of heteroionic lanthanidomesogens-containing uniform films with enhanced luminescence efficiency. Dyes and Pigments. 2020; 187 ():109050.
Chicago/Turabian StyleAndrey A. Knyazev; Maksim E. Karyakin; Benoît Heinrich; Bertrand Donnio; Yuriy G. Galyametdinov. 2020. "A facile approach for the creation of heteroionic lanthanidomesogens-containing uniform films with enhanced luminescence efficiency." Dyes and Pigments 187, no. : 109050.
Uniform luminescent films with high optical quality are promising materials for modern molecular photonics. Such film materials based on β-diketonate complexes of lanthanides have the following application problem: rapid luminescence degradation under UV radiation, low thermostability, poor mechanical properties, and aggregation propensity. An alternative approach to solving these problems is the use of anisometric analogues of β-diketonate compounds of lanthanides (III). The main advantage of such compounds is that they do not crystallize because of long hydrocarbon substituents in the structure of complexes, so they can be used to fabricate thin nano-, micro-, and macroscale uniform film materials by a melt-processing technique at relatively low temperatures, as well as by spin-coating. The method of fabrication of microscale luminescent film materials with controlled optical properties from anisometric analogues of Ln(DBM)3Phen and Ln(bzac)3Phen complexes (Ln = Eu, Tb) is proposed in this paper. Within the framework of this research, we developed original films which are highly uniform and transparent. An important advantage of these films is their high photostability and potential for applications as reusable luminescent sensors and light converters.
Andrey Knyazev; Maxim Karyakin; Yuriy Galyametdinov. Photostable Anisometric Lanthanide Complexes as Promising Materials for Optical Applications. Photonics 2019, 6, 110 .
AMA StyleAndrey Knyazev, Maxim Karyakin, Yuriy Galyametdinov. Photostable Anisometric Lanthanide Complexes as Promising Materials for Optical Applications. Photonics. 2019; 6 (4):110.
Chicago/Turabian StyleAndrey Knyazev; Maxim Karyakin; Yuriy Galyametdinov. 2019. "Photostable Anisometric Lanthanide Complexes as Promising Materials for Optical Applications." Photonics 6, no. 4: 110.
Dmitry V. Lapaev; Victor G. Nikiforov; Vladimir S. Lobkov; Andrey A. Knyazev; Aleksandr S. Krupin; Yuriy G. Galyametdinov. New insights into UV laser irradiation effect on luminescent behavior of vitrified films based on mesogenic lanthanide(III) β-diketonate complexes. Journal of Photochemistry and Photobiology A: Chemistry 2019, 382, 1 .
AMA StyleDmitry V. Lapaev, Victor G. Nikiforov, Vladimir S. Lobkov, Andrey A. Knyazev, Aleksandr S. Krupin, Yuriy G. Galyametdinov. New insights into UV laser irradiation effect on luminescent behavior of vitrified films based on mesogenic lanthanide(III) β-diketonate complexes. Journal of Photochemistry and Photobiology A: Chemistry. 2019; 382 ():1.
Chicago/Turabian StyleDmitry V. Lapaev; Victor G. Nikiforov; Vladimir S. Lobkov; Andrey A. Knyazev; Aleksandr S. Krupin; Yuriy G. Galyametdinov. 2019. "New insights into UV laser irradiation effect on luminescent behavior of vitrified films based on mesogenic lanthanide(III) β-diketonate complexes." Journal of Photochemistry and Photobiology A: Chemistry 382, no. : 1.
Andrey Knyazev; A. S. Krupin; W. Haase; Yu. G. Galyametdinov. Polarized Luminescence of Alighned Lanthanide Containing Nematic Mixtures. Liquid Crystals and their Application 2019, 19, 31 -39.
AMA StyleAndrey Knyazev, A. S. Krupin, W. Haase, Yu. G. Galyametdinov. Polarized Luminescence of Alighned Lanthanide Containing Nematic Mixtures. Liquid Crystals and their Application. 2019; 19 (2):31-39.
Chicago/Turabian StyleAndrey Knyazev; A. S. Krupin; W. Haase; Yu. G. Galyametdinov. 2019. "Polarized Luminescence of Alighned Lanthanide Containing Nematic Mixtures." Liquid Crystals and their Application 19, no. 2: 31-39.
A new film material capable of transforming UV radiation into visible light was obtained from a highly anisometric EuIII complex with organic ligands in a polymethylmethacrylate (PMMA) matrix and then structurally characterized. An important advantage of the synthesized complex is its good solubility in organic solvents such as dichloromethane, chloroform, THF, toluene, etc. The ligand environment (flexible alkyl and cyclohexyl substituents) of the EuIII complex was selected to prevent crystallization, to inhibit the formation of defects in the structure of films and to provide its uniform distribution in the polymer during polymerization. As a result we obtain an EuIII complex of the film with remarkable thermal behavior: the complex melts to isotropic liquid without decomposition, it supercools at ambient temperature and it forms a stable amorphous material at low (up to −30°C) temperatures. The films were prepared by two methods: bulk polymerization and spin coating. A comparison of the differences of luminescent and optical characteristics of micro- and nanosized PMMA films doped with the anisometric EuIII complex is given. Based on X-ray powder diffraction and small-angle scattering data, it has been supposed that the association of EuIII complex molecules occurs in the voids of the PMMA matrix and is accompanied by the formation of a nanocrystalline phase. For films obtained by spin coating, a deeper microphase separation is demonstrated than by bulk polymerization. The dimensional characteristics of the nano-associates were determined and a correlation between the method of preparation and the type of distribution of the EuIII complex in the PMMA matrix is established.
Andrey Knyazev; Aleksandr Krupin; Aidar Gubaidullin; Yury Galyametdinov. Optical and structural characteristics of PMMA films doped with a new anisometric EuIII complex. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 2019, 75, 570 -577.
AMA StyleAndrey Knyazev, Aleksandr Krupin, Aidar Gubaidullin, Yury Galyametdinov. Optical and structural characteristics of PMMA films doped with a new anisometric EuIII complex. Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials. 2019; 75 (4):570-577.
Chicago/Turabian StyleAndrey Knyazev; Aleksandr Krupin; Aidar Gubaidullin; Yury Galyametdinov. 2019. "Optical and structural characteristics of PMMA films doped with a new anisometric EuIII complex." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 75, no. 4: 570-577.
An analysis of the prospects for creating new luminescent molecular photonics materials based on mesogenic lanthanide(III) β-diketonate complexes is presented. We consider vitrified films that combine intense monochromatic luminescence, high optical quality, and complete resistance to UV radiation with the ability to change their photophysical properties (for example, the absorption band width and luminescence intensity) depending on the local structure and under external actions, such as UV radiation and temperature. The problems of control of the photophysical properties of these films and the possibility of their application as working media of high-tech luminescent materials and devices (for example, luminescent sensors of temperature, oxygen, and UV radiation, as well as light-conversion materials) are discussed.
D. V. Lapaev; V. G. Nikiforov; V. S. Lobkov; Andrey Knyazev; Yu. G. Galyametdinov. A New Strategy to Design Photostable Luminescent Materials Based on Lanthanide(III) β-Diketonate Complexes for Advanced Photonic Applications. Optics and Spectroscopy 2019, 126, 34 -40.
AMA StyleD. V. Lapaev, V. G. Nikiforov, V. S. Lobkov, Andrey Knyazev, Yu. G. Galyametdinov. A New Strategy to Design Photostable Luminescent Materials Based on Lanthanide(III) β-Diketonate Complexes for Advanced Photonic Applications. Optics and Spectroscopy. 2019; 126 (1):34-40.
Chicago/Turabian StyleD. V. Lapaev; V. G. Nikiforov; V. S. Lobkov; Andrey Knyazev; Yu. G. Galyametdinov. 2019. "A New Strategy to Design Photostable Luminescent Materials Based on Lanthanide(III) β-Diketonate Complexes for Advanced Photonic Applications." Optics and Spectroscopy 126, no. 1: 34-40.
Experiments on recording the ultrafast optical Kerr effect (OKE) in solution of europium(III) β‑diketonate complexes in toluene at a concentration of 10–2 mol/L showed that the total OKE signal is not a superposition of two contributions, one of which is related to the vibrational–rotational dynamics of toluene molecules, while the other is due to the vibrational–rotational dynamics of the europium(III) complexes. This immediately indicates that the europium(III) complexes essentially change the structure of liquid toluene, which is reflected in the character of an orientational response in picosecond range.
V. G. Nikiforov; D. K. Zharkov; D. V. Lapaev; Artemiy Shmelev; A. V. Leont’Ev; V. S. Lobkov; Andrey Knyazev; Yu. G. Galyametdinov. Influence of Europium(III) β-Diketonate Complex on Orientational Responses in Ultrafast Optical Kerr Effect. Optics and Spectroscopy 2019, 126, 6 -9.
AMA StyleV. G. Nikiforov, D. K. Zharkov, D. V. Lapaev, Artemiy Shmelev, A. V. Leont’Ev, V. S. Lobkov, Andrey Knyazev, Yu. G. Galyametdinov. Influence of Europium(III) β-Diketonate Complex on Orientational Responses in Ultrafast Optical Kerr Effect. Optics and Spectroscopy. 2019; 126 (1):6-9.
Chicago/Turabian StyleV. G. Nikiforov; D. K. Zharkov; D. V. Lapaev; Artemiy Shmelev; A. V. Leont’Ev; V. S. Lobkov; Andrey Knyazev; Yu. G. Galyametdinov. 2019. "Influence of Europium(III) β-Diketonate Complex on Orientational Responses in Ultrafast Optical Kerr Effect." Optics and Spectroscopy 126, no. 1: 6-9.
A highly efficient sensing element based on a photostable vitrified film of the terbium(iii) β-diketonate complex for reusable luminescent thermometers suitable for long-term monitoring in the range of 143–253 K.
Dmitry V. Lapaev; Victor G. Nikiforov; Vladimir S. Lobkov; Andrey A. Knyazev; Yuriy Galyametdinov. A photostable vitrified film based on a terbium(iii) β-diketonate complex as a sensing element for reusable luminescent thermometers. Journal of Materials Chemistry C 2018, 6, 9475 -9481.
AMA StyleDmitry V. Lapaev, Victor G. Nikiforov, Vladimir S. Lobkov, Andrey A. Knyazev, Yuriy Galyametdinov. A photostable vitrified film based on a terbium(iii) β-diketonate complex as a sensing element for reusable luminescent thermometers. Journal of Materials Chemistry C. 2018; 6 (35):9475-9481.
Chicago/Turabian StyleDmitry V. Lapaev; Victor G. Nikiforov; Vladimir S. Lobkov; Andrey A. Knyazev; Yuriy Galyametdinov. 2018. "A photostable vitrified film based on a terbium(iii) β-diketonate complex as a sensing element for reusable luminescent thermometers." Journal of Materials Chemistry C 6, no. 35: 9475-9481.
An 18-fold increase in the mean luminescence intensity of Tb3+ ions in a vitrified film of a terbium( III) β-diketonate complex under UV laser radiation in atmospheric oxygen at 300 K was observed. Luminescence and Raman spectroscopy data reveal that the observed effect was caused by photophysical and photochemical processes changing the geometry and structure of the complex.
D. V. Lapaev; V. G. Nikiforov; V. S. Lobkov; Andrey Knyazev; Yu. G. Galyametdinov; K. L. Shukhina. Effect of Photochemical and Photophysical Processes with the Participation of Oxygen on the Luminescent Properties of a Film of a Terbium(III) β-Diketonate Complex. Bulletin of the Russian Academy of Sciences: Physics 2018, 82, 1022 -1026.
AMA StyleD. V. Lapaev, V. G. Nikiforov, V. S. Lobkov, Andrey Knyazev, Yu. G. Galyametdinov, K. L. Shukhina. Effect of Photochemical and Photophysical Processes with the Participation of Oxygen on the Luminescent Properties of a Film of a Terbium(III) β-Diketonate Complex. Bulletin of the Russian Academy of Sciences: Physics. 2018; 82 (8):1022-1026.
Chicago/Turabian StyleD. V. Lapaev; V. G. Nikiforov; V. S. Lobkov; Andrey Knyazev; Yu. G. Galyametdinov; K. L. Shukhina. 2018. "Effect of Photochemical and Photophysical Processes with the Participation of Oxygen on the Luminescent Properties of a Film of a Terbium(III) β-Diketonate Complex." Bulletin of the Russian Academy of Sciences: Physics 82, no. 8: 1022-1026.
A. S. Krupin; Andrey Knyazev; Yu. G. Galyametdinov. Lanthanide-Containing Nematic Phases with Controlled Polarized Luminescence at Room Temperature. Liquid Crystals and their Application 2018, 18, 15 -23.
AMA StyleA. S. Krupin, Andrey Knyazev, Yu. G. Galyametdinov. Lanthanide-Containing Nematic Phases with Controlled Polarized Luminescence at Room Temperature. Liquid Crystals and their Application. 2018; 18 (1):15-23.
Chicago/Turabian StyleA. S. Krupin; Andrey Knyazev; Yu. G. Galyametdinov. 2018. "Lanthanide-Containing Nematic Phases with Controlled Polarized Luminescence at Room Temperature." Liquid Crystals and their Application 18, no. 1: 15-23.
Dmitry V. Lapaev; Victor G. Nikiforov; Georgy M. Safiullin; Vladimir S. Lobkov; Andrey A. Knyazev; Aleksandr Krupin; Yuriy Galyametdinov. UV laser-induced enhancement of photoluminescence intensity in vitrified terbium(III) β-diketonate complex film in air. Journal of Luminescence 2018, 194, 407 -413.
AMA StyleDmitry V. Lapaev, Victor G. Nikiforov, Georgy M. Safiullin, Vladimir S. Lobkov, Andrey A. Knyazev, Aleksandr Krupin, Yuriy Galyametdinov. UV laser-induced enhancement of photoluminescence intensity in vitrified terbium(III) β-diketonate complex film in air. Journal of Luminescence. 2018; 194 ():407-413.
Chicago/Turabian StyleDmitry V. Lapaev; Victor G. Nikiforov; Georgy M. Safiullin; Vladimir S. Lobkov; Andrey A. Knyazev; Aleksandr Krupin; Yuriy Galyametdinov. 2018. "UV laser-induced enhancement of photoluminescence intensity in vitrified terbium(III) β-diketonate complex film in air." Journal of Luminescence 194, no. : 407-413.
Dmitry V. Lapaev; Victor G. Nikiforov; Vladimir S. Lobkov; Andrey A. Knyazev; Yuriy Galyametdinov. Reusable temperature-sensitive luminescent material based on vitrified film of europium(III) β-diketonate complex. Optical Materials 2018, 75, 787 -795.
AMA StyleDmitry V. Lapaev, Victor G. Nikiforov, Vladimir S. Lobkov, Andrey A. Knyazev, Yuriy Galyametdinov. Reusable temperature-sensitive luminescent material based on vitrified film of europium(III) β-diketonate complex. Optical Materials. 2018; 75 ():787-795.
Chicago/Turabian StyleDmitry V. Lapaev; Victor G. Nikiforov; Vladimir S. Lobkov; Andrey A. Knyazev; Yuriy Galyametdinov. 2018. "Reusable temperature-sensitive luminescent material based on vitrified film of europium(III) β-diketonate complex." Optical Materials 75, no. : 787-795.
Аndrey А. Knyazev; Aleksandr Krupin; Benoît Heinrich; Bertrand Donnio; Yuriy Galyametdinov. Controlled polarized luminescence of smectic lanthanide complexes. Dyes and Pigments 2018, 148, 492 -500.
AMA StyleАndrey А. Knyazev, Aleksandr Krupin, Benoît Heinrich, Bertrand Donnio, Yuriy Galyametdinov. Controlled polarized luminescence of smectic lanthanide complexes. Dyes and Pigments. 2018; 148 ():492-500.
Chicago/Turabian StyleАndrey А. Knyazev; Aleksandr Krupin; Benoît Heinrich; Bertrand Donnio; Yuriy Galyametdinov. 2018. "Controlled polarized luminescence of smectic lanthanide complexes." Dyes and Pigments 148, no. : 492-500.
The permittivity components of the liquid crystalline gadolinium complex with Lewis bases and β-diketonates as ligands are measured in the frequency range from 100 Hz to 5 MHz. The magnitude and sign of the dielectric anisotropy of the complex are determined. Two dispersion regions of the permittivities are found in the liquid crystalline phase. The mechanisms responsible for the relaxation phenomena occurring in the sample are established. The dielectric relaxation times, activation energies, and dipole moment of the complex are obtained. The results of the study are compared with the dielectric properties of ytterbium and terbium complexes having the same ligand environment.
L. A. Dobrun; A. P. Kovshik; E. I. Ryumtsev; Yu. G. Galyametdinov; Andrey Knyazev. Dielectric properties of gadolinium-based liquid crystalline complex. Crystallography Reports 2017, 62, 753 -757.
AMA StyleL. A. Dobrun, A. P. Kovshik, E. I. Ryumtsev, Yu. G. Galyametdinov, Andrey Knyazev. Dielectric properties of gadolinium-based liquid crystalline complex. Crystallography Reports. 2017; 62 (5):753-757.
Chicago/Turabian StyleL. A. Dobrun; A. P. Kovshik; E. I. Ryumtsev; Yu. G. Galyametdinov; Andrey Knyazev. 2017. "Dielectric properties of gadolinium-based liquid crystalline complex." Crystallography Reports 62, no. 5: 753-757.
The values of optical anisotropy of two series of thermotropic nematic liquid crystalline complexes based on the ions Eu+3, Gd+3, Tb+3, and Dy+3 have been determined. Even–odd alternation of optical anisotropy with an increasing number of protons in ions of lanthanides has been observed. It is established that, in the considered series of lanthanidomesogens, optical anisotropy is more sensitive to changes in the ligand structure of complexes than to the variation of the complexing agent.
L. A. Dobrun; A. P. Kovshik; E. I. Ryumtsev; Yu. G. Galyametdinov; Andrey Knyazev. The even–odd effect in the dependence of optical anisotropy on the number of protons in complexing agent ions of liquid-crystal coordination compounds of lanthanides. Optics and Spectroscopy 2017, 122, 813 -815.
AMA StyleL. A. Dobrun, A. P. Kovshik, E. I. Ryumtsev, Yu. G. Galyametdinov, Andrey Knyazev. The even–odd effect in the dependence of optical anisotropy on the number of protons in complexing agent ions of liquid-crystal coordination compounds of lanthanides. Optics and Spectroscopy. 2017; 122 (5):813-815.
Chicago/Turabian StyleL. A. Dobrun; A. P. Kovshik; E. I. Ryumtsev; Yu. G. Galyametdinov; Andrey Knyazev. 2017. "The even–odd effect in the dependence of optical anisotropy on the number of protons in complexing agent ions of liquid-crystal coordination compounds of lanthanides." Optics and Spectroscopy 122, no. 5: 813-815.
Europium(III) complexes that are the anisometric analogues of a well-known Eu(DBM)3Phen (DBM = dibenzoylmethane; Phen = 1,10-phenanthroline) complex were synthesized. Quantum-chemical calculations of the excited states of new Eu(III) complexes and some conjugated polymers showed that poly(N-vinylcarbazole) provides the most efficient energy transfer in polymer films doped with synthesized Eu(III) complexes. These new composite films were prepared, and their luminescence properties were studied. The results of experimental data confirmed theoretical prediction about significant influence introduced in molecular structure long terminal alkyl chains and cyclohexane on the luminescence efficiency of “Ln(III)–polymer” composite. As the result a substantial contribution of complex anisometry to the luminescence efficiency of composite was revealed due to the increase of the complex limit concentration before self-quenching more than twofold.
Andrey Knyazev; Maksim Karyakin; Aleksandr Krupin; Ksenia A. Romanova; Yuriy Galyametdinov. Influence of Eu(III) Complexes Structural Anisotropy on Luminescence of Doped Conjugated Polymer Blends. Inorganic Chemistry 2017, 56, 6067 -6075.
AMA StyleAndrey Knyazev, Maksim Karyakin, Aleksandr Krupin, Ksenia A. Romanova, Yuriy Galyametdinov. Influence of Eu(III) Complexes Structural Anisotropy on Luminescence of Doped Conjugated Polymer Blends. Inorganic Chemistry. 2017; 56 (11):6067-6075.
Chicago/Turabian StyleAndrey Knyazev; Maksim Karyakin; Aleksandr Krupin; Ksenia A. Romanova; Yuriy Galyametdinov. 2017. "Influence of Eu(III) Complexes Structural Anisotropy on Luminescence of Doped Conjugated Polymer Blends." Inorganic Chemistry 56, no. 11: 6067-6075.
Measurements of the refractive indices and optical anisotropy of a series of liquid crystalline coordination compounds based on lanthanides with an identical ligand environment have been carried out. It was found that the magnitude of the optical anisotropy of the investigated complexes was several times smaller than the anisotropy of organic liquid crystals. Analysis of the results showed that the variation of the ion complexing agent had little effect on the magnitude of the optical anisotropy in the mesogenic complexes containing the same ligands. The even-odd alternation of the optical anisotropy of lanthanidomesogens at the increasing the number of protons in the ions of the lanthanides has been observed.
L. A. Dobrun; A. P. Kovshik; E. I. Ryumtsev; Yuriy Galyametdinov; Andrey Knyazev. The influence of a complexing agent ion on the magnitude of the optical anisotropy of lanthanidomesogens. Physics of the Solid State 2017, 59, 815 -819.
AMA StyleL. A. Dobrun, A. P. Kovshik, E. I. Ryumtsev, Yuriy Galyametdinov, Andrey Knyazev. The influence of a complexing agent ion on the magnitude of the optical anisotropy of lanthanidomesogens. Physics of the Solid State. 2017; 59 (4):815-819.
Chicago/Turabian StyleL. A. Dobrun; A. P. Kovshik; E. I. Ryumtsev; Yuriy Galyametdinov; Andrey Knyazev. 2017. "The influence of a complexing agent ion on the magnitude of the optical anisotropy of lanthanidomesogens." Physics of the Solid State 59, no. 4: 815-819.
A new series of neutral protomesogenic EuIII tris(β-diketonate) adducts with different Lewis bases have been synthesized. Only one of the complexes is liquid-crystalline and displays smectic A and nematic mesomorphism over a broad temperature range. Quantum-chemistry and small-angle X-ray scattering methods have permitted the evaluation of the influence of the structure of the Lewis base on the anisometry of EuIII adduct molecules and their subsequent supramolecular organization. The structural features of the presented compounds allow the creation of vitrified optically isotropic and self-organized films with effective red luminescence. The luminescence spectra of aligned thin films of a liquid-crystalline EuIII complex are also described.
Andrey A. Knyazev; Maksim Karyakin; Ksenia A. Romanova; Benoît Heinrich; Bertrand Donnio; Yuriy G. Galyametdinov. Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β-diketonate) Adducts. European Journal of Inorganic Chemistry 2017, 2017, 639 -645.
AMA StyleAndrey A. Knyazev, Maksim Karyakin, Ksenia A. Romanova, Benoît Heinrich, Bertrand Donnio, Yuriy G. Galyametdinov. Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β-diketonate) Adducts. European Journal of Inorganic Chemistry. 2017; 2017 (3):639-645.
Chicago/Turabian StyleAndrey A. Knyazev; Maksim Karyakin; Ksenia A. Romanova; Benoît Heinrich; Bertrand Donnio; Yuriy G. Galyametdinov. 2017. "Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β-diketonate) Adducts." European Journal of Inorganic Chemistry 2017, no. 3: 639-645.
Andrey Knyazev; A. S. Krupin; W. Haase; Yu. G. Galyametdinov. Polarized Luminescence of Aligned Films Based on Nematic Blends of PFO and Lanthanidomesogen. Liquid Crystals and their Application 2016, 16, 22 -26.
AMA StyleAndrey Knyazev, A. S. Krupin, W. Haase, Yu. G. Galyametdinov. Polarized Luminescence of Aligned Films Based on Nematic Blends of PFO and Lanthanidomesogen. Liquid Crystals and their Application. 2016; 16 (4):22-26.
Chicago/Turabian StyleAndrey Knyazev; A. S. Krupin; W. Haase; Yu. G. Galyametdinov. 2016. "Polarized Luminescence of Aligned Films Based on Nematic Blends of PFO and Lanthanidomesogen." Liquid Crystals and their Application 16, no. 4: 22-26.