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Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β‐diketonate) Adducts
Author(s) -
Knyazev Andrey A.,
Karyakin Maksim E.,
Romanova Ksenia A.,
Heinrich Benoît,
Donnio Bertrand,
Galyametdinov Yuriy G.
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201601286
Subject(s) - europium , luminescence , adduct , mesogen , supramolecular chemistry , chemistry , lewis acids and bases , crystallography , tris , lanthanide , molecule , materials science , organic chemistry , ion , polymer , liquid crystalline , catalysis , biochemistry , optoelectronics
A new series of neutral protomesogenic Eu III 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 Eu III 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 Eu III complex are also described.