Influence of Lewis Bases on the Mesogenic and Luminescent Properties of Homogeneous Films of Europium(III) Tris(β-diketonate) Adducts

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• 作者：Andrey A. Knyazev ; Maksim E. Karyakin ; Ksenia A. Romanova ; Benoî ; t Heinrich ; Bertrand Donnio and Yuriy G. Galyametdinov
• 刊名：European Journal of Inorganic Chemistry
• 出版年：2017
• 出版时间：January 18, 2017
• 年：2017
• 卷：2017
• 期：3
• 页码：639-645
• 全文大小：2052K
• ISSN：1099-0682c

文摘

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.