Mesomorphism and Photophysics of Some Metallomesogens Based on Hexasubstituted 2,2′:6′, 2′′‐Terpyridines |
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| Authors: | Dr N S Saleesh Kumar Marsel Z Shafikov Dr Adrian C Whitwood Dr Bertrand Donnio Dr Peter B Karadakov Dr Valery N Kozhevnikov Prof?Dr Duncan W Bruce |
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| Institution: | 1. Department of Chemistry, University of York, Heslington, York, UK;2. Department of TOS, Institute of Chemical Engineering, Ural Federal University, Ekaterinburg, Russia;3. Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg (UMR 7504), Strasbourg Cedex 2, France;4. Department of Applied Sciences, Northumbria University, Newcastle-Upon-Tyne, UK |
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| Abstract: | The luminescent and mesomorphic properties of a series of metal complexes based on hexacatenar 2,2′:6′,2′′‐terpyridines are investigated using experimental methods and density functional theory (DFT). Two types of ligand are examined, namely 5,5′′‐di(3,4,5‐trialkoxyphenyl)terpyridine with or without a fused cyclopentene ring on each pyridine and their complexes were prepared with the following transition metals: ZnII, CoIII, RhIII, IrIII, EuIII and DyIII. The exact geometry of some of these complexes was determined by single X‐ray diffraction. All complexes with long alkyl chains were found to be liquid crystalline, which property was induced on complexation. The liquid‐crystalline behaviour of the complexes was studied by polarising optical microscopy and small‐angle X‐ray diffraction. Some of the transition metal complexes (for example, those with ZnII and IrIII) are luminescent in solution, the solid state and the mesophase; their photophysical properties were studied both experimentally and using DFT methods (M06‐2X and B3LYP). |
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| Keywords: | emissive materials liquid crystals metallomesogens photophysics terpyridine |
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