Mesomorphism and Photophysics of Some Metallomesogens Based on Hexasubstituted 2,2':6', 2''-Terpyridines

Kumar, N.S. Saleesh, Shafikov, Marzel, Whitwood, Adrian, Donnio, Bertrand, Karadakov, Peter, Kozhevnikov, Valery and Bruce, Duncan (2016) Mesomorphism and Photophysics of Some Metallomesogens Based on Hexasubstituted 2,2':6', 2''-Terpyridines. Chemistry - A European Journal, 22 (24). pp. 8215-8233. ISSN 0947-6539

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Official URL: http://dx.doi.org/10.1002/chem.201505072

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).

Item Type: Article
Uncontrolled Keywords: emissive materials; liquid crystals; metallomesogens; photophysics; terpyridine
Subjects: F100 Chemistry
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Nicola King
Date Deposited: 19 May 2016 13:50
Last Modified: 24 Oct 2017 11:23
URI: http://nrl.northumbria.ac.uk/id/eprint/26875

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