Synthesis, mesomorphism, and luminescent properties of Calamitic 2-Phenylpyridines and their complexes with Platinum(II)

Santoro, A., Whitwood, Adrian C., Williams, J. A. G., Kozhevnikov, Valery and Bruce, D. W. (2009) Synthesis, mesomorphism, and luminescent properties of Calamitic 2-Phenylpyridines and their complexes with Platinum(II). Chemistry of Materials, 21 (16). pp. 3871-3882. ISSN 0897-4756

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Abstract

The liquid crystal and luminescent properties of two related series of rod-like, ortho-platinated complexes bearing a β-diketonate co-ligand are reported. The parent ligands exhibit a rich, smectic polymorphism, but when modified with a fused cyclopentene ring, nematic phases dominate. Reaction of the ligands with tetrachloroplatinate(II) leads to poorly soluble, dimeric complexes that can be cleaved using dimethylsulfoxide; the resulting monomeric complexes are then readily converted to the β-diketonate complexes. All of the complexes are mesomorphic, and the β-diketonate complexes have excited state lifetimes of 27 μs with emission quantum efficiencies exceeding 0.5, the highest yet reported for materials of this type.

Item Type:	Article
Uncontrolled Keywords:	luminescence, liquid crystals, phenylpyridines
Subjects:	H800 Chemical, Process and Energy Engineering
Divisions:	Faculties > Health and Life Sciences > School of Life Sciences > Chemical and Forensic Sciences
Depositing User:	EPrints Services
Date Deposited:	25 Feb 2010 14:12
Last Modified:	22 Feb 2013 10:01
URI:	http://nrl.northumbria.ac.uk/id/eprint/738