Issue 12, 2002

Synthesis, characterisation and electronic properties of a series of platinum(ii) poly-ynes containing novel thienyl-pyridine linker groups

Abstract

The synthesis and characterisation of a series of novel poly-yne polymers, trans-[–(PnBu3)2Pt(C[triple bond, length as m-dash]C–L–C[triple bond, length as m-dash]C)-]n (L = 2-(2′-thienyl)-pyridine (L1), 2,5-bis(2′-thienyl)pyridine (L2), 6,6′-bis(2″-thienyl)-3,3′-bipyridine (L3)), and the corresponding platinum dimers trans-[(PEt3)2(Ph)Pt(C[triple bond, length as m-dash]CLC[triple bond, length as m-dash]C)Pt(Ph)(PEt3)2] are described. The dimers were prepared by the reaction of two equivalents of trans-[Pt(PEt3)2(Ph)Cl] with one equivalent of the diterminal diyne HC[triple bond, length as m-dash]C–L–C[triple bond, length as m-dash]CH, in CuI catalysed dehydrohalogenation reactions in CH2Cl2–Pri2NH, while the polymers are obtained similarly from the diyne and one equivalent of trans-[Pt(PnBu3)2Cl2]. The optical absorption and photoluminescence spectra of the polymers with L1 and L2 linker groups are reported. The optical gaps are 465 nm (2.67 eV) and 486 nm (2.55 eV), respectively. The photoluminescence spectrum for each polymer exhibits one band at room temperature. At 10 K, low-energy emission bands emerge which are attributed to emission from the triplet excited state. The results of these studies are compared with those obtained for other platinum-containing poly-yne and related organometallic polymers.

Graphical abstract: Synthesis, characterisation and electronic properties of a series of platinum(ii) poly-ynes containing novel thienyl-pyridine linker groups

Supplementary files

Article information

Article type
Paper
Submitted
23 Jan 2002
Accepted
16 Apr 2002
First published
07 May 2002

J. Chem. Soc., Dalton Trans., 2002, 2441-2448

Synthesis, characterisation and electronic properties of a series of platinum(II) poly-ynes containing novel thienyl-pyridine linker groups

M. S. Khan, M. R. A. Al-Mandhary, M. K. Al-Suti, N. Feeder, S. Nahar, A. Köhler, R. H. Friend, P. J. Wilson and P. R. Raithby, J. Chem. Soc., Dalton Trans., 2002, 2441 DOI: 10.1039/B201073A

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