Triplet emission in platinum-containing poly(alkynylsilanes)

Wai Yeung Wong, Chun Kin Wong, Guo Liang Lu, Albert Wai Ming Lee, Kok Wai Cheah, Jian Xin Shi

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78 Citations (Scopus)

Abstract

Synthetic routes to novel oligomeric and polymeric platinum(II)-containing alkynylsilanes were developed. Soluble and thermally stable platinum(II) poly(alkynylsilanes) trans-[-Pt(PBu3)2C≡C(p-C6H4)C ≡CSiPh2C≡C(p-C6H4)C≡C-]nwere prepared in good yield by CuI-catalyzed condensation polymerization of trans-[PtCl2(PBu3)2with HC≡C(p-C6H4)C≡CSiPh2C≡C(p-C6H4)C≡CH. The regio-chemical structure of the polymer was studied by NMR (1H,13C,29Si, and31P) spectroscopy. We report the optical absorption and photoluminescence spectra of such metal-based organosilicon polymer and compare the data with their oligomeric model complexes trans-[Pt(Ph)(PEt3)2C≡C(p-C6H4)C≡CSiPh2C≡C(p-C6H4)C≡CPt(Ph) (PEt3)2] and trans-[Pt(Ph)(PEt3)2C≡C(p-C6H4)C≡CSiPh2C≡C(p-C6H4)C≡CPt(PBu3)2C≡C(p-C6H4)C≡CSiPh2C≡C(p-C6H4)C≡CPt(Ph)(PEt3)2]. Our studies indicate that such organometallic poly(alkynylsilanes) show a strong triplet emission with a very high efficiency of intersystem crossing from the S1singlet excited state to the T1triplet excited state. The dependence of intersystem crossing and the spatial extent of singlet and triplet excitons as a function of the central spacer group is discussed in polymetallaynes possessing SiPh2, C6H4and Pt(PR3)2(R = Et, Bu) linkers. The photoconducting properties of such silicon-linked platinum polyyne are described.
Original languageEnglish
Pages (from-to)983-990
Number of pages8
JournalMacromolecules
Volume36
Issue number4
DOIs
Publication statusPublished - 25 Feb 2003
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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