Synthesis and optical spectroscopy of linear long-chain di-terminal alkynes and their Pt-σ-acetylide polymeric complexes

Muhammad S. Khan, Ashok K. Kakkar, Nicholas J. Long, Jack Lewis, Paul Raithby, Paul Nguyen, Todd B. Marder, Felix Wittmann, Richard H. Friend

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Abstract

A variety of straight-chain alkynes with extended π-conjugation through benzene, anthracene and thiophene linker units in the backbone, H-C≡C-R′-C≡C-R-C≡C-R′-C≡C-H (R = p-C 6H4, 9,10-C14H8, 2,5-C 4H2S; R′ = p-C6H4, p-C 6H4-C6H4-p) has been synthesized. The alkynyl chromophores with an anthracene spacer unit are highly emissive in solution with luminescence quantum yields of up to 0.5. The platinum σ-acetylide polymeric complexes of the above ligands show strong absorptions associated with metal-to-alkynyl ligand charge transfer (MLCT) transitions. It is clear that the π-conjugation is maintained through the metal centres and the optical gap for the polymer, [Pt(PBun 3)2-C≡C-p-C6H4-C≡C-9,10- C14H8-C≡C-p-C6H4-C≡C] n is lower than for the complexes [Pt(PBn 3)2-C≡C-R′-C≡C-R-C≡C-R′- C≡C]n (R = p-C6H4, 2,5-C 4H2S; R′ = p-C6H4; p-C 6H4-C6H4-p).

Original languageEnglish
Pages (from-to)1227-1232
Number of pages6
JournalJournal of Materials Chemistry
Volume4
Issue number8
Publication statusPublished - 1994

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ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry
  • Physical and Theoretical Chemistry

Cite this

Khan, M. S., Kakkar, A. K., Long, N. J., Lewis, J., Raithby, P., Nguyen, P., ... Friend, R. H. (1994). Synthesis and optical spectroscopy of linear long-chain di-terminal alkynes and their Pt-σ-acetylide polymeric complexes. Journal of Materials Chemistry, 4(8), 1227-1232.