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).
|Number of pages||6|
|Journal||Journal of Materials Chemistry|
|Publication status||Published - 1994|
ASJC Scopus subject areas
- Materials Science(all)
- Materials Chemistry
- Physical and Theoretical Chemistry