Self-assembly of luminescent alkynyl-based platinum-cadmium complexes containing auxiliary diimine or terpyridine ligands.

摘要: Reaction of different “Cd(N-N)22+” (N-N = bpy, dmbpy, phen) or “Cd(trpy)2+” fragments with cis- trans- (5) dianionic bis(alkynyl)platinate substrates [Pt(C6F5)2(C≡CR)2]2− (R Ph a, Tol b) leads to the generation novel bimetallic neutral Platinum−Cadmium derivatives, which show photoluminescence (PL) strongly influenced by structure and media. In complexes [cis-Pt(C6F5)2(C≡CR)2Cd(N-N)2] bpy (1), dmbpy (2), phen (3)), cis-bis(alkynyl)platinate fragment interacts “Cd(N-N)2+2” unit mainly through both Cα atoms (d(Cd−Cα) 2.417(5)−2.554(5) A) Pt center (d(Pt−Cd) ∼ 3.10 A); while in [cis-Pt(C6F5)2(C≡CR)2Cd(trpy)] (4), probably because presence only three Cd−N bonds, Pt−Cd interaction is enhanced 3.00 A), Cd(II) atom being additionally solvated acetone H2O. By contrast, [trans-Pt(C6F5)2(C≡CR)2Cd(bpy)2] (6) Cd found be a distorted trigonal-bipyramid coordination, interacting w...