摘要 : Reaction of salicyldehyde thiosemicarbazone (H2L1), 2-hydroxyacetophenone thiosemicarbazone (H2L2) and 2-hydroxynapthaidehyde thiosemicarbazone (H2L3) (general abbreviation H2L, where H-2 stands for the two dissociable protons, on... 展开 Reaction of salicyldehyde thiosemicarbazone (H2L1), 2-hydroxyacetophenone thiosemicarbazone (H2L2) and 2-hydroxynapthaidehyde thiosemicarbazone (H2L3) (general abbreviation H2L, where H-2 stands for the two dissociable protons, one phenolic proton and one hydrazinic proton) with K-2[PtCl4] afforded a family of polymeric complexes of type [{Pt(L)}(n)] Reaction of the polymeric species with two monodentate ligands (D), viz. triphenylphosphine (PPh3) and 4-picoline (pic), yielded complexes of the type [Pt(L)(D)]. These mixed-ligand complexes were also obtained from the reaction of the thiosenticarbazones with [Pt(PPh3)(2)Cl-2] and [Pt(pic)(2)Cl-2]. The crystal structure of [Pt(MAL 2)] has been determined. The thiosernicarbazone ligands are coordinated, via dissociation of the two protons, as dianionic tridentate O,N,S-donors. The [Pt(L)(D)] complexes show characteristic H-1 NMR spectra and intense absorptions in the visible and ultraviolet region. They also fluoresce in the visible region at ambient temperature. (C) 2007 Elsevier Ltd. All rights reserved. 收起