Platinum(II)–dithiocarbamate complexes with phosphines: Synthesis, characterization and precursor for Pt nanoparticles using ultrasound assisted method

The reaction between Na 2 [PtCl 4 ] and thymine bisdithiocarbamate (tdtc) in a 2:1 molar ratio (Metal:Ligand) produced a square planar complex called [Pt(tdtc) 2 ]n (1). By reacting [Pt(tdtc) 2 ] n with different phosphine ligands, such as Ph 2 PCH 2 PPh 2 (dppm), Ph 2 PCH 2 CH 2 CH 2 PPh 2 (dppp), and PPh 3 , the complexes [Pt(dtc) 2 (dppm) 2 ] n , [Pt(dtc) 2 (dppp)] n and [Pt(tdtc) 2 (PPh 3 ) 2 ] n were obtained. Various characterization techniques, including FTIR, molar conductivity, 1 H-NMR, and 31 P-NMR, were used to analyze these complexes. The results demonstrated that the tdtc ligand acts as a monodentate ligand, binding to the metal center through the soft sulfur atom in the presence of phosphines and bidentate chelating in the absence of phosphines. Furthermore, the complex [Pt(dtc) 2 (dppp)] n was transformed into platinum nanoparticles (Pt NPs) through the application of ultrasound. The resulting platinum nanoparticles were characterized using UV-Vis, TEM, and XRD.