The bipyridine adducts of N-phenyldithiocarbamato complexes of Zn(II) and Cd(II); synthesis, spectral, thermal decomposition studies and use as precursors for ZnS and CdS nanoparticles

Abstract

Bipyridine adducts of N-phenyldithiocarbamato complexes, [ML12L2] (M=Cd(II), Zn(II); L1=N-phenyldithiocarbamate, L2=2,2′ bipyridine), have been synthesized and characterised. The decomposition of these complexes to metal sulphides has been investigated by thermogravimetric analysis (TGA). The complexes were used as single-source precursors to synthesize MS (M=Zn, Cd) nanoparticles (NPs) passivated by hexadecyl amine (HDA). The growth of the nanoparticles was carried out at two different temperatures: 180 and 220°C, and the optical and structural properties of the nanoparticles were studied using UV–Vis spectroscopy, photoluminescence spectroscopy (PL), transmission emission microscopy (TEM) and powdered X-ray diffraction (p-XRD). Nanoparticles, whose average diameters are 2.90 and 3.54nm for ZnS, and 8.96 and 9.76nm for CdS grown at 180 and 220°C respectively, were obtained.