Bis-(N-ethylphenyldithiocarbamato)palladium(II) as molecular precursor for palladium sulfide nanoparticles

Bis( N-ethylphenyldithiocarbamato)palladium(II) was synthesized and characterized by elemental analysis, spectroscopic techniques and single crystal X-ray crystallography. The molecular structure confirmed the N-ethylphenyldithiocarbamato anions coordinated bidentately to the Pd(II) ion through the sulfur atoms and resulted in the formation of a square planar geometry. The complex was used as a single molecule precursor and thermolyzed at three different tem perature to investigate the influence of the thermolysis temperature on the optical and morphological properties of the as-prepared palladium sulfide nanoparticles. The pXRD proved that variation of the thermolysis temperature resulted in palladium sulfide nanoparticles with different diffraction patterns. TEM images showed that nanoparticles with particle sizes of 2.01-2.50 nm, 4.00-4.86 nm and 2.53-4.12 nm were obtained at 160, 200 and 240 degrees C, respectively. This revealed that increase in temperature resulted in larger nanoparticles but as temperature gets higher the particle size distribution becomes non-uniform. SEM micrographs revealed that the nanoparticles have a rough surface with different surface morphologies. The optical band gap (Eg) range between 4.90-5.02 eV and was slightly increased when the temperature was increased. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The synthesis and characterization of Bis(N-ethylphenyldithiocarbamato)palladium(II) and its thermal decomposition products, palladium sulfide nanoparticles, revealed a relationship between temperature and the optical and morphological properties of the nanoparticles. Higher temperatures resulted in larger nanoparticles with non-uniform size distribution, showing rough surface morphologies. The optical band gap of the nanoparticles increased slightly with temperature.