Synthesis, Spectral, Cyclic Voltammetric Studies, and Single Crystal X-Ray Structure Determination of the Planar NiS2P2, NiS2PN, and NiS2PC Chromophores

Morphological Studies, Photocatalytic Activity, and Electrochemistry of Platinum Disulfide Nanoparticles from Bis(morpholinyl-4-carbodithioato)-platinum(II)

Bis(morpholinyl-4-carbodithioato)-platinum(II) was synthesized and characterized using spectroscopic techniques and single-crystal X-ray crystallography. The Pt(II) complex crystallized in a monoclinic space group P2₁/n with a Pt(II) ion located on an inversion center coordinated two morpholinyl dithiocarbamate ligands that are coplanar to form a slightly distorted square planar geometry around the Pt(II) ion. The complex was thermolyzed at 120, 180, and 240 °C to prepare PtS₂ nanoparticles. Powder X-ray diffraction patterns confirmed the hexagonal crystalline phase for the as-prepared PtS₂ nanoparticles irrespective of thermolysis temperature. Bead-like shaped PtS₂-120 nanoparticles with a particle size in the range of 12.46-64.97 nm were formed at 120 °C, while PtS₂-180 prepared at 180 °C is quasi-spherical in shape with particles in the range of 24.30-46.87 nm. The PtS₂-240 obtained at 240 °C is spherical with particles in the range of 11.45-46.85 nm. The broad emission maxima of the as-prepared PtS₂ nanoparticles are ascribed to the particles' broad size distributions. The photocatalytic degradation of methylene blue by the PtS₂ nanoparticles shows a maximum efficiency of 87% for PtS₂-240 after 360 min. The effects of photocatalytic dosage, irradiation time, pH medium, and scavengers were also evaluated. Cyclic voltammetry of the PtS₂ nanoparticles showed a reversible redox reaction, while the electrochemistry of the as-prepared PtS₂ indicates that the electron transfer process is diffusion-controlled.

The remarkable propensity for the formation of C–H⋯π(chelate ring) interactions in the crystals of the first-row transition metal dithiocarbamates and the supramolecular architectures they sustain

C–H⋯π(chelate ring) interactions play an important role in assembling first-row transition metal dithiocarbamates in their crystals.

Nickel(ii) dithiocarbamate complexes containing the pyrrole moiety for sensing anions and synthesis of nickel sulfide and nickel oxide nanoparticles

Rare anagostic interaction is observed in (N-(pyrrol-2-ylmethyl)-N-furfuryldithiocarbamato-S,S′)(thiocyanato-N)(triphenylphosphine)nickel(ii). Bis(N-(pyrrol-2-ylmethyl)-N-furfuryldithiocarbamato-S,S′)nickel(ii) is used for the preparation of spherical nickel sulfide and nickel oxide nanoparticles.