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

Abstract

6) have been prepared and characterized by elemental analysis, IR, 1 H, 13 C NMR, HSQC, HMBC and UV-Vis absorption spectra. For the heteroleptic complexes, the thiocyanide n C-N values were shifted to higher wavenumbers and NCS 2 carbon signals were shifted downfield compared to that of homoleptic complexes, suggesting the increased strength of the thioureide bond due to the presence of p-accepting phosphine. Electronic spectral studies suggest square-planar geometry for the complexes. Complex 5 was also characterized by X-ray diffraction techniques and presents a distorted NiS 2 PN square planar configuration around the Ni atom. Rare C-HÁ Á ÁNi intramolecular short contact interactions were observed in the complex 5.The ability of representative complexes 1 and 2 to sense anions (F À , Cl À , Br À and I À ) was examined by UV-Vis absorption spectra and cyclic voltametric titration studies. These studies show that both the complexes prefer to bind with I À . Complex 2 has been used as a single source precursor for the preparation of nickel sulfide and nickel oxide nanoparticles. The as-prepared nickel sulfide and nickel oxide nanoparticles have been characterized by PXRD, SEM, EDAX, TEM, HRTEM, UV-Vis and Photoluminescence spectroscopy. X-ray diffraction analysis showed the presence of three phases (cubic-NiS 2 , cubic-Ni 3 S 4 and rhombohedral-Ni 3 S 2 ). TEM images of nickel oxide revealed that the particles are spherical in shape with diameter B30 nm.

Synthesis and structural studies on Ni(II) dithiocarbamates: Exploring intramolecular Ni⋯H–C interactions

“…The observed planarity extends throughout dithiocarbamate fragments of the ligand backbones, thus showing evidence of delocalization of the π-electrons over the C-S and C-N bonds. This is also supported by the respective bond distances which imply partial double bond character for both C-S and C-N bonds and are similar to other dithiocarbamate complexes[9][10][11][13][14][15][16][17][18][19][20][21]. In the lack of functional groups that would influence in strong directional intermolecular binding, the solid state packing of 1 is seemingly governed by weak van der Waals interactions.…”

“…Transition metal dithiocarbamates are important due their contribution in supramolecular architectures [1], biological significance [2][3][4][5] and industrial applications [6,7]. Most importantly they have found use as single source precursors for metal sulfide nanoparticles and thin films as the solubility, volatility and decomposition properties of these complexes can be tuned by changing the amine substituents [8][9][10][11][12]. Additionally, the advantage of dithiocarbamate complexes is their easy preparation from inexpensive raw materials.…”

Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors

“…Numerous single-source precursor compounds, which already contain a nickel sulfur bond, such as nickel dithiocarbamate [28][29][30][31][32][33][34], dithiocarbonate (xanthate) [35][36][37][38][39][40], thiolate [10,41], dithiooxamide [42], thiourea [43], thiobenzoate [44], thiobiuret [45], mercaptobenzothiazole [46], thiosemicarbazide [47], polysulfide [48], imidodiphosphinate [49] or dithiophosphate [50], have already been investigated for the fabrication of various nickel sulfide nanostructures.…”

Synthesis and characterization of copper(II) dithiocarbamate complexes involving pyrrole and ferrocenyl moieties and their utility for sensing anions and preparation of copper sulfide and copper–iron sulfide nanoparticles

“…N ‐(Pyrrol‐2‐ylmethyl)‐ N ‐butylamine, N ‐(pyrrol‐2‐ylmethyl)‐ N ‐(2‐phenylethyl)amine, N ‐methylferrocenyl‐ N ‐(2‐phenylethyl)amine and N ‐furfuryl‐ N ‐methylferrocenylamine were prepared by general methods reported earlier …”