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Electrocatalytic property, anticancer activity, and density functional theory calculation of [NiCl(P^N^P)]Cl.EtOH
Author(s) -
Mohammadnezhad Gholamhossein,
Abad Saeed,
Farrokhpour Hossein,
Görls Helmar,
Plass Winfried
Publication year - 2021
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.6092
Subject(s) - chemistry , ligand (biochemistry) , nickel , density functional theory , pincer movement , pincer ligand , crystallography , monoclinic crystal system , cyclic voltammetry , proton nmr , hydrogen bond , aqueous solution , electrocatalyst , crystal structure , stereochemistry , electrochemistry , molecule , computational chemistry , organic chemistry , catalysis , biochemistry , receptor , electrode
This study describes the electrocatalytic, anticancer, and density functional theory (DFT) studies of a nickel complex, [NiCl(P^N^P)]Cl.EtOH, based on a neutral P^N^P‐type pincer ligand (P^N^P = bis[(2‐diphenylphosphino)ethyl]amine). The ligand was synthesized without time‐consuming and costly amine protection. It was characterized by 1 H NMR, 31 P NMR, Fourier transform infrared (FT‐IR), UV–vis, and single‐crystal X‐ray diffraction. The complex was isolated as a solvated chloride salt and characterized by FT‐IR, UV–visible, 1 H NMR, 13 C NMR, and 31 P NMR spectroscopies as well as single‐crystal X‐ray diffraction and CHN analysis. The ligand and complex crystallized in a monoclinic P 2 1 / c space group. The molecular structure of the complex contains a four‐coordinated distorted nickel ion with square‐planar geometry. The electrocatalytic hydrogen ion reduction was studied for the nickel complex in an acidic non‐aqueous medium. Cyclic voltammetry studies showed that this complex is an efficient electrocatalyst for hydrogen evolution at the potential of the Ni(II/I) couple. As a potential anticancer agent, the biological activities of the Ni complex were tested against two human cancer cell lines (MCF7 and HT29). The IC 50 results demonstrated that the nickel complex has better cytotoxic activity than cis ‐platin against the human breast cancer cell (MCF7) line. DFT calculations were performed to study the kinetics and thermodynamics of the pincer ligand's synthetic procedure and its Ni complex. Time‐dependent DFT calculations were performed to calculate the pincer ligand's UV–vis spectra and the complex, which was in agreement with the experimental data. To assign the calculated UV spectra, molecular orbital calculations were performed. Finally, a modified mechanism was proposed for the electrocatalytic hydrogen ion reduction by [Ni(P^N^P)Cl]Cl.EtOH. The theoretical calculations showed that the cycle is thermodynamically favorable.