Synthesis, characterization and structure–property relationship studies of cobaloximes with dithienylglyoxime as the equatorial ligand

Electrochemistry and Electrocatalytic Activity of Cobaloxime Complexes

“…The redox processes of the organocobaloximes ( 10,11 ) are shifted cathodically i. e. for inorganic cobaloxime the reduction potential was observed at −0.2 mV and for organocobaloxime the reduction potential appeared nearly −0.6 mV. This cathodic shift was reported due to the σ donation ability of the alkyl groups [28] …”

“…The study confirmed that cobaloxime containing aniline derivatives could be used as an alternative for pyridine complex. The CV of the complexes (27)(28)(29)(30) showed an irreversible reduction peak of Co(II)/(I) couple and a reversible peak was observed at more negative potentials while increasing the scan rate. The authors used acetic acid as a proton source.…”

“…In the same year K.Kumar and B.D.Gupta [28] synthesized cobaloximes of the type X/RCo(dThgH) 2 py (9)(10)(11), where X=Cl, R=Et, Bu, Bn and dThgH is dithienyl glyoxime. The complexes were characterized by 1 H NMR and X-ray Crystallography.…”

“…This cathodic shift was reported due to the σ donation ability of the alkyl groups. [28] The electrochemical behavior of the cobalt(III) complexes (12)(13)(14) was studied by cyclic voltammetry showed a oneelectron reduction process. The CV of all the complexes indicated a quasi-reversible voltammograms corresponding to Co(III)/Co(II).…”

Chlorocobaloxime containing N-(4-pyridylmethyl)-1,8-naphthalamide peripheral ligands: synthesis, characterization and enhanced electrochemical hydrogen evolution in alkaline medium

“…It has also been observed that the electronic properties of cobaloximes can be modulated by employing different substituents at the equatorial dioximes and/or axial ligands and therefore, the catalytic activity can easily be modified. 18,19 The immobilization of molecular catalysts onto conductive or semiconducting surfaces has emerged as a promising strategy for the electrocatalytic hydrogen evolution reaction (HER) to attain the advantages of both homogeneous and heterogeneous catalytic systems. 8,[20][21][22][23][24][25] A high specific surface area, good electrical conductivity, and electrochemical stability of the conductive support may result in improved electrocatalytic activity.…”