Effect of ligand substituents on the reactivity pathways of copper(II) complexes towards electrocatalytic water oxidation.

The electrocatalytic water oxidation activity of three copper(II) complexes [Cu(L1H)(L)](ClO) (1), [Cu(L2H)(L)(HO)](ClO) (2) and [Cu(L3H)(L)](ClO) (3) with aryl oxime ligands L1H, L2H and L3H [L1H = 1-(pyridin-2-yl)methanone oxime, L2H = 1-(pyridin-2-yl)ethanone oxime and L3H = 1-(pyridin-2-yl)propanone oxime] was investigated. All the three ligands have in common a pyridyl group attached to the carbon centre of the oxime moiety and differ in the second substituent attached to the carbon centre. Electrochemical investigation of the catalytic activity of complexes 1, 2 and 3 shows that the nature of the substituent attached to the carbon centre has an influence on the catalytic pathway and overall catalytic activity of these complexes.

Engineering Spherically Super-Structured Polyamides for the Sustainable Water Remediation.

Unlike metal-ornamented hybrid material and linear polymers, we invoked the growth of a biodegradable superstructured cross-linked polyamide-ester material. The material is thermally stable. The thiol-alkene photoclicked material acted as an efficient water remediator.

Colorimetric detection of fluoride ions in aqueous medium using thiourea derivatives: a transition metal ion assisted approach.

This work explores the position of the hydroxyl moiety and its participation in intramolecular H-bonding towards dictating the fluoride selective colorimetric response in functionalized thiourea derivatives. The study reveals the pivotal aspect of the hydroxyl moiety in C2 towards attaining selectivity for fluoride over acetate and dihydrogenphosphate ion. Furthermore, a methodology employing stabilization of deprotonated thiourea through metal ion (Ni and Cu) coordination is proposed for the colorimetric sensing of fluoride in water medium.

Ligand assisted electrocatalytic water oxidation by a copper(ii) complex in neutral phosphate buffer.

The electrocatalytic water oxidation activity of a copper(ii) complex, 1, [Cu(L1H)(L1)(OH2)](ClO4), with a redox active aryl oxime ligand, L1H [L1H = 1-(pyridin-2-yl) ethanone oxime] has been investigated. Complex 1 shows a remarkably high turnover frequency of ∼100 s-1 in neutral phosphate buffer at about 675 mV overpotential with ∼94% faradaic efficiency. Electrochemical analysis suggests the involvement of a ligand moiety in a proton-coupled-electron-transfer (PCET) step during the catalytic cycle of complex 1, which in turn provides a route for accumulation of high oxidizing equivalents at the reaction center.

N,N-diphenylbenzamide.

In the title compound, C(19)H(15)NO, the neutral molecules are held together in the crystal structure by very weak C-H...