Nuclearity dependent solvent contribution to the catechol oxidase activity of novel copper(<scp>ii</scp>) complexes derived from Mannich-base ligand platforms: synthesis, crystal structure and mechanism
作者:Ria Sanyal、Sergey Ketkov、Suranjana Purkait、Franz A. Mautner、Grigory Zhigulin、Debasis Das
DOI:10.1039/c7nj00425g
日期:——
remarkable rate enhancements by the tetranuclear species in MeCN (kcat = 0.0218 s−1), complex 1 follows a reverse trend in the solvent dependent kinetic study compared to complexes 2–5 with a minimum at 25% water (kcat = 0.0118 s−1) under similar experimentalconditions. Theoretical modeling involving the reactions of complexes 1, 3 and 5 provides the counterintuitive rationalization of the apparently dramatic
Influence of the Coordination Environment of Zinc(II) Complexes of Designed Mannich Ligands on Phosphatase Activity: A Combined Experimental and Theoretical Study
作者:Ria Sanyal、Averi Guha、Totan Ghosh、Tapan Kumar Mondal、Ennio Zangrando、Debasis Das
DOI:10.1021/ic4015493
日期:2014.1.6
mononucleating (HL1) and a dinucleating (HL2) “end-off” compartmental ligand have been designed and synthesized by controlled Mannich reaction using p-cresol and bis(2-methoxyethyl)amine, and their formation has been rationalized. Six complexes have been prepared on treating HL1 and HL2 with ZnIIX2 (X = Cl–, Br–, I–) with the aim to investigate their hydrolytic activity on phosphoester bond cleavage. Interestingly