制备了两种异构的双核配体PBTPA和MBTPA及其铜(II)配合物,并检查了磷酸二酯模型底物:双(对硝基苯基)磷酸酯的水解。对于铜(II)和PBTPA的双核配合物,观察到钟形的pH与速率关系,与双金属核酸酶/磷酸酶提出的一种机理相一致。在pH 8.4下,达到了1.14 x 10(-6)s(-1)的最大速率-是未催化反应的10-4倍以上。但是,MBTPA的类似复合物并未显示出明显的速率增强。铜(II)和PBTPA的双核配合物还显示出比铜(II)和三(2-吡啶基甲基)胺(TPA)催化的单核配合物加速10倍的性能。
Electrochemical behavior and dioxygen reactivity of tripodal dinuclear copper complexes linked by unsaturated rigid spacers
作者:Antoine Gomila、Nicolas Le Poul、Jean-Michel Kerbaol、Nathalie Cosquer、Smaïl Triki、Bénédicte Douziech、Françoise Conan、Yves Le Mest
DOI:10.1039/c2dt31456h
日期:——
(TMPA) units linked by a series of delocalized π-electrons spacers have been synthesized. Their di-CuII complexes have been prepared and structurally characterized. As compared to the corresponding monotopic complexes, these dinuclear CuII complexes reveal spectroscopic and voltammetric features ascribable to weakly perturbed electronic interactions. In the case of the anthracenyl spacer, observation
Geometry-Dependent Phosphodiester Hydrolysis Catalyzed by Binuclear Copper Complexes
作者:Lei Zhu、Osvaldo dos Santos、Chi Wan Koo、Marc Rybstein、Louise Pape、James W. Canary
DOI:10.1021/ic0340985
日期:2003.12.1
achieved. However, the analogous complex of MBTPA did not show significant rate enhancement. The binuclearcomplex of copper(II) and PBTPA also showed 10-fold acceleration over mononuclear complex of copper(II) and tris(2-pyridylmethyl)amine (TPA) catalyzed reaction. A phage phiX174 DNA assay showed that the complex of copper(II) and PBTPA promoted supercoiled phage phiX174 DNA relaxation under both aerobic
制备了两种异构的双核配体PBTPA和MBTPA及其铜(II)配合物,并检查了磷酸二酯模型底物:双(对硝基苯基)磷酸酯的水解。对于铜(II)和PBTPA的双核配合物,观察到钟形的pH与速率关系,与双金属核酸酶/磷酸酶提出的一种机理相一致。在pH 8.4下,达到了1.14 x 10(-6)s(-1)的最大速率-是未催化反应的10-4倍以上。但是,MBTPA的类似复合物并未显示出明显的速率增强。铜(II)和PBTPA的双核配合物还显示出比铜(II)和三(2-吡啶基甲基)胺(TPA)催化的单核配合物加速10倍的性能。