Facultad de Química, Departamento de Química Inorgánica y Nuclear, Universidad Nacional Autónoma de México, México, DF, México.
J Inorg Biochem. 2010 Oct;104(10):1112-8. doi: 10.1016/j.jinorgbio.2010.06.010. Epub 2010 Jul 4.
A dicopper complex is described for which significant catecholase activity was found, particularly for a compound in which the two metal ions are more than 7A apart. Variations on the catecholase activity of this complex were explored in a range of pH values from 5.5 to 9.0 in two solvent mixtures, MeCN/H(2)O and MeOH/H(2)O. The catalytic performance of the complex was found to be substantially better in the second, where the maximum activity was achieved at a pH value one unit lower than in the first. Electrochemical studies of the complex in the absence and presence of dioxygen revealed a very different behavior in each of the two solvent mixtures, which may account for the correspondingly distinct catalytic activity.
本文描述了一种双核铜配合物，该配合物具有显著的儿茶酚酶活性，特别是对于两个金属离子之间距离超过 7A 的化合物。在 MeCN/H2O 和 MeOH/H2O 两种溶剂混合物中，研究了该配合物在 pH 值为 5.5 至 9.0 范围内的儿茶酚酶活性变化。在第二种溶剂混合物中，该配合物的催化性能明显更好，其最大活性出现在比第一种溶剂混合物低一个 pH 值的位置。在不存在和存在氧气的情况下对该配合物进行电化学研究，发现其在两种溶剂混合物中的行为非常不同，这可能解释了相应的不同催化活性。
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