Tuning of Redox Potentials for the Design of Ruthenium Anticancer Drugs − an Electrochemical Study of [<i>trans</i>-RuCl<sub>4</sub>L(DM<i>S</i>O)]<sup>-</sup> and [<i>trans</i>-RuCl<sub>4</sub>L<sub>2</sub>]<sup>-</sup> Complexes, where L = Imidazole, 1,2,4-Triazole, Indazole
作者:Erwin Reisner、Vladimir B. Arion、M. Fátima C. Guedes da Silva、Roman Lichtenecker、Anna Eichinger、Bernhard K. Keppler、Vadim Yu. Kukushkin、Armando J. L. Pombeiro
DOI:10.1021/ic049479c
日期:2004.11.1
electrochemical behavior of [trans-RuCl(4)L(DMSO)](-) (A) and [trans-RuCl(4)L(2)](-) (B) [L = imidazole (Him), 1,2,4-triazole (Htrz), and indazole (Hind)] complexes has been studied in DMF, DMSO, and aqueous media by cyclic voltammetry and controlled potential electrolysis. They exhibit one single-electron Ru(III)/Ru(II) reduction involving, at a sufficiently long time scale, metal dechlorination on solvolysis,
[反式-RuCl(4)L(DMSO)](-)(A)和[反式-RuCl(4)L(2)](-)(B)的电化学行为[L =咪唑(Him),1 1,2,4-三唑(Htrz)和吲唑(Hind)]配合物已在DMF,DMSO和水性介质中通过循环伏安法和可控电位电解进行了研究。它们表现出一种单电子Ru(III)/ Ru(II)还原,包括在足够长的时间范围内进行溶剂分解时的金属脱氯,以及在有机介质中一种单电子可逆Ru(III)/ Ru( IV)氧化。氧化还原电位值是根据Lever的参数化方法进行解释的,并且首次提出了此线性表达式的特定形式(将氧化还原电位与配体E(L)参数相关联),用于在磷酸盐缓冲液(pH 7)介质中与Ru(III / II)氧化还原对中心带负电荷的(1-)配合物,以及在有机介质中与Ru(III / IV)耦合对的配合物。对吲唑的E(L)参数进行了估计,表明该配体的行为比咪唑或三唑的净电子给