Reduction of Ferricytochrome <i>c</i> Catalyzed by Optically Active Chromium(III) Complexes
作者:Ulrich Scholten、Céline Diserens、Helen Stoeckli-Evans、Klaus Bernauer、Michel Meyer、Ludovic Stuppfler、Dominique Lucas
DOI:10.1021/ic900330q
日期:2009.12.7
by the presence of the optically active complexes Λ-[CrIII((S,S)-promp)H2O]+ (H2promp = N,N′-[(pyridine-2,6-diyl)bis(methylene)]-bis[(S)-proline]), Δ-[CrIII((R,R)-alamp)H2O]+ (H2alamp = N,N′-[(pyridine-2,6-diyl)bis(methylene)]-bis[(R)-alanine]) and Λ-[CrIII((S,S)-alamp)(H2O)2]+. These were shown to undergo reversible one-electron reduction to the corresponding labile chromium(II) species by cyclic voltammetry
已通过吸收分光光度法在pH 7.5的缓冲溶液中测量了汞齐化锌或在汞池上作为固定阴极在固定电位下电解产生的马心铁细胞色素c的还原速率。在这两种情况下,旋光配合物Λ-[Cr III((S,S)-提示)H 2 O] +(H 2提示= N,N '-[(吡啶- 2,6-二基)双(亚甲基)]-双[(S)-脯氨酸]),Δ-[Cr III((R,R)-alamp)H 2 O] +(H 2 alamp = N,N '-[(吡啶-2,6-二基)双(亚甲基)]-双[(R)-丙氨酸])和Λ-[Cr III((S,S)-alamp) (H 2 O)2 ] +。通过循环伏安法(CV)可以看出,这些化合物经历了可逆的单电子还原,变成了相应的不稳定铬(II)物种,尽管Λ-[Cr III((S,S)-alamp)(H 2 O)2 ] +复合材料的行为不同于其他两个。循环伏安图显示在-1.1 V / SHE以下与Cr 3+ /