L. The kinetics of the electron transfer reaction observed when acetonitrile solutions of the complexes were reacted with a range of verdazyl radicals were monitored using stopped-flow spectrophotometry. Under the experimental conditions, the reactions were quite rapid and were monitored under second-order conditions. Marcus linear free energy plots indicated that the outer-sphere electron transfer
范围为通式[Fe 3(µ 3 -O)(O 2 CR)6 L 3 ] ClO 4 (R = CH 2 CN,CH 2 F,CH 2 Cl的以氧为中心的,
羧酸根桥联的三
铁配合物,CH 2 Br,p -NO 2 C 6 H 4; L =
吡啶, 3-
甲基吡啶, 4-
甲基吡啶, 3,5-二
甲基吡啶, 3-
氰基吡啶 和 3-
氟吡啶)已准备好并进行了特征化。R和L的选择是由这样的要求决定的,即配合物与凡达唑基反应时,该配合物会发生单电子还原。除L =的复数以外的所有复数
吡啶R = CH 2 CN,CH 2 Cl和p -NO 2 C 6 H 4尚未见报道。这些化合物的氧化还原行为已使用循环伏安法 在
乙腈通常,所有络合物均表现出可逆的单电子还原。在过量L的存在下,电
化学行为得到改善。
乙腈 使配合物溶液与一定范围的Verdazyl自由基反应,并使用停止流进行监测 分光光度法。在实验条件下,反应相当快,并且在