GODARD, A.;QUEGUINER, G., J. HETEROCYCL. CHEM., 1982, 19, N 6, 1289-1296
作者:GODARD, A.、QUEGUINER, G.
DOI:——
日期:——
Godard, Alain; Queguiner, Guy, Journal of Heterocyclic Chemistry, 1982, vol. 19, p. 1289 - 1296
作者:Godard, Alain、Queguiner, Guy
DOI:——
日期:——
Differences of pH-Dependent Mechanisms on Generation of Hydride Donors using Ru(II) Complexes Containing Geometric Isomers of NAD<sup>+</sup> Model Ligands: NMR and Radiolysis Studies in Aqueous Solution
作者:Brian W. Cohen、Dmitry E. Polyansky、Ruifa Zong、Hui Zhou、Theany Ouk、Diane E. Cabelli、Randolph P. Thummel、Etsuko Fujita
DOI:10.1021/ic101098v
日期:2010.9.6
species is followed by disproportionation to one equivalent starting complex [Ru(bpy)2(5)]2+ and one equivalent [Ru(bpy)2(5HH)]2+. The structural difference between [Ru(bpy)2(pbn)]2+ and [Ru(bpy)2(5)]2+ dictates the mechanism and product formation in aqueous medium. The exchange of the nitrogen and carbon atoms on the azaacridine ligands alters the accessibility of the dimerization reactive site, thereby
比较了pH依赖性减少烟酰胺腺嘌呤二核苷酸(NADH)模型复合物[Ru(bpy)2(5)] 2+(5 = 3-(吡啶基2'-基)-4-氮杂cr啶)的机理以前研究的几何异构体[Ru(bpy)2(pbn)] 2+(pbn = 2-(pyrid-2'-yl)-1-azaacridine,以前称为2-(pyrid-2' (羟基)-苯并[ b ] -1,5-萘啶)在水性介质中。[Ru(bpy)2(5)] 2+暴露于CO 2 •-导致形成单电子还原态(k = 4.4×10 9 M-1 s -1)。在pH <11.2时,可以使单电子还原的物质质子化,k = 2.6×10 4 s -1在D 2 O中。在5-13的pH范围内观察到C-C键二聚体的形成(k = 4.5×10 8 M -1 s -1)。在pH <11时,两个质子化的自由基发生反应形成稳定的CC键二聚体。在pH> 11时,两个单电子还原的物质二聚,