donor excited state to the dimanganese acceptor, and a lack of emission from the compound upon formation of an optical glass at 80 K. Electronic coupling constants for Dexter transfer were determined to be approximately 10 cm(-1) and approximately 0.15 cm(-1) in complexes 3 and 4, respectively, indicating that the change in spatial localization of the excited state from the bridge (complex 3) to the
具有通式 [M2(L)(mcb)(Ru(4,4'-(X)2-bpy)2)](PF6)3(其中 M = Mn(II) 或 Zn(II),X =
CH3 或
CF3,mcb 是 4'-甲基-4-羧基-
2,2'-联吡啶,L 是衍生自 2,6-二甲酰基-的席夫碱大环描述了 4-甲基
苯酚和双(2-
氨基乙基)-N-
甲胺)。同构分子均由与 Ru(II) 多
吡啶配合物共价连接的双核
金属核组成。[Mn2(L)(mcb)(Ru(( )2-bpy)2)](PF6)3 (4) 在脱氧
CH2Cl2 溶液中的光激发导致 Ru(II) 生色团的 3MLCT 激发态的发射特征但有一个生命周期 (tau(obs) = 5.0 +/- 0. 1 ns) 和辐射量子产率 (Phi(r) 大约 7 x 10(-4)) 相对于 Zn(II) 模型复合物 [Zn2(L)(mcb)(Ru(( )2- bpy)2)](PF6)3