Synthesis, Structural Characterization, and Photophysical, Electrochemical, Intercomponent Energy-Transfer, and Anion-Sensing Studies of Imidazole 4,5-Bis(benzimidazole)-Bridged Os<sup>II</sup>Os<sup>II</sup> and Ru<sup>II</sup>Os<sup>II</sup> Bipyridine Complexes
作者:Debasish Saha、Shyamal Das、Dinesh Maity、Supriya Dutta、Sujoy Baitalik
DOI:10.1021/ic100905u
日期:2011.1.3
Homo- and heterobimetallic complexes of composition [(bpy)2MII(H2Imbzim)M′II(bpy)2](ClO4)3·nH2O, where MII = M′II = Os (1), MII = Ru and M′II = Os (2), H3Imbzim = 4,5-bis(benzimidazole-2-yl)imidazole, and bpy = 2,2′-bipyridine, have been synthesized and characterized using standard analytical and spectroscopic techniques. Both of the complexes crystallized in monoclinic form with the space group P21/m
均聚物和组合物双核配合物[(联吡啶)2中号II(H 2 Imbzim)M' II(BPY)2 ](CLO 4)3 · Ñ ħ 2 O,其中M II = M' II = OS(1)中,M II = Ru和M' II = OS(2),H 3 Imbzim = 4,5-双(苯并咪唑-2-基)咪唑,和联吡啶= 2,2'-联吡啶,已被合成,并使用标准特征分析和光谱技术。两种配合物均以单斜晶形式结晶,并具有空间群P 21 /米为1和P 2 1 / Ñ为2。配合物的吸收光谱,氧化还原行为和发光特性已被彻底研究。该络合物在紫外线区域显示非常强烈的,以配体为中心的吸收带,在可见光区域显示出中等强度的金属到配体电荷转移(MLCT)带。双金属络合物显示两个连续的单电子可逆金属中心氧化。游离H 3的强荧光通过将能量转移到金属基单元中,Imbzim在金属络合物中被完全淬灭,从而显示出其特征性的MLCT磷光。杂金属配