Synthesis, Characterization, Crystal Structure, and Electrochemical, Photophysical, and Protein-Binding Properties of Luminescent Rhenium(I) Diimine Indole Complexes
作者:Kenneth Kam-Wing Lo、Keith Hing-Kit Tsang、Wai-Ki Hui、Nianyong Zhu
DOI:10.1021/ic050531u
日期:2005.8.1
We report the synthesis, characterization, and photophysical and electrochemical properties of a series of luminescent rhenium(I) diimine indole complexes, [Re(N-N)(CO)3(L)](CF3SO3) (N-N = 3,4,7,8-tetramethyl-1,10-phenanthroline (Me4-phen), L = N-(3-pyridoyl)tryptamine (py-3-CONHC2H4-indole) (1a), N-[N-(3-pyridoyl)-6-aminohexanoyl]tryptamine, (py-3-CONHC5H10CONHC2H4-indole) (1b); N-N = 1,10-phenanthroline
NN = Me4-phen(1c),phen(2c),Me2-phen(3c),Ph2-phen(4c))。还研究了配合物3a的X射线晶体结构。辐照后,大多数络合物在298 K的流体溶液中和在低温玻璃中均表现出三重态金属到配体的电荷转移(3MLCT)(d pi(Re)-> pi *(二亚胺))发射。然而,Me4-phen配合物在室温下在溶液中的结构特征和较长的发射寿命表明,这些配合物的激发态表现出基本的三重态配位体(3IL)(pi-> pi *)(Me4-phen)特征。已经检查了这些复合物与包括牛血清白蛋白和色氨酸酶在内的吲哚结合蛋白的结合相互作用。大多数配合物在298 K的流体溶液中和在低温玻璃中均表现出三重态金属到配体的电荷转移(3MLCT)(d pi(Re)-> pi *(diimine))发射。然而,Me4-phen配合物在室温下在溶液中的结构特征和较长的发射寿命表明,这些配合物