The synthesis and crystal structures of new 2-aminomethylbenzimidazole Zinc(II) complexes exhibiting luminescence
作者： Hong-Yan Wu , Hong Li , Bao-Lin Zhu , Shu-Rong Wang , Shou-Min Zhang
DOI: 10.1007/S11243-007-9007-1
关键词:
摘要: Two new blue luminescent Zn(II) complexes, [ZnL2(H2O)]Cl2 · H2O (1) and [ZnL2Cl][ZnLCl2] NO3 (2) (L = 2-aminomethylbenzimidazole) have been synthesized characterized spectroscopically crystallographically. The structure of complex can be described as a square pyramid. In the (2), there are two units [ZnLCl2] (a), [ZnL2Cl]+ (b), which distorted tetrahedral geometry slightly trigonal bipyramidal coordination geometry, respectively. these significant multiple inter- intra-molecular hydrogen bonding π–π stacking interactions shown. These contacts lead to aggregation supramolecular assembly complexes into 3D 2D frameworks, Fluorescent analysis in dilute DMF solution solid state shows that both exhibit intense emission region. They display high luminescence quantum efficiency due metal-to-ligand charge transfer (MLCT) bathochromic shift energy compared with free ligand L. intensity is higher than (1).
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