Structures and Fluorescent Properties of Cadmium(II) Complexes with 1D and 2D Structures Based on Tridentate Benzimidazole Ligands

被引:5
|
作者
Feng, Rui [1 ]
Hou, Yong [1 ]
Wu, Zhen-Zhen [1 ]
Yang, Yan [1 ]
Nie, Feng-Mei [1 ]
机构
[1] Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R China
来源
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2015年 / 641卷 / 11期
关键词
2,6-Bis(benzimidazol-2-yl)pyridine; Cadmium; Bis(2-benzimidazolylmethyl)amine; Fluorescent properties; DNA-BINDING PROPERTIES; CRYSTAL-STRUCTURES; SUPRAMOLECULAR ASSEMBLIES; COORDINATION FRAMEWORKS; METAL-COMPLEXES; X-RAY; POLYBENZIMIDAZOLE; RECOGNITION; DERIVATIVES; ZINC(II);
D O I
10.1002/zaac.201400511
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The cadmium(II) complexes [CdL1(m-nba)(2)] (1), [CdL1(p-nba)(2)]center dot C2H5OH (2), [CdL2(p-nba)(2)]center dot CH3OH (3), and [CdL2(p-nbat)(2)] (4) containing the ligands L1 and L2 [L1 = 2,6-bis(benzimidazol-2yl) pyridine, L2 = bis(2-benzimidazolylmethyl) amine] were synthesized and characterized (m-nba, p-nba, and p-nbat are the anions of pnitrobenzoic acid, m-nitrobenzoic acid, and p-nitrobenzeneacetic acid, respectively). The complexes were investigated by X-ray single crystal diffraction, elemental analysis as well as IR and fluorescence spectroscopy. Compounds 1-3 contain a distorted pentagonal bipyramidal coordination sphere with Cd-II coordinated by two carboxylate ligands in bidentate-chelating mode, whereas complex 4 exhibits a distorted octahedral arrangement with one carboxylate ligand in bidentate-chelating and the other in monodentate coordination mode. 1 and 2 form a 1D chain interplayed by hydrogen bonding and strong pi-pi stacking interactions. 3 and 4 vary from 1D chain into 2D single-layer and double-layer networks because of more extensive hydrogen bonding interactions. The complexes show emission maxima in the blue region in the solid state and emission bands are red-shifted compared to those of the free ligands.
引用
收藏
页码:1918 / 1925
页数:8
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