基于双(苯并咪唑)桥联配体构筑的三个配位聚合物的合成、晶体结构及荧光识别性能 |
Syntheses, Crystal Structures, and Luminescence Sensing of Three Coordination Polymers Based on Bis(benzimidazole) Bridging Linkers |
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摘要: 利用双(苯并咪唑)桥联配体1,4-双(2-苯并咪唑基)苯(bbib)和4,4'-双(2-苯并咪唑基)联苯(bbibp)与过渡金属盐在水热条件下反应,合成了3种新型的一维配位聚合物,{[Mn(bbib)(H2O)4](H2BTC)·2H2O}n(1),[Zn(bbib)Cl2]n(2)和[Zn(bbibp)Cl2]n(3),并通过元素分析、红外光谱、粉末X射线衍射分析、单晶X射线衍射等对其结构进行了表征。结构分析表明,配合物1中的O-H…O氢键以及配合物2和3中的C-H…Cl氢键在上述配合物的三维超分子结构的构筑过程中起着重要的作用。在考虑配合物强氢键作用的基础上,配合物1的超分子结构可以简化为(4,6)-连接的{42·58·64·7}{42·64}网络,配合物2可以看做是一个5-连接的{43·67}骨架,配合物3可以简化成6-连接(48·67)-msw网络结构。此外,荧光识别性能研究表明配合物2和3可以实现对水相中Fe3+离子的高灵敏性和高选择性识别。 |
关键词: 配位聚合物 双(苯并咪唑)配体 晶体结构 荧光识别 |
基金项目: 国家自然科学基金(No.21801230)和山西省自然科学基金(No.201801D221084)资助项目。 |
Abstract: Three 1D coordination polymers (CPs), namely, {[Mn(bbib)(H2O)4](H2BTC)·2H2O}n (1),[Zn(bbib)Cl2]n (2), and[Zn(bbibp)Cl2]n (3), have been assembled from the reaction of bbib (1,4-bis(2-benzimidazolyl)benzene) or bbibp (4,4'-bis(2-benzimidazolyl)biphenyl) and transition metal salts. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses (EA), IR spectra, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analyses. Structural analysis reveals that the strong O-H…O hydrogen bonds in 1, and C-H…Cl hydrogen bonds in 2 and 3 play important roles in the formation of those CPs, with the final packing architectures being (4,6)-connected {42·58·64·7}{42·64} net for 1, 5-connected {43·67} net for 2, and 6-connected (48·67)-msw net for 3. Besides, the luminescent sensing investigation indicates that complexes 2 and 3 exhibit highly sensitivity and selectively sensing of Fe3+ ion in aqueous solutions. |
Keywords: coordination polymers bis(benzimidazo-1-ly) ligand crystal structure luminescent sensing |
投稿时间:2019-06-14 修订日期:2019-07-21 |
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牛宇岚,翟丽军,郝小艳,贾焦焦,范黎明.基于双(苯并咪唑)桥联配体构筑的三个配位聚合物的合成、晶体结构及荧光识别性能[J].无机化学学报,2019,35(10):1877-1884. |
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