2-取代苯并咪唑类化合物的合成、结构和性质研究

目的基于TiO2光催化性能的染料敏化改性,采用噻吩醛和邻苯二胺缩合反应,合成1-(2-噻吩亚甲基)-2-(2-噻吩基)苯并咪唑及其配合物。方法在稀土金属盐模板剂的作用下,合成得到了1-(2-噻吩亚甲基)-2-(2-噻吩基)苯并咪唑。结果合成了目标产物及其相应的配合物,并且通过单晶结构进行结构表征,用元素分析,红外,热重,固体荧光等进行性质表征。结论在配体合成方法上有一定的创新和突破,该制备方法简便易行,且产物较纯,无副产物,产率高,没有环境污染。

Synthesis,structures and properties for 2-substituted benzimidazole derivatives

Aim Based on the dye sensitization modification of TiO2 photocatalysis properties,to research the condensation reaction between the 2-thiophenealdehyde and o-phenylenediamine,to seek the new method of synthetizing 1-(2-thenylidene)-2-(2-thienyl) benzimidazole and the corresponding complexes.Methods Ligand 1-(2-thenylidene)-2-(2-thienyl) benzimidazole was synthesized via the condensation of o-phenylenediamine and 2-thenaldehyde with catalyst rare earth salt.Results The ligand was obtained and the corresponding complexes were obtained by different methods(in situation synthesize and common method).Then the L and complexes were characterized in many ways such as X-ray crystallography,element analysis,infrared analysis,thermogravimetric analysis and fluorescence analysis.Conclusion The present study has applied a new way to synthesize benzimidazoles compositions and it sheds new light on traditional synthetic methods of the ligand L,and is of great significance for the synthesis of benzimidazoles compositions.This approach makes the preparation process simple,easy to use,and can realize pure product,no by-products,high yield no environmental pollution.