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通过醛与邻氨基苯硫酚缩合反应制备了三种基于不同结构的二噻吩并噻吩的苯并噻唑衍生物2b,2c与2d,产率分别为44%,35%和42%.并利用核磁共振谱,质谱,高分辨质谱及红外光谱对其结构进行了验证.紫外光谱研究表明随着二噻吩并噻吩的平面性增强,供电子性增强,共轭体系增大,对应苯并噻唑衍生物的最大吸收波长逐渐发生红移.热重分析表明化合物2b,2c与2d均有较高的热分解温度.
Three kinds of benzothiazole derivatives 2b, 2c and 2d based on different structures of dithienothiophene were prepared by the condensation reaction of aldehyde and o-aminothiophenol with the yields of 44%, 35% and 42%, respectively. Its structure was confirmed by resonance spectrum, mass spectrometry, high resolution mass spectrometry and infrared spectroscopy.Ultraviolet spectroscopy showed that with the increase of the planarity of dithienothiophene, the electron donating properties increased and the conjugated system increased. Corresponding to benzothiazole derivatives The redox shifts of the maximum absorption wavelength were observed.The thermogravimetric analysis showed that compounds 2b, 2c and 2d had higher thermal decomposition temperature.