取代基对苯并噻唑性质的调控作用  

Effects of substituents on the spectrum properties of benzothiazoles

作　　者：刘亚楠[1] 杨芳[1] 睢超霞[2] 郑文杰[1] 

机构地区：[1]暨南大学化学系,广东广州510632 [2]漯河职业技术学院,漯河462002

出　　处：《暨南大学学报（自然科学与医学版）》2009年第3期293-297,共5页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：国家自然科学基金项目(20771044);广东省科技计划项目(2007B030703007)

摘　　要：研究了2-巯基苯并噻唑(MBT)和2-氨基苯并噻唑(ABT)的紫外吸收光谱、荧光光谱,探讨了取代基-SH和-NH2对苯并噻唑性质的调控作用.结果表明:在苯并噻唑的邻位上引入-SH和-NH2,对苯并噻唑的光谱性质、配位性质均有很强的调控作用.进一步考察溶剂极性、溶液pH值和金属离子对MBT和ABT紫外光谱和荧光光谱的影响,发现随溶剂极性增大,MBT的最大吸收波长基本不变,但其吸收强度明显增强;而ABT的吸收光谱峰位发生了显著的红移并且峰值增大;金属离子对MBT、ABT的紫外光谱、荧光光谱产生一定影响.The effects of - SH and - NH2 substituents on the UV-VIS spectra and fluorescence spectra of 2-mercaptobenzothiazole （MBT） and 2-aminobenzothiazole （ABT） were investigated in the present study. The results indicated that - SH and - NH2 substituents showed strong effects on the spectrum properties of benzothiazoles. Furthermore, the effects of solvent polarity,solvent pH and metal ions on UV-VIS spectra and fluorescence spectra of 2-mercaptobenzothiazole （MBT） and 2-aminobenzothiazole （ABT） were also studied. It was found that with the increase in solvent polarity, the maximum absorption wavelength of MBT has no change basicaUy, but significant enhancement in that of MBT was observed. However, the absorption peak of ABT increased obviously and showed clear red shift. In addition, the metal ions also showed different effects on the spectrum properties of MBT and ABT.

关 键 词：苯并噻唑 2-巯基苯并噻唑 2-氨基苯并噻唑 紫外光谱 荧光光谱 

分 类 号：O613.51[理学—无机化学] O626[理学—化学]