Articles

Investigation on Synthesis and Photostabilities of Novel Asymmetric Benzothiazole Trimethine Cyanine Dyes

  • Chen Xiuying ,
  • Guo Lin ,
  • Zheng Changge ,
  • Gao Haiyan ,
  • Wang Haijun ,
  • Zhang Dan
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  • Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122

Received date: 2012-01-09

  Revised date: 2012-04-23

  Online published: 2012-05-11

Supported by

Project supported by the National Natural Science Foundation of China (No. 20706026) and the Fundamental Research Funds for the Central Universities (Nos. JUSRP211A12, JUSRP21110).

Abstract

Novel asymmetric trimethine benzothiazole cyanine dyes with different N-substituents were synthesized and characterized by MS and 1H NMR techniques. The maximums of absorption and emission spectra of the dyes in ethanol were in the range of 628~631 and 662~666 nm, respectively. The dyes were almost non-fluorescent in solvents, which can reduce the background interference greatly. The photodegradation experiment showed that the octyl group on quinoline ring and benzyl group on benzothiazole ring improved the photostabilites of the dyes obviously. The rate constants of photoreaction of the dyes 8a8d were 6.38×10-4, 12.5×10-4, 2.68×10-4 and 6.30×10-4 mol·min-1, respectively. Oxidation potentials were determined by cyclic voltammetry.

Cite this article

Chen Xiuying , Guo Lin , Zheng Changge , Gao Haiyan , Wang Haijun , Zhang Dan . Investigation on Synthesis and Photostabilities of Novel Asymmetric Benzothiazole Trimethine Cyanine Dyes[J]. Chinese Journal of Organic Chemistry, 2012 , 32(08) : 1445 -1449 . DOI: 10.6023/cjoc1201091

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