A comparative study of symmetrical and unsymmetrical trimethine cyanine dyes bearing benzoxazolyl and benzothiazolyl groups

作者：Shi Quan Quan; Sun Ru; Ge Jian Feng^*; Xu Qing Feng; Li Na Jun; Lu Jian Mei

来源：Dyes and Pigments, 2012, 93(1-3): 1506-1511.

DOI：10.1016/j.dyepig.2011.11.001

• Cyanine dye
• Trimethine cyanine
• Spectral property
• DFT calculation
• Benzoxazolyl
• Benzothiazolyl

Six symmetrical and unsymmetrical trimethine cyanine dyes bearing benzothiazolyl and benzoxazolyl groups were synthesized. Their linear optical properties were studied. It was found that the variation of hetero atoms play an important role in the spectral properties of the dyes. Sequential replacement of the oxygen atom by the sulfur atom resulted in a change in shade from yellow to purple. In order to understand the relationship between the molecular structures and the spectral properties of these dyes, theoretical calculations were made using the Gaussian programme. Key parameters related to absorption and emission spectra were reported and discussed.

• 出版日期2012-6
• 单位苏州大学