The synthesis and characterization of novel coumarin dyes derived from 1,4-diethyl-1,2,3,4-tetrahydro-7-hydroxyquinoxalin-6-carboxaldehyde
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- 作者：Amit R. Jagtap ; Vijay S. Satam ; Rajkumar N. Rajule ; Vinod R. Kanetkar
- 关键词：1 ; 4-Diethyl-1 ; 2 ; 3 ; 4-tetrahydro-7-hydroxyquinoxalin-6-carboxaldehyde ; Coumarins ; Synthesis ; Fluorescence ; Thermal stability ; Spectral characteristics
- 刊名：Dyes and Pigments
- 出版年：2009
- 出版时间：July 2009
- 年：2009
- 卷：82
- 期：1
- 页码：84-89
- 全文大小：400 K
文摘
1,4-Diethyl-1,2,3,4-tetrahydro-7-hydroxyquinoxalin-6-carboxaldehyde was synthesized and condensed with substituted active methylene compounds to obtain a series of novel coumarin compounds. Solutions of the dyes in various solvents exhibited an orange hue and brilliant fluorescence and displayed high thermal stability, as determined using thermogravimetric analysis. The dye having a heterocyclic benzimidazole ring as an electron withdrawing system was selected as a representative compound for comparison of its spectral characteristics with known analogues.