论文部分内容阅读
The ethyl coumarin-3-carboxylate(1) and its two derivatives,ethyl 7-methoxy-2-oxo-2H-chromene-3-carboxylate(2) and ethyl 7-(3-methylbut-2-enyloxy)-2-oxo-2H-chromene-3-carboxylate(3),were synthesized,characterized and their UV-vis spectra and photoluminesc