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Structure elucidation of laser-dye coumarin-540A by joint application of X-ray diffraction, X-ray fluorescence, prompt fluorescence, UV and visible spectroscopy.

Keskin SS, Aslan N, Bayrakçeken F

Department of Biomedical Engineering, Yeditepe University, 34755 Istanbul, Turkey.

X-ray, ultraviolet, and visible light induced photophysical changes of coumarin-540A in ethanol has been studied by the joint applications of X-ray, ultraviolet, and visible spectroscopy. Some impurities were found by X-ray fluorescence measurements. During the high power optical pumping, coumarin showed photochemical changes. Photoproduct emission spectra characteristics showed that photoproduct molecules could also be used as a laser-dye at a different emission frequency in the ultraviolet region.

Published 29 May 2007 in Spectrochim Acta A Mol Biomol Spectrosc, 67(3): 1067-71.
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