Piroxicam |
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| The chemical structure of Piroxicam is shown at the right. The absorption and fluorescence emission spectra are shown below. The structure, absorption, and fluorescence data were all obtained from the PhotochemCAD package by Jonathan Lindsey. This excellent program allows rapid comparison of spectra and enables one to do a variety of photochemically relevant calculations. |
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Absorption
This is a graph of the molar extinction coefficient of Piroxicam dissolved in hexane. It was measured by R. A. Fuh on 6/25/97 [H. Du, R. A. Fuh, J. Li, A. Corkan, J. S. Lindsey, "PhotochemCAD: A computer-aided design and research tool in photochemistry," Photochemistry and Photobiology, 68, 141-142, 1998]. Piroxicam has a molar extinction coefficient of 13,000 M-1cm-1 at 325 nm [M. Yoon, H. N. Choi, H. W. Kwon, and K. H. Park, "Solvent dependence of absorption and fluorescence spectra of piroxicam. A possible intramolecular proton transfer in the excited state.," Bull. Korean Chem. Soc., 9, 171-175, 1988].
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Fluorescence
This is the fluorescence emission spectrum of Piroxicam dissolved in hexane. The spectrum was taken by R. A. Fuh on 6/25/97 using an excitation wavelength of 330 nm [H. Du, R. A. Fuh, J. Li, A. Corkan, J. S. Lindsey, "PhotochemCAD: A computer-aided design and research tool in photochemistry," Photochemistry and Photobiology, 68, 141-142, 1998]. The quantum yield is 0.035 [M. Yoon, H. N. Choi, H. W. Kwon, and K. H. Park, "Solvent dependence of absorption and fluorescence spectra of piroxicam. A possible intramolecular proton transfer in the excited state.," Bull. Korean Chem. Soc., 9, 171-175, 1988]. |
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