PHOTOCHEMICAL AND PHOTOPHYSICAL PROPERTIES OF PIROXICAM AND BENOXAPROFEN IN VARIOUS SOLVENTS

被引：14
|
作者：
BECKER, RS [1 ]
CHAKRAVORTI, S [1 ]
YOON, MJ [1 ]
机构：
[1] CHUNGNAM NATL UNIV,DEPT CHEM,TAEJON,SOUTH KOREA
来源：
PHOTOCHEMISTRY AND PHOTOBIOLOGY | 1990年 / 51卷 / 02期
关键词：
D O I：
10.1111/j.1751-1097.1990.tb01696.x
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Abstract— Laser flash spectroscopy was used to examine the title compounds. Piroxicam has a triplet transient with a maximum near 450 and a lifetime of 3–21 μs depending on the solvent. The relative quantum yield is highly solvent dependent being maximum in toluene and 14 fold lower in hydrogen bonding solvents. There is another transient which is assigned as a proton transferred ground state transient. Some permanent photoproduct also appears to be produced. Benoxaprofen also has a triplet transient with a maximum near 420 nm with a lifetime of 65 μs to 250 μs depending on the solvent. In this case, the relative quantum yield only slightly varies among polar and hydrogen bonding solvents. This is in marked contrast to published data on the fluorescence yield. Some permanent photoproduct appears to be produced. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码：151 / 154
页数：4
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