Das A, Nandi R, Maiti M
Biophysical Chemistry Laboratory, Indian Institute of Chemical Biology, Calcutta.
Photochem Photobiol. 1992 Sep;56(3):311-7. doi: 10.1111/j.1751-1097.1992.tb02165.x.
The photophysical property of the alkanolamine form of sanguinarine has been studied in aqueous and organic medium under various environmental conditions from the measurement of absorption, fluorescence and NMR spectroscopy. Alkanolamine fluorescence shows an excitation time dependent fluorescence quenching and the rate of quenching increases significantly with increasing pH and concentration of the species, while it decreases with increasing temperature. This phenomenon is explained by excited state intramolecular proton transfer from a 6-OH group to the lone pair of nitrogen through the formation of zwitterion.
通过吸收光谱、荧光光谱和核磁共振光谱测量，研究了在各种环境条件下，水相和有机介质中血根碱烷醇胺形式的光物理性质。烷醇胺荧光显示出激发时间依赖性荧光猝灭，猝灭速率随着物种pH值和浓度的增加而显著增加，而随着温度的升高而降低。这种现象可以通过激发态分子内质子从6-OH基团通过两性离子的形成转移到氮孤对来解释。
