C. Santhosh et Pc. Mishra, ELECTRONIC-STRUCTURES AND SPECTRA OF 6-MERCAPTOPURINE AND 6-THIOGUANINE, Spectrochimica acta. Part A: Molecular spectroscopy, 49(7), 1993, pp. 985-993
Ultraviolet absorption, steady-state fluorescence and excitation spect
ra of 6-mercaptopurine (6MP) and 6-thioguanine (6TG) have been studied
, and excited state life-time measurements on their fluorescence perfo
rmed. The experimental results have been interpreted with the help of
molecular orbital calculations. The study shows that these molecules p
redominantly exist in thione forms. The properties of the molecules ha
ve been compared with those of guanine and the possible significance o
f the results is discussed.