Spectroscopic manifestations of the interaction of acridine and 9-phenylacridine molecules with thiols

Ultrafast nonradiative transitions between higher excited states in organic molecules

“…Previously, 97, 100 ± 106 it was estimated from changes in the intensity of transmitted laser radiation with the frequency n 2 upon turning on a laser with the frequency n 1 and from the amplitude of additional opto-acoustical signal which appeared upon simultaneous illumination of the object under study by two laser pulses. 107 The fluorescence quantum yield was also estimated 108 from the following relationship q fl n0 I fl n0 I fl 10 s 1n I ex 2 t r1 ,…”