Спектры наведенного поглощения кристаллического фиолетового

Abstract

The "pump-probe" method was used to study the short-lived induced singlet-singlet and long-lived triplet-triplet absorption capacity of crystal violet (CV) in various solvents. Water, dimethyl sulfoxide, isopropyl alcohol, and ethyl alcohol were chosen as solvents. The formation of CV triplet states in various solvents under excitation by nanosecond radiation of the 4th harmonic of a Nd:YAG laser (wavelength 266 nm, average power 25.5 mV, repetition rate 3 Hz, pulse duration 10 ns, peak power - 10-12 MW/cm2). It is shown that the nonstationary spectra of induced absorption of CV in ethanol contain two bands at 400 and 485 nm. In isopropyl alcohol, both singlet-singlet and long-lived triplet-triplet absorption of CV > 17.2 ns at room temperature in the region of 400-500 nm were recorded.