Induced Absorption Spectra of a Crystal Violet Dye

• Published in: Russian physics journal Vol. 64; no. 11; pp. 2089 - 2095
• Main Authors: Dmitrieva, N. G., Bocharnikova, E. N., Ezhov, D. M
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01-03-2022; Springer; Springer Nature B.V
• Subjects: Absorption spectra; Alcohols; Condensed Matter Physics; Dyes; Ethanol; Hadrons; Heavy Ions; Isopropanol; Lasers; Mathematical and Computational Physics; Neodymium lasers; Nuclear Physics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Pulse duration; Pulse repetition frequency; Room temperature; Solvents; Theoretical; YAG lasers; triplet-triplet absorption; singlet-singlet absorption; induced absorption spectra; crystal violet
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-022-02560-1

Using the pump-probe method, the short-lived induced and long-lived absorption capacity of a crystal violet (CV) dye is studied in various solvents. The solvents selected for this study are water, dimethyl sufoxide (DMSO), and isopropyl and ethyl alcohols. The formation of triplet-triplet states of CV is observed in these solvents under excitation by the 4-th harmonic nanosecond radiation of a Nd:YAG-laser (wavelength 266 nm, average power 25.5 mW, pulse repetition frequency 3 Hz, pulse duration 10 ns, and peak power 10−12 MW/cm
2
). 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 is recorded at room temperature in the region of 400–500 nm.