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ELECTRON PARAMAGNETIC RESONANCE OF SOME TRIPHENYLMETHANE DYES IN THE TRIPLET STATE
Author(s) -
Leaver I. H.
Publication year - 1974
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1974.tb06516.x
Subject(s) - triphenylmethane , malachite green , crystal violet , chemistry , electron paramagnetic resonance , triplet state , photochemistry , paramagnetism , spectral line , crystal (programming language) , absorption spectroscopy , trigonal crystal system , resonance (particle physics) , nuclear magnetic resonance , crystallography , atomic physics , molecule , crystal structure , physics , condensed matter physics , optics , organic chemistry , adsorption , medicine , pathology , astronomy , computer science , programming language
— Electron paramagnetic resonance spectra of the triplet states of several triphenylmethane dyes in glassy solutions at 90 K have been measured and their zero‐field splitting parameters estimated. Crystal violet and para rosaniline do not possess trigonal symmetry in their triplet states, and the unusually broad absorptions in the Δ M 8 = 1 region of the spectra have been attributed to the presence of different rotational isomers of the dye cations. A number of malachite green derivatives were investigated, but absorption of the triplet states of these dyes was only observed in the low field Δ M 8 = 2 region of the spectrum.