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ESR and electronic spectra of alkane radical cations formed in el-irradiated 3-methylpentane and 3-methylhexane glasses containing alkane solutes

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100296a028· OSTI ID:6163559
Electron spin resonance (ESR) and optical difference spectra of photobleaching are measured, and the radical cations from some higher alkanes (C9-C11) and some methyl-branched butanes are found to be trapped in 3-methylpentane or 3-methylhexane matrices at 77 K. The ESR spectra show close agreement with those of radical cations produced in CCl2FCClF2 matrices. The cations of methyl-branched butanes give the absorption bands with lambda/sub max/ ranging from 300 to 260 nm and the bands are attributed to sigma-localized cations, while the higher alkane cation bands appearing in the near-IR region are ascribed to sigma-delocalized cations. The cations of higher alkanes are found to be mobilized by light with lambda > 900 nm to recombine with the negative ions formed by electron scavenging.
Research Organization:
Hiroshima Univ., Japan
OSTI ID:
6163559
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:12; ISSN JPCHA
Country of Publication:
United States
Language:
English