Optical spectra of radical-ion products of pulse radiolysis of 10-ethoxy-10-methyl-10-sil-9-oxarophenanthrene

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · High Energy Chemistry

OSTI ID:166698

Shornikov, V V; Krivenko, T V ^[1]; Pankratova, L N ^[2]

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1. Frumkin Institute of Electrochemistry, Moscow (Russian Federation)
2. Moscow State Univ. (Russian Federation)

Optical absorption spectra of transient charged in liquid 10-ethoxy-10-methyl-10-sil-9-oxarophenanthrene (EMSORP) and its solutions (2x10{sup -2} mol/l) in methylcyclohexane, chloroform, dipropylamine, and deuterated ammonia were measured using a pulse radiolysis technique. Absorption bands at 403 and 630 nm for the EMSORP radical anion and those for the monomeric (390 and 580 nm) and dimeric (830 and 1900 nm) radical cations were characterized. It was found that the spectra of the monomeric radical ions correspond to the spectra of similar species in biphenyl solutions. This correspondence is not due to fragmentation of the primary radical ion but perturbation of the phenanthrene molecule conjugation by the siloxane group. The effect of conformation of diaryl compounds on the position of the charge-resonance band of the dimeric radical cations was revealed. The bonding energy between the constituents of the ENSORP dimeric radical cations was estimated as 0.33 eV.

• OSTI ID: 166698
• Journal Information: High Energy Chemistry, Journal Name: High Energy Chemistry Journal Issue: 5 Vol. 29; ISSN 0018-1439; ISSN HIECAP
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABSORPTION SPECTROSCOPY
CATIONS
CONDENSED AROMATICS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SILICON COMPOUNDS
RADICALS
RADIOLYSIS