Pulse radiolysis of trans-stilbene in tetrahydrofuran. Spectral shift and decay kinetics of the radical anions in the presence of quaternary ammonium salts

Journal Article · Wed Apr 23 23:00:00 EST 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100400a035· OSTI ID:5741211

Yamamoto, Y; Nishida, S; Ma, X H; Hayashi, K

Pulse radiolysis of trans-stilbene (St) in tetrahydrofuran (THF) solution was carried out in the presence of quaternary ammonium salts, such as Bu/sub 4/NPF/sub 6/, Bu/sub 4/NI, Bu/sub 4/NBPh/sub 4/, CeMe/sub 3/NPF/sub 6/, PhMe/sub 3/NPF/sub 6/, and BzMe/sub 3/NPF/sub 6/ (Bu, butyl; Ce, cetyl; Me, methyl; Ph, phenyl; and Bz, benzyl). The absorption peak of the radical anions, St/sup -/., was shifted to shorter wavelengths in the presence of the salts. The magnitude of the shift depends on the substituent groups of the quaternary ammonium cations. It is suggested that St/sup -/. forms contact ion pairs with the quaternary ammonium cations. The decay rate of St/sup -/. decreases with increasing salt concentration and becomes steady. The rate constants for the neutralization reaction of St/sup -/. with the solvent counterions, THF(H/sup +/), have been determined in the absence and presence of Bu/sub 4/NPF/sub 6/; in the latter case, the reaction occurs between the ion pairs St/sup -/./Bu/sub 4/N/sup +/ and THF(H/sup +/)/PF/sub 6//sup 7/. The results for other aromatic compounds such as biphenyl, anthracene, and pyrene are also presented. Comparison was made with the effect of NaBPh/sub 4/. 17 references, 2 figures, 2 tables.

• Research Organization: Osaka Univ., Japan
• OSTI ID: 5741211
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:9; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTROSCOPY
AMMONIUM COMPOUNDS
AROMATICS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
EXPERIMENTAL DATA
FURANS
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROCARBONS
INFORMATION
KINETICS
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PULSE TECHNIQUES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
REACTION KINETICS
SPECTRA
SPECTROSCOPY
STILBENE
TETRAHYDROFURAN
VISIBLE SPECTRA