D1→D0 and D2→D0 transitions of the jet-cooled p-chlorobenzyl radical

Vibronic Spectroscopy of Jet-Cooled Benzyl-type Radicals Produced from 2-Fluoro-4-Chlorotoluene by Corona Discharge

“…However, we could not see any evidence of the formation of the 4-chlorobenzyl radical, whose origin band in the D 1 → D 0 transition was reported previously 16 to locate at 21040 cm −1 in the vibronic spectrum. Since the bond dissociation energies 29 of benzylic C-H, phenylic C-Cl and C-F bonds are, respectively, 356, 398, and 519 kJ/mol, the weak C-Cl bond can be easily replaced by C-H bond along with dissociation of the methyl C-H bond by corona discharge.…”

Spectroscopic observation of jet-cooled 2,5-dichlorobenzyl radical generated by corona discharge

“…Hamatani et al [6] extended the study to other isomers and measured lifetimes at the excited electronic states. In another study [7][8][9], extended vibronic assignments of isomeric chlorobenzyl radicals were achieved from observation of vibronic emission spectra using plasma discharge of chlorotoluenes.…”

Rearrangement of Benzyl-type Radical in Corona Discharge of 2,6-Dichlorotoluene

“…Since then, many different types of fluorine-substituted benzyl-type radicals were confirmed by corona discharge of the precursors. 4,[12][13][14][15] Although chlorine-substituted benzyl-type radicals have been recognized to emit much weaker fluorescence in the electronic transition, chlorobenzyl radicals have been investigated through vibronic emission spectra observed with CESE [16][17][18] and laserinduced fluorescence techniques. 19 However, the study on multi-chlorine substituted benzyl radicals has remained very limited because of their characteristics of weak intensity with increasing number of chlorine atoms in the benzene ring.…”