Vibronic structure of jet-cooled 2,6-dimethylbenzyl radical: revisited.
We reexamined the vibronic structure of the jet-cooled 2,6-dimethylbenzyl radical that was generated from 1,2,3-trimethylbenzene seeded in a large amount of inert carrier gas helium using a pinhole-type glass nozzle in a corona excited supersonic expansion, from which the vibronically resolved emission spectrum was recorded with a long path double monochromator in the visible region. The spectrum exhibited bands arising from not only the D1 --> D0 transition but also the D2 --> D0 transition, in which transitions the accurate electronic energies of the D2 and D1 states and the revised vibrational mode frequencies in the ground electronic state were obtained by comparison with those from the known data of the precursor and an ab initio calculation.
Lee
Gi Woo
GW
Department of Chemistry and The Chemistry Institute for Functional Materials, Pusan National University, Pusan 609-735, Republic of Korea.
Lee
Sang Kuk
SK