Abstract
Isomeric dimethylbenzyl radicals were identified by analysis of the vibronic emission spectrum recorded from the corona excited supersonic expansion through a pinhole-type glass nozzle of precursor 1,2,4-trimethylbenzene seeded in a large amount of carrier gas helium. The visible spectrum showed several vibronic bands reflecting the characteristics of the band shape of each isomer generated. An analysis based on monosubstituted methylbenzyl radicals confirmed that all three of the dimethylbenzyl isomers were formed in the corona discharge of precursor as a result of the removal of a hydrogen atom from the methyl group at the different substitution position. For the three isomeric products, the D1 → D0 electronic transition and the vibrational mode frequencies in the ground electronic state were determined by comparing with those from both an ab initio calculation and the known data of the precursor.
| Original language | English |
|---|---|
| Pages (from-to) | 2341-2345 |
| Number of pages | 5 |
| Journal | Bulletin of the Korean Chemical Society |
| Volume | 29 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2008 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
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Reassignment of isomeric dimethylbenzyl radicals generated by corona discharge of 1,2,4-trimethylbenzene. / Ahn, Hyeon Geun; Lee, Gi Woo; Kim, Tae Kyu; Lee, Sang Kuk.
In: Bulletin of the Korean Chemical Society, Vol. 29, No. 12, 01.01.2008, p. 2341-2345.Research output: Contribution to journal › Article
TY - JOUR
T1 - Reassignment of isomeric dimethylbenzyl radicals generated by corona discharge of 1,2,4-trimethylbenzene
AU - Ahn, Hyeon Geun
AU - Lee, Gi Woo
AU - Kim, Tae Kyu
AU - Lee, Sang Kuk
PY - 2008/1/1
Y1 - 2008/1/1
N2 - Isomeric dimethylbenzyl radicals were identified by analysis of the vibronic emission spectrum recorded from the corona excited supersonic expansion through a pinhole-type glass nozzle of precursor 1,2,4-trimethylbenzene seeded in a large amount of carrier gas helium. The visible spectrum showed several vibronic bands reflecting the characteristics of the band shape of each isomer generated. An analysis based on monosubstituted methylbenzyl radicals confirmed that all three of the dimethylbenzyl isomers were formed in the corona discharge of precursor as a result of the removal of a hydrogen atom from the methyl group at the different substitution position. For the three isomeric products, the D1 → D0 electronic transition and the vibrational mode frequencies in the ground electronic state were determined by comparing with those from both an ab initio calculation and the known data of the precursor.
AB - Isomeric dimethylbenzyl radicals were identified by analysis of the vibronic emission spectrum recorded from the corona excited supersonic expansion through a pinhole-type glass nozzle of precursor 1,2,4-trimethylbenzene seeded in a large amount of carrier gas helium. The visible spectrum showed several vibronic bands reflecting the characteristics of the band shape of each isomer generated. An analysis based on monosubstituted methylbenzyl radicals confirmed that all three of the dimethylbenzyl isomers were formed in the corona discharge of precursor as a result of the removal of a hydrogen atom from the methyl group at the different substitution position. For the three isomeric products, the D1 → D0 electronic transition and the vibrational mode frequencies in the ground electronic state were determined by comparing with those from both an ab initio calculation and the known data of the precursor.
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U2 - 10.5012/bkcs.2008.29.12.2341
DO - 10.5012/bkcs.2008.29.12.2341
M3 - Article
VL - 29
SP - 2341
EP - 2345
JO - Bulletin of the Korean Chemical Society
JF - Bulletin of the Korean Chemical Society
SN - 0253-2964
IS - 12
ER -