Electronic Spectroscopy of Resonantly Stabilized Aromatic Radicals: 1-Indanyl and Methyl Substituted Analogues

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• 作者：Surajit Maity ; Mathias Steglich ; John P. Maier
• 刊名：Journal of Physical Chemistry A
• 出版年：2015
• 出版时间：August 27, 2015
• 年：2015
• 卷：119
• 期：34
• 页码：9078-9084
• 全文大小：428K
• ISSN：1520-5215

文摘

The gas-phase electronic spectra of two resonantly stabilized radicals, 1-indanyl (C₉H₉) and 1-methyl-1-indanyl (C₁₀H₁₁), have been recorded in the visible region using a resonant two-color two-photon ionization (R2C2PI) scheme. The D₁(A鈥? 鈫?D₀(A鈥? origin bands of 1-indanyl and 1-methyl-1-indanyl radicals are observed at 21157 and 20565 cm^鈥?, respectively. The excitation of a鈥?vibrations in the D₁ state is observed up to 鈭?500 cm^鈥? above the origin band in both cases. The experimental assignments are in agreement with DFT and TD-DFT calculations. The R2C2PI spectrum recorded at m/z = 131 amu (C₁₀H₁₁) features three additional electronic transitions at 21433, 21369, and 17989 cm^鈥?, which are assigned to the origin bands of 7-methyl-1-indanyl, 2,3,4-trihydronaphthyl, and methyl-4-ethenylbenzyl radicals, respectively.