Vibronic spectrum of cold, gas-phase allyl radicals by multiphoton ionization
Vibronic spectrum of cold, gas-phase allyl radicals by multiphoton ionization
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通过多光子电离获得冷气相烯丙基自由基的电子振动谱
DOI：
10.1021/j100298a004
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
J. Weisshaar
中科院分区：
文献类型：
--
作者：
A. Sappey;J. Weisshaar
中性自由基是气相大气化学、燃烧过程和固相有机反应中重要的中间物质。与稳定分子相比，自由基的几何和电子结构在实验上所知相对较少。电子自旋共振光谱和基体分离自由基的红外和紫外可见吸收光谱1提供了相当多的信息。微波、红外吸收和远红外激光磁共振技术为某些气相自由基提供了高分辨率的光谱信息。气相阴离子的光电子能谱是中性自由基振动频率和结构推断的另一个来源。Hunziker和同事获得了汞光敏产生的各种气相自由基的直接光学吸收光谱。
Introduction Neutral free radicals are important intermediate species in gas-phase atmosphericchemistry, in combustion processes, and in solution-phase organic reactions. As compared to stable molecules, relatively little is known experimentally about the geometric and electronic structure of radical species. Electron spin resonance spectra and infrared and UV-visible absorption spectra of matrix-isolated free radicals1 have provided considerable information. Microwave and infrared absorption2 and far-infrared laser magnetic resonance3 techniques have provided high-resolution spectroscopic information for certain gas-phase radicals. Pho-toelectron spectra of gas-phase anions4 are another source of neutral radical vibrational frequencies and structural inferences. Hunziker and co-workers5 have obtained direct optical absorption spectra of a variety of gas-phase radicals created by Hg photosensitization.