Lin Shu-Yu, Chou Sheng-Lung, Tseng Chien-Ming, Wu Yu-Jong
Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan.
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Aug 5;276:121233. doi: 10.1016/j.saa.2022.121233. Epub 2022 Apr 6.
Electron bombardment of aniline (PhNH) in an Ar matrix mainly generated the aniline cation (PhNH), anilino (PhNH) and phenyl (Ph) radicals, and phenylnitrene (PhN). Further irradiation of the electron-bombarded matrix sample at 365 nm depleted PhNH and PhN, and resulted in the formation of PhNH, PhNH, and Ph. In separate experiments, irradiation of the PhNH/Ar matrix samples at 265 or 160 nm mainly generated PhNH and Ph radicals, but without the formation of PhNH and PhN. According to the observed photochemical behaviors, quantum-chemically predicted harmonic vibrational wavenumbers of each species, and the information reported in previous photodissociation studies, we unambiguously characterized the IR features of the aromatic species. The information of the vibrational fundamentals of PhNH is new and the formation mechanism is discussed.
在氩气基质中对苯胺（PhNH）进行电子轰击主要产生苯胺阳离子（PhNH）、苯胺基（PhNH）和苯基（Ph）自由基以及苯基亚硝基（PhN）。在365nm波长下对电子轰击后的基质样品进行进一步辐照，消耗了PhNH和PhN，并导致形成了PhNH、PhNH和Ph。在单独的实验中，在265或160nm波长下对PhNH/Ar基质样品进行辐照主要产生PhNH和Ph自由基，但未形成PhNH和PhN。根据观察到的光化学行为、量子化学预测的各物种的谐波振动波数以及先前光解离研究中报道的信息，我们明确表征了芳香族物种的红外特征。PhNH振动基频的信息是新的，并对其形成机制进行了讨论。
