Feldman Vladimir I
Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
Int J Mol Sci. 2023 Sep 25;24(19):14510. doi: 10.3390/ijms241914510.
The reactive open-shell species play a very important role in the radiation-induced molecular evolution occurring in the cold areas of space and presumably leading to the formation of biologically relevant molecules. This review presents an insight into the mechanism of such processes coming from matrix isolation studies with a main focus on the experimental and theoretical studies performed in the author's laboratory during the past decade. The radicals and radical cations produced from astrochemically relevant molecules were characterized by Fourier transform infrared (FTIR) and electron paramagnetic resonance (EPR) spectroscopy. Small organic radicals containing C, O, and N atoms are considered in view of their possible role in the formation of complex organic molecules (COMs) in space, and a comparison with earlier results is given. In addition, the radical-molecule complexes generated from isolated intermolecular complexes in matrices are discussed in connection with their model significance as the building blocks for COMs formed under the conditions of extremely restricted molecular mobility at cryogenic temperatures.
反应性开壳层物种在发生于寒冷太空区域的辐射诱导分子演化中起着非常重要的作用，并且可能导致与生物相关分子的形成。本综述深入探讨了来自基质隔离研究的此类过程的机制，主要关注作者实验室在过去十年中进行的实验和理论研究。通过傅里叶变换红外（FTIR）光谱和电子顺磁共振（EPR）光谱对由天体化学相关分子产生的自由基和自由基阳离子进行了表征。鉴于含碳、氧和氮原子的小有机自由基在太空中复杂有机分子（COM）形成中可能发挥的作用，对其进行了研究，并与早期结果进行了比较。此外，还讨论了由基质中分离的分子间复合物产生的自由基 - 分子复合物，以及它们作为在低温下分子迁移率极度受限条件下形成COM的构建块的模型意义。
