Formation of free radicals and their structures

这个项目的目的是为了了解自由基的形成及其结构。重点研究了(1)通过同步辐射和激光产生的光吸收激发分子的解离，(2)通过电子-分子碰撞产生的激发分子的解离，(3)自由基与分子的反应，(4)新自由基的高分辨光谱。各种新发展的实验方法提供了许多关于自由基的形成和结构的信息如下：Hatano通过测量二维发射光谱和光吸收绝对值，获得了关于超激发分子解离动力学的详细信息，利用激光引发的半反应技术研究了几何构型对反应动力学的影响。Ebata成功地分析了CO的高(n*5)里德堡态的转动结构，并结合双共振激发研究了它们的预解离过程。Endo用脉冲放电喷嘴方法对自由基络合物和分子离子络合物进行了高分辨光谱，揭示了它们的结构和分子间的电势。Mikami用IR-UV双共振光谱测定了苯酚与不同溶剂分子氢键络合物的结构。

This project was carried out for the purpose of understanding the formation of free radicals and their structures. Emphasis was placed on studies of (1) dissociation of excited molecules produced by photoabsorption by means of synchrotron radiation and lasers, (2) dissociation of excited molecules produced through electron-molecule collisions, (3) reactions of free radicals with molecules, (4) high-resolution spectroscopy of new free radicals. A variety of newly developed experimental methods provided much information on the formation and structure of free radicals as follows.Hatano obtained detailed information on dissociation dynamics of superexcited molecules through measurements of the two-dimensional emission spectra and absolute values of photoabsorption, photoionization and neutral-dissociation cross sections.Honma studied effects of geometry on the reaction dynamics by employing the laser-initiated half-reaction technique.Ebata succeeded in analyzing rotational structure of high (n * 5) Rydberg states of CO and studying their predissociation process by using photofragment yield spectroscopy combined with double resonant excitation.Endo carried out high resolution spectroscopy of radical complexes and molecular ion complexes by using pulsed discharge nozzle method and revealed their structures and intermolecular potentials.Mikami determined the structures of hydrogen-bonded complexes of phenol with various solvent molecules by means of IR-UV double resonance spectroscopy.