Electronic Structure and Excited State Dynamics of Carbon-chain free radicals

Carbon-chain free radicals such as C-D24 C-D2H and C-D23 C-D2N have been extensively investigated by microwave spectroscopy and radio astronomy。However，他们的电子结构，特别是那些在激动人心的电子国家，他们的反应动力学在细节中没有被理解。本项目旨在揭示这种碳链自由基体的详细情况，以及它们的兴奋电子国家和兴奋的状态动态，我们已经成功地应用了刺激发射泵（SEP）光谱分析，以实现HCCS基础体到地面电子国家中的基础和详细的振动结构，其中包括Rener-Teller交互。目前的结果是预期有价值的基于兴奋的状态振动结构的，但没有分析，还有许多振动波段已经被观察到了，CCS的红外光谱的可见和近红外光谱已经被观察到第一次。这些物种被认为是星际空间中一种重要的自由基。我们已经开发了一个新的微波光学双共振光谱学方案，已成功地应用于近红外区域的CCS基础学研究。Furthermore，我们有一个完全未知的新的无碳链基础学， NC D23 D2 O的传统电子和纯旋转专门方案。它在地面电子状态中的线性是根据观察到的特性进行的。我们有观察到的无碳链自由基分子包含一个nitrogen atom， HC-D24-D2 N， CHCHCN， and-D22-D2C-D23-D2 N by microwave spectroscopy。

Carbon-chain free radicals such as CィイD24ィエD2H and CィイD23ィエD2N have been extensively investigated by microwave spectroscopy and radio astronomy. However, their electronic structures especially those in excited electronic states and their reaction dynamics have not been understood in detail. This project has intended to reveal details of such carbon-chain free radicals, in particular their excited electronic states and excited state dynamics.We have successfully applied stimulated emission pumping (SEP) spectroscopy to the HCCS radical to understand detailed vibronic structure in the ground electronic state, which is subjected to the Renner-Teller interaction. The present results are expected to be valuable to understand the excited state vibronic structure, which has not analyzed yet although many of vibronic bands have been observed.Visible and near infrared spectra of the CCS radical have been observed for the first time. The species has been known to be an important free radical in interstellar space. We have developed a new scheme of microwave-optical double resonance spectroscopy, which has successfully applied to the study of the CCS radical in the near infrared region.Furthermore, we have observed electronic and pure rotational spectra of a completely unknown new carbon-chain free radical, NCィイD23ィエD2O. Its linearity in the ground electronic state has been discussed based on the observed spectra. We have observed carbon-chain free radicals containing a nitrogen atom, HCィイD24ィエD2N, CHCHCN, and HィイD22ィエD2CィイD23ィエD2N by microwave spectroscopy.