Photochemistry of Linear and Cyclic Carbon Clusters

研究了冷稀有气体基质中小碳团簇的光诱导分子过程。本项目的目的是确定线性和环状团簇的特定化学反应通道，并利用这些知识识别相关团簇的未知UV/VIS吸收带。在这个项目中，我们发现含有碳的Ne基质在6k的235 nm处的紫外吸收带在235 nm的光子照射下减弱。同时，我们观察到线性C6在1959 cm-1和1199 cm-1处的红外波段同时减弱。从这个观察我们得出结论，紫外波段是归因于线性C6。进一步研究了与基体分离的碳簇的UV和VIS波段的选择性激发，发现了C2在凝聚相中的新电子系统，该系统通过荧光失活显示出与基体相关的特征弛豫通道。

The photoinduced molecular processes of small carbon clusters in cold rare gas matrices are investigated. The purpose of this project is to determine the specific chemical reaction channels of linear and cyclic clusters and to use the knowledge for identification of the unknown UV/VIS absorption bands of the relevant clusters. In this project, we found that the UV absorption band at 235 nm of a carbon-containing Ne matrix at 6 K diminished upon irradiation with 235 nm photons. At the same time, we observed that the IR bands of linear C6 at 1959 cm-1 and 1199 cm-1 diminished concomitantly. Form this observation we concluded that the UV band is attributable to linear C6. Further investigations of the selective excitation of the UV and VIS bands of matrix-isolated carbon clusters lead to a finding of the new electronic system of C2 in a condensed phase that shows a matrix-dependent characteristic relaxation channel through fluorescent deactivations.