三氯一氟甲烷分子的正负离了对光解离动力学

Ion-Pair Photodissociation of Trichloromonofluoromethane

存CFCl3分了的同步辐射光激发正负离了解离过程中，利用负离子飞行时间质谱技术观测到了F-和Cl-（包括35Cl-和37Cl-），测最得到了35Cl-和37Cl-在7．75-22．00eV的负离了产额效率谱．实验得到CFCl3-CFCl2＋＋Cl-的离子对解离阈值为7．944-0．04eV．尝试性标识了电子价态到里德堡态跃迁的负离子产额效率谱．通过热化学计算和其它实验数据，讨论了多体离了对解离产生Cl-的动力学过程．

fragments, F- and Cl- including two isotope species 35Cl- and 37Cl-, are observed in the photoexcitations of CFC13. The ion-pair anion efficiency spectra of 35Cl- and 37Cl- are recorded in the photon energy range of 7.75-22.00 eV. The threshold of ion-pair dissociation CFCl3-CFC12＋＋Cl- is experimentally determined to be 7.944-0.04 eV. With the references of the high-resolution photoabsorption spectra reported in the literatures, we make tentative assignments of the electron valence-to-Rydberg transitions. Furthermore, the multibody ion-pair fragmentation processes to Cl- are discussed by comparison between the calculated thermochemical thresholds and the experimental efficiency spectrum.