溴乙烷光电离解离的理论计算和实验  

Experimental and Theoretical Study of Photoionization and Photodissociation of Bromoethane

作　　者：周卫东[1] 盛六四[1] 武国华[1] 高辉[1] 齐飞[1] 张允武[1] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,合肥230026

出　　处：《物理化学学报》1999年第10期948-951,共4页Acta Physico-Chimica Sinica

基　　金：中国博士后科学基金

摘　　要：The photoionization and photodissociation of bromoethane have been studied by using synchrotron radiation.The photoionization efficiency (PIE) curves of some fragments ions are measured.Based on these curves,the ionization potential of C 2H 5Br is determined to be 10.29eV,and the appearance potentials of C 2H 5 + ,CH 2Br +are measured to be 10.60eV,13.2eV respectively.We also have performed G2MP2 calculation on these fragments.According to experimental result and G2MP2 energy,the enthalpy of formation of ions C 2H 5 +,CH 2Br +,C 2H 5Br +,the bond energy of D 0(C 2H 5 +-Br),D 0(-Br),D 0(CH 2Br +-CH 3) have been evaluated.The most possible channels of the dissociation photoionization have been analyzed.The photoionization and photodissociation of bromoethane have been studied by using synchrotron radiation.The photoionization efficiency (PIE) curves of some fragments ions are measured.Based on these curves,the ionization potential of C 2H 5Br is determined to be 10.29eV,and the appearance potentials of C 2H 5 + ,CH 2Br +are measured to be 10.60eV,13.2eV respectively.We also have performed G2MP2 calculation on these fragments.According to experimental result and G2MP2 energy,the enthalpy of formation of ions C 2H 5 +,CH 2Br +,C 2H 5Br +,the bond energy of D 0(C 2H 5 +-Br),D 0(-Br),D 0(CH 2Br +-CH 3) have been evaluated.The most possible channels of the dissociation photoionization have been analyzed.

关 键 词：溴乙烷 同步辐射光电离 G2MP2 光电离 解离 

分 类 号：O623.21[理学—有机化学]