1,2-二甲氧基乙烷的真空紫外光电离和光解离  

Vacuum Ultraviolet Photoionization and Photodissociation of 1,2-Dimethoxyethane

作　　者：王娟[1] 武国华[1] 盛六四[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230029

出　　处：《化学学报》2003年第7期989-993,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.29803008)

摘　　要：利用同步辐射真空紫外光对1,2-二甲氧基乙烷进行光电离解离研究,得到了该分子的电离势为(9.33±0.04)eV,碎片离子CH_3OCH_2CH_3^+和CH_3OCH_2^+的出现势分别为(9.83±0.05)eV,(9.99±0.05)eV.根据实验结果和B3LXP/6-31+G(d)理论计算的结果,分析了可能的解离通道,并得到了离子生成焓、键解离能这些重要的热力学数据.The vacuum ultraviolet photoionization and photodissociation of 1, 2-dimethoxyethane have been studied by using synchrotron radiation. The ionization potential of 1, 2-dimethoxyethane is determined to be (9.33 +/- 0.04) eV. The appearance potentials of the fragments CH3OCH2CH3+ and CH3OCH2+ are found at (9.83 +/- 0.05) and (9.99 +/- 0.05) eV, respectively. According to the experimental results and the energies calculated by B3LYP/6-31 + G (d) theory, the main possible channels of the photodissociation have been analyzed. The enthalpies of formation of the ions CH3OCH2CH2OCH3+, CH3OCH2CH3+ and CH3OCH2+, and the bond energies of D-0(CH3OCH2-CH2OCH3) and D-0(CH3OCH2-CH2OCH3) have been evaluated.

关 键 词：1 2-二甲氧基乙烷 真空紫外光电离 光解离 电离势 出现势 热力学 

分 类 号：O644[理学—物理化学]