Photodissociation dynamics of pyrimidine.
作者： Ming-Fu Lin , Yuri A. Dyakov , Chien-Ming Tseng , Alexander M. Mebel , Sheng Hsien Lin
DOI: 10.1063/1.2174011
关键词: Photoionization 、 Ab initio quantum chemistry methods 、 Product distribution 、 Photodissociation 、 Ion 、 Photochemistry 、 Chemical kinetics 、 Pyrimidine 、 Chemistry 、 Dissociation (chemistry)
摘要: Photodissociation of pyrimidine at 193 and 248nm was investigated separately using vacuum ultraviolet photoionization 118.4 88.6nm multimass ion imaging techniques. Six dissociation channels were observed 193nm, including C4N2H4→C4N2H3+H five ring opening channels, C4N2H4→C3NH3+HCN, C4N2H4→2C2NH2, C4N2H4→CH3N+C3NH, C4N2H4→C4NH2+NH2, C4N2H4→CH2N+C3NH2. Only the first four 248nm. Photofragment translational energy distributions rates indicate that occurs in ground electronic state after internal conversion both wavelengths. The found to be >5×107 1×106s−1 248nm, respectively. Comparison with potential energies from ab initio calculations have been made.
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