Erben Mauricio F, Romano Rosana M, Della Védova Carlos O
CEQUINOR (CONICET-UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962, 47 esq. 115 (1900) La Plata, Republic of Argentina.
J Phys Chem A. 2005 Jan 20;109(2):304-13. doi: 10.1021/jp045732i.
Total and partial ion yield spectra of chlorocarbonylsulfenyl chloride, ClC(O)SCl, are studied using tunable synchrotron radiation. Multicoincidence techniques, which include photoelectron-photoion coincidence (PEPICO) and photoelectron-photoion-photoion coincidence (PEPIPICO) time-of-flight mass spectrometry, were applied to study the fragmentation dynamics around the S 2p, Cl 2p, C 1s, and O 1s ionization edges. The search for site-specific fragmentation effects showed a definite enhancement of the Cl+ signal at the Cl 2p resonance. However, fragmentation patterns of the PEPICO spectra at the various excitation energies are essentially identical. Evidence for the occurrence of the previously reported charge separation after an ion rearrangement dissociation mechanism was found. Highly charged species were observed in the multicoincidence spectra at K shell transitions, revealing the formation of a highly charged molecular ion.
利用可调谐同步辐射研究了氯羰基硫酰氯（ClC(O)SCl）的总离子产率谱和部分离子产率谱。采用多符合技术，包括光电子-光离子符合（PEPICO）和光电子-光离子-光离子符合（PEPIPICO）飞行时间质谱，研究了S 2p、Cl 2p、C 1s和O 1s电离边缘附近的碎片化动力学。对位点特异性碎片化效应的研究表明，在Cl 2p共振处Cl+信号有明显增强。然而，不同激发能量下PEPICO谱的碎片化模式基本相同。发现了先前报道的离子重排解离机制后电荷分离现象的证据。在K壳层跃迁的多符合谱中观察到了高电荷物种，揭示了高电荷分子离子的形成。
