硫氰酸甲酯（CH₃SCN）在硫2p边缘附近的离解光电离。
Dissociative photoionization of methyl thiocyanate, CH3SCN, in the proximity of the sulfur 2p edge.
作者信息
Cortés Emiliano, Erben Mauricio F, Geronés Mariana, Romano Rosana M, Della Védova Carlos O
机构信息
CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata (CP 1900), República Argentina.
出版信息
J Phys Chem A. 2009 Jan 22;113(3):564-72. doi: 10.1021/jp807230s.
The dissociative photoionization of gaseous CH3SCN has been investigated at the S 2p core level using time-of-flight mass spectrometry and synchrotron radiation. The total ion yield spectrum could be successfully assigned by comparison with available data from electron energy loss spectra. The relative abundances of the ionic fragments and their kinetic energy release values were obtained from both PEPICO (photoelectron photoion coincidence) and PEPIPICO (photoelectron photoion photoion coincidence) spectra. The dynamics of the ionic fragmentation of S 2p excited CH3SCN is dominated by the rupture of both carbon-sulfur bonds. This process may be related with electronic excitations from the ground electronic state to vacant sigma* molecular orbitals.
利用飞行时间质谱和同步辐射，在硫2p芯能级上研究了气态CH3SCN的离解光电离。通过与电子能量损失谱的现有数据进行比较，成功地确定了总离子产率谱。离子碎片的相对丰度及其动能释放值是从光电离光电子符合（PEPICO）和光电离光电子光离子符合（PEPIPICO）光谱中获得的。硫2p激发的CH3SCN离子碎裂动力学主要由碳硫键的断裂主导。这一过程可能与从基态电子态到空的σ*分子轨道的电子激发有关。
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