Isotopic effects on the control of molecular handedness of H2POSH by ultrashort laser pulses
Isotopic effects on the control of molecular handedness of H2POSH by ultrashort laser pulses
复制标题
超短激光脉冲控制 H2POSH 分子旋向的同位素效应
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
L. González
中科院分区：
文献类型：
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作者：
A. S. Leal;D. Kröner;L. González
翻译后摘要：从一个纯的H2 POSH代表50%：50%的混合物的两种对映异构体与相反的手性的对映异构体开始的选择性制备扩展到其氘代对应物，H2 POSD。使用了一个一维模型，该模型涉及围绕预取向P-S轴的S-H/D的扭转角。设计一个合适的序列的超短红外激光脉冲，以实现分子手性H2 POSH/D是基于两个分子的特征能级分裂和隧穿时间。一个简单的计划，两个线性偏振激光脉冲涉及一个三能级系统用于转换不同的同位素异构体相反的对映异构体，任何给定的混合物的H2 POSH和H2 POSD分子。
Abstract:The selective preparation of an enantiomer starting from a pure state of H2POSH representing a 50%:50% mixture of two enantiomers with opposite chiralities is extended to its deuterated counterpart, H2POSD. A one-dimensional model involving the torsional angle of S-H/D around a pre-oriented P-S axis is used. The design of an appropriate sequence of ultrashort infrared laser pulses to achieve molecular handedness for H2POSH/D is based on the characteristic level splitting and tunneling times of both molecules. A simple scheme of two linearly polarized laser pulses involving a three level system serves to convert the different isotopomers to opposite enantiomers, for any given mixture of H2POSH and H2POSD molecules.