Optimal control of photoisomerization.
Optimal control of photoisomerization.
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DOI：
10.1103/physrevlett.94.068305
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发表时间：
2005-02
影响因子：
8.6
通讯作者：
G. Vogt;G. Krampert;P. Niklaus;P. Nuernberger;Gustav Gerber
中科院分区：
文献类型：
--
作者：
G. Vogt;G. Krampert;P. Niklaus;P. Nuernberger;Gustav Gerber
报道了3，3-二乙基-2，2-硫氰酸碘在甲醇中光异构化反应的优化控制。提高和降低了顺反异构体的相对产率，即利用最佳的相位和幅度整形400 nm飞秒激光脉冲来控制光异构化的量子效率。像啁啾或强度变化这样的单参数控制方案不能改变光产物的比例。分子结构的成功修饰可以被视为在光化学中朝着可控的立体选择性迈出的第一步。
We report on optimal control of the photoisomerization of 3,3-diethyl-2,2-thiacyanine iodide dissolved in methanol. Enhancement and reduction of the relative yield of cis to trans isomers are achieved; i.e., the quantum efficiency of the photoisomerization is controlled with optimally phase and amplitude shaped 400 nm femtosecond laser pulses. Single-parameter control schemes, like chirp or intensity variation, fail to change the ratio of the photoproducts. The successful modification of the molecular structure can be regarded as a first step towards controlled stereoselectivity in photochemistry.