Chiroptical inversion for isolated vibronic transitions of supersonic beam-cooled molecules.
Chiroptical inversion for isolated vibronic transitions of supersonic beam-cooled molecules.
复制标题
超音速束冷却分子的孤立电子振动跃迁的手性光学反演。
DOI：
10.1039/c7cp02596c
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
A. Kartouzian
中科院分区：
文献类型：
--
作者：
J. Lepelmeier;J. Alonso;F. Mortaheb;U. Boesl;U. Heiz;A. Kartouzian
利用圆二色共振增强多光子电离（CD- rempi）测量了超音速束冷却(R)-(+)-1-苯乙醇的几个单振动跃迁。由于超声速束内的分子密度较低，且1-苯乙醇在permille区域的各向异性系数较小，因此必须显著提高实验方法的精度。因此，提出了一种结合双峰技术的单激光脉冲评估方法。用单色（1 + 1）CD-REMPI研究了(R)-(+)-1-苯乙醇的电子跃迁S0→S1（苯基环在266 nm处的π→π*跃迁）的十种不同振动模式以及0跃迁。这些结果为分子振动对各向异性因子的影响提供了新的实验见解。TD-DFT理论预测表明，电子跃迁的电子和磁跃迁偶极矩之间的角度可以通过不同的振动模式来修改，甚至可以使各向异性因子的符号翻转。
Circular dichroism-resonance-enhanced multiphoton ionization (CD-REMPI) was used for CD measurements on several single vibronic transitions of supersonic beam-cooled (R)-(+)-1-phenylethanol. Due to the low molecular densities within a supersonic beam and the expected small anisotropy factor of 1-phenylethanol in the permille region, the precision of the experimental method had to be significantly improved. Therefore, a single laser pulse evaluation combined with a twin-peak technique enabled within the used supersonic beam setup is presented. For the electronic transition S0 → S1 of (R)-(+)-1-phenylethanol (π → π* transition of the phenyl ring at 266 nm) ten different vibrational modes as well as the 0-transition were investigated with one-color (1 + 1) CD-REMPI. The results deliver new experimental insights on the influence of molecular vibrations on the anisotropy factor. TD-DFT theoretical predictions show how the angle between the electronic and magnetic transition dipole moments of the electronic transition can be modified by different vibrational modes, making even a flip of the sign of the anisotropy factor possible.
影响因子：
2.9
作者：
Sreerama, N;Woody, RW
通讯作者：
Woody, RW
影响因子：
2.9
作者：
Whitmore, Lee;Wallace, B. A.
通讯作者：
Wallace, B. A.