Observation of Photoelectron Circular Dichroism Using a Nanosecond Laser

被引：17

作者：

Kastner, Alexander ^{[1
,2
]}

Ring, Tom ^{[1
,2
]}

Braun, Hendrike ^{[1
,2
]}

Senftleben, Arne ^{[1
,2
]}

Baumert, Thomas ^{[1
,2
]}

机构：

[1] Univ Kassel, Inst Phys, Heinrich Plett Str 40, D-34132 Kassel, Germany

[2] Univ Kassel, CINSaT, Heinrich Plett Str 40, D-34132 Kassel, Germany

来源：

CHEMPHYSCHEM | 2019年 / 20卷 / 11期

关键词：

Circular dichroism; Chirality; Photoelectron spectroscopy; Femtochemistry; Laser chemistry; MULTIPHOTON IONIZATION; MOLECULES; DYNAMICS; KETONES;

D O I：

10.1002/cphc.201900289

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photoelectron circular dichroism (PECD) is a fascinating phenomenon both from a fundamental science aspect but also due to its emerging role as a highly sensitive analytic tool for chiral recognition in the gas phase. PECD has been studied with single-photon as well as multi-photon ionization. The latter has been investigated in the short pulse limit with femtosecond laser pulses, where ionization can be thought of as an instantaneous process. In this contribution, we demonstrate that multi-photon PECD still can be observed when using an ultra-violet nanosecond pulse to ionize chiral showcase fenchone molecules. Compared to femtosecond ionization, the magnitude of PECD is similar, but the lifetime of intermediate molecular states imprints itself in the photoelectron spectra. Being able to use an industrial nanosecond laser to investigate PECD furthermore reduces the technical requirements to apply PECD in analytical chemistry.

引用

页码：1416 / 1419

页数：4

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