Observation and Exploitation of Spin-Orbit Excited Dipole-Bound States in Ion-Molecule Clusters

被引：8

作者：

Cao, Wenjin ^{[1
]}

Zhang, Hanhui ^{[1
,2
]}

Yuan, Qinqin ^{[1
]}

Zhou, Xiaoguo ^{[2
]}

Kass, Steven R. ^{[3
]}

Wang, Xue-Bin ^{[1
]}

机构：

[1] Pacific Northwest Natl Lab, Phys Sci Div, Richland, WA 99352 USA

[2] Univ Sci & Technol China, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[3] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2021年 / 12卷 / 45期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

GAS-PHASE; BASIS-SETS; PHOTOELECTRON-SPECTROSCOPY; DENSITY FUNCTIONALS; ELECTRON; MODEL; TRANSITION; RESOLUTION; AFFINITY; ARGININE;

D O I：

10.1021/acs.jpclett.1c03309

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：

We report an observation of spin-orbit excited dipole-bound states (DBSs) in arginine-iodide complexes (Arg.I-) by using temperature dependent, wavelength-resolved "iodide-tagging" negative ion photoelectron spectroscopy. The observed DBSs are bound to the spin-orbit excited I(P-2(1/2)) level of the neutral ArgmiddotI complex in zwitterionic conformations and identified based on the resonant enhancement due to spin-orbit electronic autodetachment from the I(P-2(1/2)) DBS to the I(P-2(3/2)) neutral ground state. The observed DBS binding energies are correlated to the dipole moments of neutral ArgmiddotI isomers and tautomers. This work thus demonstrates a new and generic spectroscopic approach to identify ion-molecule cluster conformations based on their distinguishable dipole moments.

引用

页码：11022 / 11028

页数：7

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