Precision Measurement of the Electron Affinity of Chlorine via High-Resolution Photoelectron Spectroscopy

Shuaiting Yan; Rui Zhang; Chuangang Ning

doi:10.1021/acs.jpclett.4c01821

Precision Measurement of the Electron Affinity of Chlorine via High-Resolution Photoelectron Spectroscopy

J Phys Chem Lett. 2024 Aug 1;15(30):7735-7739. doi: 10.1021/acs.jpclett.4c01821. Epub 2024 Jul 24.

Authors

Shuaiting Yan¹, Rui Zhang¹, Chuangang Ning¹

Affiliation

¹ Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China.

PMID: 39046310
DOI: 10.1021/acs.jpclett.4c01821

Abstract

Chlorine (Cl₂) is a diatomic molecule used as an important industrial gas. However, the electron affinity (EA) of Cl₂, a fundamental parameter for understanding chemical reactions, has no accurate experimental result available. The latest result of the EA value of Cl₂ is 2.50(20) eV reported in 1983. In the present work, we report the precision measurement of the EA of Cl₂ with the successive difference method via the high-resolution photoelectron spectroscopy of cryogenically cold chlorine anions Cl₂^-. The EA of Cl₂ is determined to be 19432(9) cm^-1 or 2.4093(11) eV.