Slow Photoelectron Velocity-Map Imaging Spectroscopy of the ortho-Hydroxyphenoxide Anion

被引：12

作者：

Weichman, Marissa L. ^{[1
]}

Kim, Jongjin B. ^{[1
]}

Neumark, Daniel M. ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2015年 / 119卷 / 23期

基金：

美国国家科学基金会;

关键词：

AB-INITIO; NEGATIVE-IONS; PHENOLIC ANTIOXIDANTS; ELECTRON-AFFINITIES; EXCITED-STATES; PHOTODETACHMENT; SEMIQUINONE; PHOTODISSOCIATION; ENTHALPIES; ENERGETICS;

D O I：

10.1021/acs.jpca.5b00768

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 high-resolution photodetachment spectra of cryogenically cooled ortho-hydroxyphenoxide anions (o-HOC6H4O-) using slow photoelectron velocity-map imaging spectroscopy (cryo-SEVI). We observe transitions to the three lowest-lying electronic states of the ortho-hydroxyphenoxy radical, and resolve detailed vibrational features. Comparison to Franck-Condon simulations allows for clear assignment of vibronic structure. We find an electron affinity of 2.3292(4) eV for the neutral (X) over tilde (2)A '' ground state, improving upon the accuracy of previous experiments. We measure term energies of 1.4574(7) eV and 1.5922(48) eV for the (A) over tilde (2)A' and (B) over tilde (2)A '' excited states respectively, representing their first resolution and clear assignment. Photodetachment threshold effects are considered to explain the structure of these bands.

引用

页码：6140 / 6147

页数：8