The near-UV absorber OSSO and its isomers

Zhuang Wu a, Huabin Wan a, Jian Xu a, Bo Lu a, Yan Lu a, Andre´ K. Eckhardt b, Peter R. Schreiner*b, Changjian Xie c, Hua Guo c and Xiaoqing Zeng *a（曾小庆）

a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.

b Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, Giessen 35392, Germany.

c Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, NM 87131, USA

Chem. Commun., 2018, 54, 4517--4520

Disulfur dioxide, OSSO, has been proposed as the enigmatic “near-UV absorber” in the yellowish atmosphere of Venus. However, the fundamentally important spectroscopic properties and photochemistry of OSSO are scarcely documented. By either condensing gaseous SO or 266 laser photolysis of an S2⋯O2complex in Ar or N2at 15 K,syn-OSSO,anti-OSSO, andcyclicOS(O)S were identified by IR and UV/Vis spectroscopy for the first time. The observed absorptions (λmax) for OSSO at 517 and 390 nm coincide with the near-UV absorption (320–400 nm) found in the Venus clouds by photometric measurements with the Pioneer Venus orbiter. Subsequent UV light irradiation (365 nm) depletessyn-OSSO andanti-OSSO and yields a fourth isomer,syn-OSOS, with concomitant dissociation into SO2and elemental sulfur.

链接：http://pubs.rsc.org/en/Content/ArticleLanding/2018/CC/C8CC00999F#!divAbstract