Study of the transient "free" OH radical generated in HO-HO mixtures by stimulated Raman scattering.

作者信息

Li Fangfang, Ma Zhiwei, Wang Shenghan, Li Tianyu, Sun Chenglin, Li Zhanlong, Men Zhiwei

机构信息

Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.

State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Mar 15;175:246-249. doi: 10.1016/j.saa.2016.12.026. Epub 2016 Dec 20.

DOI:10.1016/j.saa.2016.12.026

PMID:28043068

Abstract

Forward and backward stimulated Raman scattering (SRS) were studied in the HO-HO mixtures by a strong excitation laser with 532nm. Only the backward SRS (BSRS) of the HO-HO system shows an unexpected SRS shoulder peak at around 3600cm, which is similar to the characteristic peak of "free" OH radical. The generation of the "free" OH radical is mainly attributed to the dissociation of hydrogen peroxide (HP) molecules. Simultaneously, the ionization of HP-water clusters generates a part of "free" OH radical under the Laser-induced breakdown (LIB). The interaction of water and HP is also discussed.

摘要