Study of the transient “free” OH radical generated in H₂O-H₂O₂ mixtures by stimulated Raman scattering

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• 作者：Fangfang Li^a ; Zhiwei Ma^a ; Shenghan Wang^a ; Tianyu Li^a ; Chenglin Sun^a ; Zhanlong Li^b ; ^{zlli@jlu.edu.cn} ; Zhiwei Men^a ; ^{zwmen@jlu.edu.cn}
• 关键词：&ldquo ; Free&rdquo ; OH radical ; H2O-H2O2 ; Stimulated Raman scattering ; Laser-induced breakdown
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：175
• 期：Complete
• 页码：246-249
• 全文大小：571 K
• 卷排序：175

文摘

An unexpected backward stimulated Raman scattering peak of the “free” OH radical was observed. The dissociation of H2O2 under the laser and proton transformation of H2O2(H2O)1−n clusters can generate “free” OH radical. The mechanism explains the increase of Raman scattering cross section of the “free” OH radical. The mechanism also solves the change of the frequency shift of the OH Raman band with the change of the concentration.