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Acta Phys. -Chim. Sin.  2006, Vol. 22 Issue (06): 761-763    DOI: 10.3866/PKU.WHXB20060623
Spectrum of •HS and Its Reactions with Oxygen in Aqueous Solution
FANG Hao-Jie;DONG Wen-Bo;ZHANG Ren-Xi;HOU Hui-Qi
Institute of Environment Science, Fudan University, Shanghai 200433, P. R. China
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Abstract  The 266 nm laser photolysis formation and chemical behavior of •HS in aqueous solution have been studied by laser photolysis-transient absorption technique. The 266 nm laser photolysis of H2O2 leads to the formation of •OH, which reacts with H2S to produce •HS, while solutions of HS− can also be directly photolyzed with 266 nm laser pulses to produce •HS radical. The transient UV-Vis absorption spectrum of •HS has been attributed to 220~300 nm with a maximum absorption at 220 nm and a shoulder at 250~270 nm. The chemical behavior of •HS is very active in oxygen saturated aqueous solution:•HS will first react with oxygen to form •SO2−, which further reacts with another oxygen molecule with the production of SO2 and •O2−. In acid solution, •O2− immediately protonates to form •HO2.

Key wordsLaser photolysis- transient absorption            HS      Aqueous phase      H2S     
Received: 27 December 2005      Published: 31 May 2006
Corresponding Authors: DONG Wen-Bo;HOU Hui-Qi     E-mail:,
Cite this article:

FANG Hao-Jie;DONG Wen-Bo;ZHANG Ren-Xi;HOU Hui-Qi. Spectrum of •HS and Its Reactions with Oxygen in Aqueous Solution. Acta Phys. -Chim. Sin., 2006, 22(06): 761-763.

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