Comparison of the dehalogenation of polyhalomethanes and production of strong acids in aqueous and salt (NaCl) water environments: Ultraviolet photolysis of CH2I2

Xiangguo Guan; Yong Du; Yun Liang Li; Wai Ming Kwok; David Lee Phillips

doi:10.1063/1.1803508

Comparison of the dehalogenation of polyhalomethanes and production of strong acids in aqueous and salt (NaCl) water environments: Ultraviolet photolysis of CH₂I₂

Xiangguo Guan, Yong Du, Yun Liang Li, Wai Ming Kwok, David Lee Phillips

Research output: Journal article publication › Journal article › Academic research › peer-review

11 Citations (Scopus)

Abstract

The ultraviolet photolysis of CH2I2was studied in water and salt water solutions using photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both types of environments produces mainly CH2(OH)2and HI products. However, photolysis of CH2I2in salt water leads to the formation of different products/intermediates (CH2ICl and Cl2-) not observed in the absence of salt in aqueous solutions. The amount of CH2(OH)2and HI products appears to decrease after photolysis of CH2I2in salt water compared to pure water. We briefly discuss possible implications of these results for photolysis of CH2I2and other polyhalomethanes in sea water and other salt aqueous environments compared to nonsalt water solvated environments.

Original language	English
Pages (from-to)	8399-8409
Number of pages	11
Journal	Journal of Chemical Physics
Volume	121
Issue number	17
DOIs	https://doi.org/10.1063/1.1803508
Publication status	Published - 1 Nov 2004
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.1803508

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abstract = "The ultraviolet photolysis of CH2I2was studied in water and salt water solutions using photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both types of environments produces mainly CH2(OH)2and HI products. However, photolysis of CH2I2in salt water leads to the formation of different products/intermediates (CH2ICl and Cl2-) not observed in the absence of salt in aqueous solutions. The amount of CH2(OH)2and HI products appears to decrease after photolysis of CH2I2in salt water compared to pure water. We briefly discuss possible implications of these results for photolysis of CH2I2and other polyhalomethanes in sea water and other salt aqueous environments compared to nonsalt water solvated environments.",

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Comparison of the dehalogenation of polyhalomethanes and production of strong acids in aqueous and salt (NaCl) water environments: Ultraviolet photolysis of CH₂I₂. / Guan, Xiangguo; Du, Yong; Li, Yun Liang et al.
In: Journal of Chemical Physics, Vol. 121, No. 17, 01.11.2004, p. 8399-8409.

Research output: Journal article publication › Journal article › Academic research › peer-review

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T1 - Comparison of the dehalogenation of polyhalomethanes and production of strong acids in aqueous and salt (NaCl) water environments: Ultraviolet photolysis of CH2I2

AU - Guan, Xiangguo

AU - Du, Yong

AU - Li, Yun Liang

AU - Kwok, Wai Ming

AU - Phillips, David Lee

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AB - The ultraviolet photolysis of CH2I2was studied in water and salt water solutions using photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both types of environments produces mainly CH2(OH)2and HI products. However, photolysis of CH2I2in salt water leads to the formation of different products/intermediates (CH2ICl and Cl2-) not observed in the absence of salt in aqueous solutions. The amount of CH2(OH)2and HI products appears to decrease after photolysis of CH2I2in salt water compared to pure water. We briefly discuss possible implications of these results for photolysis of CH2I2and other polyhalomethanes in sea water and other salt aqueous environments compared to nonsalt water solvated environments.

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Comparison of the dehalogenation of polyhalomethanes and production of strong acids in aqueous and salt (NaCl) water environments: Ultraviolet photolysis of CH₂I₂

Abstract

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