Comparison of the dehalogenation of dihalomethanes (CH2XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments

Yong Du; Xiangguo Guan; Wai Ming Kwok; Lai Man Chu; David Lee Phillips

doi:10.1021/jp0504928

Comparison of the dehalogenation of dihalomethanes (CH₂XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments

Yong Du, Xiangguo Guan, Wai Ming Kwok, Lai Man Chu, David Lee Phillips

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

12 Citations (Scopus)

Abstract

The ultraviolet photolysis of low concentrations of CH2XI (X = Cl, Br, I) were investigated in water and saltwater solutions by photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both kinds of solutions formed mostly CH2(OH)2and HI and HX products. However, photolysis of the CH2XI molecules in saltwater resulted in production of some CH2XCl products not observed in aqueous solutions without salt present. The appearance of these new products in saltwater solutions is accompanied by a decrease in the amount of CH2(OH)2, HI, and HX products compared to photolysis in aqueous solutions without salt present. The possible implications for photolysis of CH2XI and other polyhalomethanes in seawater and other salt aqueous environments compared to nonsaltwater solvated environments is briefly discussed.

Original language	English
Pages (from-to)	5872-5882
Number of pages	11
Journal	Journal of Physical Chemistry A
Volume	109
Issue number	26
DOIs	https://doi.org/10.1021/jp0504928
Publication status	Published - 7 Jul 2005
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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10.1021/jp0504928

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title = "Comparison of the dehalogenation of dihalomethanes (CH2XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments",

abstract = "The ultraviolet photolysis of low concentrations of CH2XI (X = Cl, Br, I) were investigated in water and saltwater solutions by photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both kinds of solutions formed mostly CH2(OH)2and HI and HX products. However, photolysis of the CH2XI molecules in saltwater resulted in production of some CH2XCl products not observed in aqueous solutions without salt present. The appearance of these new products in saltwater solutions is accompanied by a decrease in the amount of CH2(OH)2, HI, and HX products compared to photolysis in aqueous solutions without salt present. The possible implications for photolysis of CH2XI and other polyhalomethanes in seawater and other salt aqueous environments compared to nonsaltwater solvated environments is briefly discussed.",

author = "Yong Du and Xiangguo Guan and Kwok, {Wai Ming} and Chu, {Lai Man} and Phillips, {David Lee}",

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doi = "10.1021/jp0504928",

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Comparison of the dehalogenation of dihalomethanes (CH₂XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments. / Du, Yong; Guan, Xiangguo; Kwok, Wai Ming et al.
In: Journal of Physical Chemistry A, Vol. 109, No. 26, 07.07.2005, p. 5872-5882.

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

TY - JOUR

T1 - Comparison of the dehalogenation of dihalomethanes (CH2XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments

AU - Du, Yong

AU - Guan, Xiangguo

AU - Kwok, Wai Ming

AU - Chu, Lai Man

AU - Phillips, David Lee

PY - 2005/7/7

Y1 - 2005/7/7

N2 - The ultraviolet photolysis of low concentrations of CH2XI (X = Cl, Br, I) were investigated in water and saltwater solutions by photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both kinds of solutions formed mostly CH2(OH)2and HI and HX products. However, photolysis of the CH2XI molecules in saltwater resulted in production of some CH2XCl products not observed in aqueous solutions without salt present. The appearance of these new products in saltwater solutions is accompanied by a decrease in the amount of CH2(OH)2, HI, and HX products compared to photolysis in aqueous solutions without salt present. The possible implications for photolysis of CH2XI and other polyhalomethanes in seawater and other salt aqueous environments compared to nonsaltwater solvated environments is briefly discussed.

AB - The ultraviolet photolysis of low concentrations of CH2XI (X = Cl, Br, I) were investigated in water and saltwater solutions by photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both kinds of solutions formed mostly CH2(OH)2and HI and HX products. However, photolysis of the CH2XI molecules in saltwater resulted in production of some CH2XCl products not observed in aqueous solutions without salt present. The appearance of these new products in saltwater solutions is accompanied by a decrease in the amount of CH2(OH)2, HI, and HX products compared to photolysis in aqueous solutions without salt present. The possible implications for photolysis of CH2XI and other polyhalomethanes in seawater and other salt aqueous environments compared to nonsaltwater solvated environments is briefly discussed.

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U2 - 10.1021/jp0504928

DO - 10.1021/jp0504928

M3 - Journal article

SN - 1089-5639

VL - 109

SP - 5872

EP - 5882

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 26

ER -

Comparison of the dehalogenation of dihalomethanes (CH₂XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments

Abstract

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