コイケ　タカヨシ   KOIKE Takayoshi   小池　崇喜    所属   理工学部 総合理工学科    職種   特任准教授
言語種別	英語
発行・発表の年月	2008
形態種別	学術雑誌
査読	査読あり
標題	Photoassisted dehalogenation and mineralization of chloro/fluoro-benzoic acid derivatives in aqueous media
執筆形態	共著
掲載誌名	Journal of Photochemistry and Photobiology, A: Chemistry
巻・号・頁	197(1),pp.115-123
著者・共著者	Hisao Hidaka, Haruo Honjou, Takayoshi Koike, Yoshihiro Mitsutsuka, Toshiyuki Oyama, Nick Serpone
概要	The photoassisted dehalogenation and mineralization of chloro/fluoro-benzoic acid derivs. occurring at the TiO2/H2O interface under oxygen-satd. and UV-light exposure were examd. by UV absorption spectroscopy, ion chromatog. and time-of-flight (TOF) mass spectrometry to identify intermediate products. Contrary to defluorination, dechlorination occurred readily, presumably because of the weaker C-Cl bond relative to the C-F bond. Photodegrdn. through arom. ring cleavage also occurred fairly rapidly followed by the ultimate evolution of CO2 gas through prior formation of formate and bicarbonate species. When neg. inductive effect groups, such as the chloro and fluoro groups, are positioned ortho and para to the carboxylic acid group, as in the 2Cl-4F-BA, 2Cl-6F-BA, and 4Cl-2F-BA derivs., dechlorination was faster than when the chloro group was meta to the carboxylic acid group.