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ヒドロキシシクロヘキサジエニルラジカルの光化学 : 3.安息香酸類

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Title: ヒドロキシシクロヘキサジエニルラジカルの光化学 : 3.安息香酸類
Other Titles: Photochemistry of Hydroxycyclohexadienyl Radicals : 3. Benzoic Acids
Authors: 住吉, 孝1 Browse this author →KAKEN DB
Authors(alt): SUMIYOSHI, Takashi1
Keywords: 短寿命化学種の光化学
安息香酸イ オン
Photochemistry of short lived transients,
Hydroxycyclohexadienyl radical
Benzoic acid
Issue Date: 2019
Publisher: 日本医療大学
Journal Title: 日本医療大学紀要
Journal Title(alt): Bulletin of Japan Health Care College
Volume: 5
Start Page: 29
End Page: 39
Abstract: 水溶液中において安息香酸と9種類のメトキシ置換安息香酸およびそれらの陰イオンがOHラジカルと反応して生成したヒドロキシシクロヘキサジエニルラジカルの光化学反応が,パルスラジオリシス−レーザーフラッシュフォトリシスを組み合わせた方法により研究された.光励起による化学反応は,すべてのヒドロキシシクロヘキサジエニルラジカルにおいて観測されなかった.環炭素上の電荷密度分布の半経験的分子軌道法計算の結果より,電子吸引性の置換基(-COOH)がヒドロキシシクロヘキサジエニルラジカルからのカチオンラジカル生成を抑制していることが強く示唆された.
Photochemical reactions of hydroxycyclohexadienyl radicals of benzoic acid and 9 methoxylated benzoic acids and benzoates produced by the reaction with OH radicals have been studied in aqueous solutions using the combined pulse radiolysis-laser flash photolysis technique. Upon photolysis of hydroxycyclohexadienyl radicals under investigation any chemical reaction has not been observed. It is strongly suggested that the electron withdrawing substituent(-COOH)suppresses the photochemical cation radical production from the hydroxycyclohexadienyl radicals based on the results of semi-empirical molecular orbital calculations of the charge distribution on ring carbons.
Description: 本論文は、日本医療大学紀要編集委員会より許諾を頂いて転載するものです。
This paper was published in Bulletin of Japan Health Care College, Vol. 5, pp. 29-39 and is made available as an electronic reprint with the permission of Japan Health Care College.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 住吉 孝

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