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Aggregation of N-Octanoyl-N-phenylhydroxylamine in Carbon Tetrachloride

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Title: Aggregation of N-Octanoyl-N-phenylhydroxylamine in Carbon Tetrachloride
Authors: SAITOH, Tohru Browse this author
TANI, Hirofumi Browse this author →KAKEN DB
KAMIDATE, Tamio Browse this author
WATANABE, Hiroto Browse this author
HARAGUCHI, Kensaku Browse this author
ABE, Shokichi Browse this author
Keywords: Aggregation
reversed micelle
polar parameter
Issue Date: Jun-1993
Publisher: 日本分析化学会
Journal Title: Analytical Sciences
Volume: 9
Issue: 3
Start Page: 345
End Page: 349
Publisher DOI: 10.2116/analsci.9.345
Abstract: The aggregation number of N-octanoyl-N-phenylhydroxylamine (C8-PHA) in carbon tetrachloride was determined on the basis of the extraction equilibria of copper(II) chelate with C8-PHA between aqueous and carbon tetrachloride phases. According to the relation of the distribution ratio of copper(II) with its concentration in the organic phase, the formation of a reversed micelle consisting of approximately 13 C8-PHA molecules was deduced when C8-PHA concentration was greater than 0.1mol dm-3. The Karl Fisher titration results showed that one water molecule was included in the reversed micelle. The polar parameter (ET(1)) of the reversed micelle was determined to be 250kJ mol-1 by measuring absorption spectra of 1-(4-hydroxyphenyl)-2, 4, 6-triphenylpyridinium betaine (HPTPP) as a function of C8-PHA concentration in carbon tetrachloride. The ET(1) value was different from that in carbon tetrachloride, indicating the incorporation of HPTPP into the polar core region where the hydrophilic chelating groups are oriented inward in the reversed micelle. On the basis of the ET(1) values in organic solvents, the polar core region could be regarded as being an alcoholic medium.
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: 谷 博文

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