このエントリーをはてなブックマークに追加
ID 19965
Eprint ID
19965
フルテキストURL
著者
高柳 俊夫 岡山大学
Ohba Yoshitaka 岡山大学
Haruki Hiroko 岡山大学
Wada Eiko 岡山大学
本水 昌二 岡山大学
抄録
The ion-association properties of monovalent and divalent naphtholsulfonate ions were investigated with tetrabutylammonium ion (TBA(+)) as a pairing ion in an aqueous solution. The ion-association constants were obtained by analyzing the change in the electrophoretic mobility of naphtholsulfonate ions in the presence of TBA+ by capillary zone electrophoresis; also, the contribution of a hydroxyl group to the ion associability of monovalent and divalent naphtholsulfonate ions, as well as the electrophoretic mobility of the ions, was investigated. The obtained ion-association constants indicate that the positional isomers possessing anionic groups at the β-position of the naphthalene ring are more associable with TBA(+) than those at the α-position, and that the ion associability of the divalent naphtholsulfonates is larger than those of the monovalent ones, except for 1-naphthol-2-sulfonate. The abnormal associability of 1-naphthol-2-sulfonate can be explained by a synergistic increase in the hydrophilicity of the divalent ion. The difference in the ion associability between the monovalent and divalent naphtholsulfonates, 0.16 in log unit on the average, was smaller than that between the naphthalenesulfonate and naphthalenedisulfonate ions, 0.30 log unit on the average. The electrophoretic mobility of the naphtholsulfonate ions obtained in the absence of TBA(+) is compared with each other, and the contribution of the hydroxyl group is discussed on the basis of the hydration behavior of the naphtholsulfonates.
キーワード
Ion association
aqueous solution
naphtholsulfonate
capillary zone electrophoresis
tetrabutylammonium ion
発行日
1998-04-10
出版物タイトル
Analytical Sciences
14巻
2号
出版者
日本分析化学会
出版者(別表記)
Japan Society for Analytical Chemistry
開始ページ
311
終了ページ
315
ISSN
0910-6340
NCID
AA10500785
資料タイプ
学術雑誌論文
オフィシャル URL
http://www.jstage.jst.go.jp/article/analsci/14/2/14_311/_article
言語
English
著作権者
日本分析化学会
論文のバージョン
publisher
査読
有り
DOI