Adsorption of Solute from the Solutions. IV. Adsorption of Benzoic Acids on Graphite
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概要
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The adsorption of 14 monosubstituted benzoic acids, together with 1-naphthoic acid and cyclohexanecarboxylic acid, on graphite from aqueous solutions at 5° was investigated. The adsorption isotherms apparently fitted the Langmuir equation. The logarithmic value of the first equilibrium constant per unit weight of graphite was significantly correlated with plane size of adsorbate molecule, and not with its pK_a and π, the Hansch-Fujita substituent constant. Furthermore, decreasing order of the affinity to graphite was as follows : 1-naphthoic acid>benzoic acid>cyclohexanecarboxylic acid. These results may indicate that adsorbed acids are mostly oriented flat on graphite surface, and plane-to-plane stacking between acid molecule and fused benzene ring plane of graphite seems to be dominant among possible adsorption forces.
- 公益社団法人日本薬学会の論文
- 1970-03-25
著者
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金庭 延慶
School of pharmaceutical Sciences, Showa University
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森口 郁生
School of Pharmaceutical Sciences, Kitasato University
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森口 郁生
School Of Pharmaceutical Sciences Kitasato University
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金庭 延慶
School Of Pharmaceutical Sciences Showa University
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伏見 静夫
School of Pharmaceutical Sciences, Showa University
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伏見 静夫
School Of Pharmaceutical Sciences Showa University
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