Potentiometric Responses of Expanded Porphyrin Incorporated Liquid Membrane Electrodes toward a Series of Inorganic and Organic Anions

Xiao Ming Lin, Kayoko Umezawa, Koji Tohda, Hiroyuki Furuta, Jonathan L. Sessler, Yoshio Umezawa

研究成果: Contribution to journalArticle査読

18 被引用数 (Scopus)

抄録

The potentiometric responses of liquid membrane electrodes based on expanded porphyrins such as sapphyrin, rubyrin and triphenylrosarin, loward a series of organic carboxylates and inorganic anions were investigated. pH titration of these expanded porphyrin based electrodes with and without a guest anion in the sample solution showed that protonation of the expanded porphyrins at the surface of the electrode membrane is a prerequisite for accommodating the guest anions and yielding their potential responses. The electrodes strongly responded to benzoates, but rather less to inorganic anions and saturated aliphatic organic carboxylates. The selectivity sequences for the sapphyrin based electrode were found in some cases to deviate from the Hofmeister series; fluoride preference over chloride and bromide is particularly noted. Interesting responses were observed by the electrodes for discriminating geometrical isomers: hydrogenmaleate over hydrogenfumarate, and positional isomers: phthalate over iso- and terephthalate and trichloroacetate over di- and monochloroacetates.

本文言語英語
ページ(範囲)99-108
ページ数10
ジャーナルanalytical sciences
14
1
DOI
出版ステータス出版済み - 1998
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分析化学

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