Properties of dendritic and cyclic thiourea derivatives as neutral carriers for anion sensors

Sachie Uchida*, Yuichiro Komatsu, Hitomi Satoh, Setsuko Yajima, Keiichi Kimura, Tobe Yoshito, Shin Ichi Sasaki, Masaaki Mizuno, Yohei Watanabe, Keiji Hirose

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We desinged seven neutral carriers for hydrophilic anion sensors: four compounds containing one thiourea group and dendritic benzyl ether derivatives, two compounds containing three or four thiourea groups, and a cyclic compound containing three thiourea groups. The association constants with dihydrogen phosphate ion for these thiourea derivatives were determined in organic solvents. The compounds exhibited high association constants with dihydrogen phosphate ion. When these compounds were used as neutral carriers of ion-selective electrodes (ISEs) for phosphate ion, the slopes of the EMF responses were very small in all cases. The ISEs showed better EMF responses for sulfate ion than for phosphate ion. Especially in the case that dendritic and cyclic derivatives containing three thiourea groups were used as neutral carriers, the ISEs exhibited excellent EMF responses for sulfate ion and anion selectivities.

Original languageEnglish
Pages (from-to)943-952
Number of pages10
JournalBunseki Kagaku
Volume53
Issue number9
DOIs
StatePublished - 1 Sep 2004

Keywords

  • Anion-selective electrodes
  • Dendritic and cyclic thiourea derivatives
  • Neutral carriers
  • Sulfate ion

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