Steric hindrance effects in tripodal ligands for extraction and back-extraction of Ag+

Yuki Hiruta, Takafumi Watanabe, Etsuko Nakamura, Naoko Iwasawa, Hiroyasu Sato, Kensaku Hamada, Daniel Citterio, Koji Suzuki

Research output: Contribution to journalArticle

Abstract

A novel series of tripodal ligands with thiophenylether arms connected to an anchoring nitrogen has been investigated. Seven tripodal ligands were synthesized by combining methyl, isopropyl, and tert-butyl residue bearing thiophenylether sites as groups with different steric hindrance effects. The tripodal ligands allowed for the extraction of Ag+ ions from the aqueous phase into a chloroform phase by forming 1:1 complexes with Ag +. Back-extraction was performed with 1 M HNO3 aqueous solution. Each ligand showed different extraction and back-extraction efficiency for Ag+, affected by changes in steric hindrance caused by the various combinations of sidearms. These results are further supported by X-ray single crystal structural analysis.

Original languageEnglish
Pages (from-to)9791-9798
Number of pages8
JournalRSC Advances
Volume4
Issue number19
DOIs
Publication statusPublished - 2014

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Hiruta, Y., Watanabe, T., Nakamura, E., Iwasawa, N., Sato, H., Hamada, K., Citterio, D., & Suzuki, K. (2014). Steric hindrance effects in tripodal ligands for extraction and back-extraction of Ag+. RSC Advances, 4(19), 9791-9798. https://doi.org/10.1039/c3ra45700a