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Issue 19, 2014
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Steric hindrance effects in tripodal ligands for extraction and back-extraction of Ag+

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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.

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

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Publication details

The article was received on 10 Oct 2013, accepted on 27 Jan 2014 and first published on 28 Jan 2014


Article type: Paper
DOI: 10.1039/C3RA45700A
Citation: RSC Adv., 2014,4, 9791-9798
  • Open access: Creative Commons BY-NC license
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    Steric hindrance effects in tripodal ligands for extraction and back-extraction of Ag+

    Y. Hiruta, T. Watanabe, E. Nakamura, N. Iwasawa, H. Sato, K. Hamada, D. Citterio and K. Suzuki, RSC Adv., 2014, 4, 9791
    DOI: 10.1039/C3RA45700A

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