Issue 10, 2003

Towards promising oxoanion extractants: azacages and open-chain counterparts

Abstract

The efficiency of a series of amino-azacryptands for encapsulation and extraction of the oxoanions pertechnetate and perrhenate from aqueous solution is investigated and compared with that of their open-chain counterparts. The aqueous formation constants for oxoanion association with the cryptands were determined by pH potentiometry and/or NMR, and X-ray analysis of single crystals provides evidence for encapsulation. The extractabilities could not be explained solely on the basis of ligand lipophilicity; the level of protonation also plays an important role.

Graphical abstract: Towards promising oxoanion extractants: azacages and open-chain counterparts

Supplementary files

Article information

Article type
Paper
Submitted
21 10 2002
Accepted
07 1 2003
First published
23 4 2003

Dalton Trans., 2003, 1961-1968

Towards promising oxoanion extractants: azacages and open-chain counterparts

D. Farrell, K. Gloe, K. Gloe, G. Goretzki, V. McKee, J. Nelson, M. Nieuwenhuyzen, I. Pál, H. Stephan, R. M. Town and K. Wichmann, Dalton Trans., 2003, 1961 DOI: 10.1039/B210289G

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