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|Title: ||The first study about the relationship between the extractability of thiacalixarene derivatives and the position of the coordination binding sites|
|Authors: ||Zhao, Jiang-Lin|
Elsegood, Mark R.J.
Teat, Simon J.
|Issue Date: ||2015|
|Publisher: ||© The Royal Society of Chemistry|
|Citation: ||ZHAO, J-L. et al., 2015. The first study about the relationship between the extractability of thiacalixarene derivatives and the position of the coordination binding sites. Organic & Bimolecular Chemistry, 13 (11), pp. 3476 - 3483|
|Abstract: ||Three organic ionophores (2–4) based on the p-tert-butylthiacalixarene backbone, blocked in the 1,3- alternate conformation, bearing two pyridyl coordinating moieties (ortho for 2, meta for 3 and para for 4),
have been synthesized and characterized in the solid state. The solvent extraction experiments with the metal ions showed that the ability of these derivatives to complex with Ag+ appeared to be largely dependent
on the position of the nitrogen atoms of the pyridyl ring. Two different complexation modes have been confirmed by 1H NMR titration, ionophore 2 armed with two pyridyl moieties, complexed with Ag+
cation through N⋯Ag+⋯S interactions; however, ionophore 3 and ionophore 4, complexed with Ag+ through metal–nitrogen (N⋯Ag+) interactions. The DFT computational studies were consistent with the
experimental findings. These findings will provide us an important rule to design an appropriate thiacalixarene ionophore in the future. Another study on the possibility for application of ionophores 2–4 for the
treatment of waste water containing Cr(VI) and Cr(III), showed that ionophore 3 was useful in the application of the solvent extraction method in selective treatment of waste water containing Cr(VI) and Cr(III)
prior to discharge.|
|Description: ||This article is in closed access, the embargo period will end 20 Jan 2016.|
|Sponsor: ||We would like to thank the OTEC at Saga
University and the International Cooperation Projects of Guizhou Province (no. 20137002. The Royal Society of Chemistry for financial support and the EPSRC for an overseas travel grant to C.R.|
|Version: ||Accepted for publication|
|Publisher Link: ||http://dx.doi.org/10.1039/C4OB02393E|
|Appears in Collections:||Closed Access (Chemistry)|
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