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http://dx.doi.org/10.5012/bkcs.2011.32.11.3855

Structure Optimization of Di-ionizable Calixarene Nano-baskets for Competitive Solvent Extraction of Alkali and Alkaline Earth Metals  

Mokhtari, Bahram (Department of Chemical Engineering, Shahreza Branch, Islamic Azad University)
Pourabdollah, Kobra (Department of Chemical Engineering, Shahreza Branch, Islamic Azad University)
Publication Information
Bulletin of the Korean Chemical Society / v.32, no.11, 2011 , pp. 3855-3860 More about this Journal
Abstract
The competitive solvent extractions of alkali and alkaline earth metals by di-ionizable calix[4]arene nano-baskets were studied using nine conformers of calix[4]arene nano-baskets. The objective of this work is to assess the variation of macrocycle conformation, orientation and position of pendant moieties upon the extraction parameters (efficiency, selectivity and $pH_{1/2}$) of the complexes. The results revealed that alternation of ring conformation in calixarene scaffold affects the solvent extraction parameters towards alkali and alkaline earth metals, while changing the orientation of pendant moieties from ortho- to para- as well as cis- to trans-analogues depicted no changes in those extraction parameters.
Keywords
Nano-basket; Solvent extraction; Conformation; Calix[4]arene; Alkali metal;
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