Building Functional Materials via Self-assembly of Calixazacrowns

Oueslati, Imen

doi:10.1016/j.matpr.2015.04.008

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Cited by 2 publications

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“…Whilst we have tried our best to prepare a comprehensive review article, it is technically impossible for us to cover every piece of published papers, as the “old” papers are too numerous to enumerate and the “new” ones are published in a speed too fast to catch. In an effort to compensate this loss, we herein provide a list of representative papers published recently by different research laboratories in the world in the reference section. − …”

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confidence: 99%

Aggregation-Induced Emission: Together We Shine, United We Soar!

et al. 2015

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Section: Discussionmentioning

confidence: 99%

Aggregation-Induced Emission: Together We Shine, United We Soar!

et al. 2015

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N-Alkyl calix[4]azacrowns for the selective extraction of uranium

et al. 2018

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The selective extraction of uranium by N-octylcalix[4]azacrown (NOCAC) and N-ethylhexylcalix[4]azacrown (NEHCAC) was investigated. The ligands were synthesised in three steps through the functionalisation of t-butyl calix[4]arene at the distal-1,3-positions of the lower rim with ethyl acetate groups followed by cyclisation with (imino)bis(ethane-2,1-diyl)diamide. A detailed investigation on the effect of various parameters, such as the aqueous phase acidity (sulfuric acid), the ionic strength, and ligand concentration, on the extraction of uranium(vi) has been conducted. The effect of the H2SO4 concentration has been studied from 0.02 to 3 M. Preliminary studies carried out on NOCAC in dodecane/octanol diluents showed that the uranium extraction from sulfuric acid is more efficient at a low H2SO4 concentrations. The stoichiometry of complexation was estimated from the slope method, NMR titration, and electrospray ionisation-mass spectrometry analysis. Both ligands were found to be highly selective for uranium(vi) over other competitive cations present in a simulated leach solution containing seven competitive cations. The successful recovery of the uranium from the organic phase has been performed thanks to stripping steps involving ammonium oxalate, ammonium carbonate, and sodium carbonate as stripping agents.

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Building Functional Materials via Self-assembly of Calixazacrowns

Cited by 2 publications

References 48 publications

Aggregation-Induced Emission: Together We Shine, United We Soar!

Aggregation-Induced Emission: Together We Shine, United We Soar!

N-Alkyl calix[4]azacrowns for the selective extraction of uranium

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