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Volume 479, Nº 1 (2018)
- Ano: 2018
- Artigos: 2
- URL: https://journals.rcsi.science/0012-5008/issue/view/9289
Chemistry
Synthesis of New Photoswitchable Tectons Based on Thiacalix[4]arene Azo Derivatives in the 1,3-Alternate Conformation
Resumo
The paper describes the first synthesis of molecular tectons, a series of ligands based on thiacalix[4]arenes in the 1,3-alternate stereoisomeric form containing photoswitchable azo groups in the side chain and carboxyl groups as potential binding sites for the synthesis of photoswitchable complexes and coordination polymers. In the case of p-tert-butylcalixarenes, the convergent approach is preferred.
31-35
Extraction of Cesium-137 and Americium-241 by Calix[n]arenes from Carbonate-Alkaline Media
Resumo
Trends of cesium-137 and americium-241 extraction from carbonate–alkaline media with p-tert-butylcalix[n]arenes with macrocycles of different size (n = 4, 6, 8), including monofunctional derivatives with lipophilic substituents for increasing their solubility in organic media, were studied. It was demonstrated that O-n-octyl ethers of p-tert-butylcalix[6]arene appeared to be the most efficient extractants for Cs(I) cations, while it was p-tert-butylthiacalix[4]arene for and americium(III) cations.
36-40