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Grafting of phosphorus-containing tetrahydroxy(thia)calixarenes on silica enhances europium(III) adsorption.
- Source :
-
Phosphorus, Sulfur & Silicon & the Related Elements . 2023, Vol. 198 Issue 9, p715-722. 8p. - Publication Year :
- 2023
-
Abstract
- One pot sequential reactions of silica gel with tetrachlorosilane/triethylamine mixture and after with the conical upper rim tetraphosphorylated tetrahydroxy(thia)calixarenes yielded porous organo-inorganic sorbents modified by spatially ordered phosphonate, phosphinate or phosphine oxide groups capable of co-operative binding of metal cations. The grafting improves efficacy of europium(III) sorption by the silica gels. DFT calculations of the calixarene-Eu3+ complexes predict a calixarene flattened cone conformation with the coordination of Eu3+ cation to three of four P = O oxygen atoms and one of the aromatic systems. Adding three water molecules excludes completely cation–π interactions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10426507
- Volume :
- 198
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Phosphorus, Sulfur & Silicon & the Related Elements
- Publication Type :
- Academic Journal
- Accession number :
- 169709011
- Full Text :
- https://doi.org/10.1080/10426507.2023.2208705