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Grafting of phosphorus-containing tetrahydroxy(thia)calixarenes on silica enhances europium(III) adsorption.

Authors :
Boiko, Yuriy
Belikov, Konstantin
Bryleva, Ekaterina
Bunina, Zinaida
Varchenko, Victoria
Rozhenko, Alexander B.
Drapailo, Andriy
Rodik, Roman
Golub, Alexander
Katz, Alexander
Kalchenko, Vitaly
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