Record number :
1843288
Title of article :
Water-soluble pentasulfonatocalix[5]arene: selective recognition of ditopic trimethylammonium cations by a triple non-covalent interaction
Author/Authors :
Arena، نويسنده , , Giuseppe and Gentile، نويسنده , , Salvatore and Gulino، نويسنده , , Fabio Giuseppe and Sciotto، نويسنده , , Domenico and Sgarlata، نويسنده , , Carmelo، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2004
Pages :
4
From page :
7091
To page :
7094
Abstract :
The inclusion of tetramethylammonium and ditopic trimethylammonium cations by the water-soluble pentasulfonatocalix[5]arene 1 has been studied at neutral pH by 1H NMR and compared with the homologous tetrasulfonatocalix[4]arene 2. Unlike host 2, host 1 selectively binds the ditopic trimethylammonium ions by three different non-covalent interactions. Remarkably the flexible host 1 exhibits both more efficiency and selectivity in the complexation of ditopic methylammonium ions with respect to similar more preorganised calix[4]arene receptors.
Keywords :
Calixarenes , Molecular recognition , Methylammonium cations , Water-soluble receptors
Journal title :
Tetrahedron Letters
Serial Year :
2004
Link To Document :
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