Title of article :
Di-ionizable p-tert-butylcalix[4]arene-1,2-crown-4 ligands: synthesis and high divalent metal ion extraction selectivity
Author/Authors :
Tu، نويسنده , , Chuqiao and Surowiec، نويسنده , , Kazimierz and Bartsch، نويسنده , , Richard A.، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2006
Abstract :
Di-ionizable p-tert-butylcalix[4]arene-1,2-crown-4 ethers in the cone conformation are synthesized with their conformation and regioselectivity verified by NMR spectroscopy. The new ligands are efficient extractants with high selectivity for Ba2+ in competitive solvent extraction of alkaline earth metal cations from aqueous solutions into chloroform.
Keywords :
Crown ether , Solvent extraction , Alkaline earth metal cations , Calixarene
Journal title :
Tetrahedron Letters
Journal title :
Tetrahedron Letters
