Synthesis of Various Calix{[}4]arene Derivatives with Mercaptoalkyl Chains and Their Application in Removing Cr(VI) from Aqueous Solution
Sayin, Serkan and Yildiz, Huseyin Bekir and Eymur, Serkan
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Abstract
Four different mercaptoalkyl-substituted calixarene derivatives
(5,11,17,23-tetra-tert-butyl-25,27-bis(3-mercaptopropoxyl)-26,28-dihydro
xycalix{[}4]arene,
25,27-bis(3-mercaptopropoxyl)-26,28-dihydroxycalix{[}4]arene,
25,27-bis(5-mercaptopentanoxyl)-26,28-dihydroxycalix{[}4]arene and
5,17-di-tert-butyl-11,23-di-carboxyl-26,28-bis(3-mercaptopropoxyl)-25,27
-di-hydroxycalix{[}4]arene) were synthesized. Their structures were
characterized by Fourier transform infrared spectroscopy (FTIR), H-1 and
CC-13 NMR spectroscopy, and elemental analysis techniques. Moreover,
their extraction capabilities at different parameters such as pH,
shaking speed, and shaking time were examined toward dichromate ions.
Results implied that all mercaptoalkyl-substituted calixarene
derivatives showed an extraction capability toward dichromate anion
while the carboxyl-functionalized calixarene-marcapto-alkyl derivative
exhibited the highest extraction capability.... Show more Show less