New diamino derivatives of p-tert-butylcalix[4]arene for oxyanion recognition: synthesis and complexation studies
We have prepared new diamino derivatives of p-tert-butylcalix[4]arene from the reduction of corresponding amide derivatives. The examination of their recognition abilities towards some selected oxyanions shows that the new calix[4]arene amines are mostly more effective receptors than
their amide derivatives for dichromate anions and nitrite, and capable of extracting these anions in yields as high as 95%. However, neither the calix[4]arene amines nor their corresponding amides were capable of extracting phosphate or nitrate at pH 1.5.
Keywords: calix[4]arene; complexation; diamines; extraction; oxyanions
Document Type: Research Article
Affiliations: 1: Department of Chemistry, Selcuk University, Konya, Turkey 2: Department of Chemical Engineering, Selcuk University, Konya, Turkey
Publication date: 01 September 2009
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