The Synthesis of Nitrogen-Containing Calixarene Derivatives and their Interactions with Lead Ions |
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Authors: | Li Wang Honghai Li Zhongliang Jiang Jinying Gu Xianfa Shi |
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Affiliation: | (1) Department of Chemistry, Tongji University, Shanghai, 200092, P. R. China;(2) State Key Laboratory of Coordination Chemistry, Nanjing, 210093, P. R. China |
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Abstract: | Several new nitrogen-containingcalixarene derivatives have been synthesized andtheir ion-binding properties investigated byUV spectroscopy and solventextraction. These derivatives include5,11,17,23-tetra-t-butyl-25,26,27,28-tetrakis(piperidinocarbonylmethoxy)calix[4]arene (5),5,11,17,23,29,35,41,47-octa-t-butyl-49,50,51,52,53,54,55,56-octa(piperidinocarbonylmethoxy)calix[8]arene (6) and5,11,17,23,29,35,41,47-octa-t-butyl-49,50,51,52,53,54,55,56-octa(N,N-diethyl-car-bamoyl-methoxy)calix[8]arene(7). The UV spectra of and 7revealed they had an ability to transform tight lead picrate ionpairs into separated ones by complexationwith Pb2+ in tetrahydrofuran.Both derivatives give 1 : 1 complexes with Pb2+. Extraction studies showed that these derivativescould efficiently extract Pb2+ (as picrate salts) from the aqueous phase into chloroform. Theextractability of these derivatives were also compared with that ofthe oxygen-containing ester derivative calix[8]arene 2 and the other two nitrogen-containingcompounds 8 and 9. |
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Keywords: | calixarene derivatives nitrogen-containing lead ions ion-binding property extraction |
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