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Investigation of para-sulfonatocalix[n]arenes [n = 6, 8] as potential chelates for 230U

Abstract : Literature reports of the efficacy of para-sulfonatocalix[6]- and calix[8]-arenes as U(VI) complexants indicated that they might be useful for in vivo chelation of the novel therapeutic alhpa-emitter 230U. We have studied the complexation of U(VI) with para-sulfonatocalix[6]arene and para-sulfonatocalix[8]arene by time resolved laser induced fluorescence spectroscopy and using competition methods with Chelex resin and 4-(2-pyridylazo)resorcinol in simplified and in biological media. New thermodynamic parameters describing the stability of U(VI)-para-sulfonatocalix[n]arene [n = 6, 8] complexes were obtained. Although the interactions are strong, the complexes do not exhibit sufficient stability to compete with carbonate ions and serum proteins for complexation of U(VI) under physiological conditions.
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Submitted on : Wednesday, January 27, 2010 - 12:39:55 PM
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Gilles Montavon, U. Repinc, C. Apostolidis, F. Bruchertseifer, K. Abbas, et al.. Investigation of para-sulfonatocalix[n]arenes [n = 6, 8] as potential chelates for 230U. Journal- Chemical Society Dalton Transactions, Royal Society of Chemistry, 2010, 39, pp.1366-1374. ⟨10.1039/b918426k⟩. ⟨in2p3-00450808⟩

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