ISSN:
0887-624X
Keywords:
poly(ethylenimine)
;
uranyl ion
;
uranium extraction
;
crosslinkage
;
5-(bromoacetyl)salicylic acid
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Three molecules of 5-(bromoacetyl)salicylate (1) complexed to uranyl UO2+2 ion were crosslinked with branchy poly(ethylenimine) (PEI) in DMSO by alkylation of amino groups of PEI with 1, leading to the formation of UO2(Sal)U3 PEI. Upon demetalation of UO2(Sal)U3 PEI with HCl, apo(Sal)U3 PEI was obtained. Based on the pH dependence of log Kf for UO2(Sal)U3 PEI, it was concluded that each uranyl binding site in UO2(Sal)U3 PEI or apo(Sal)U3 PEI contains three salicylate moieties. In terms of the equilibrium constant for formation of the uranyl complex, apo(Sal)U3 PEI was found to be comparable to or better than the previously reported effective uranophiles. In terms of the rates for the formation of the uranyl complex, however, apo(Sal)U3 PEI was far superior to those other uranophiles. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 2935-2942, 1997
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
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