Polymeric materials for mercury complexation have been prepared by cross-linking 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane (H(6)Aza222) with alpha,alpha'-dichloro-p-xylene and other multidentate electrophiles. Bulk and microporous p-xylylene-Aza222 were shown to be effective at binding divalent mercury cations from aqueous solutions of HgCl2 or Na2HgI4. The complexants were regenerable using solutions of HCl or Na2S. (C) 2013 Elsevier Ltd. All rights reserved.