Nitrogen-rich porous polyaminal network as a platform for iodine adsorption through physical and chemical interaction

A series of nitrogen-rich porous polyaminal networks (PANs) with five different linkages were prepared through a facile route from cost-effective starting materials. Each structural unit bears a different number of phenyl and pyrrolyl rings, which are found to be useful for iodine uptake through a physical adsorption mechanism. The PAN3 bearing the 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BDP) units, which could adsorb iodine by both physical and chemical interaction, achieves an efficient iodine capacity up to 2.81g/g. Significantly, these new nitrogen-rich PANs might be useful for capture of other volatile compounds. (c) 2017 Wiley Periodicals, Inc.