As eries of calix [4]pyrrole-based crosslinked polymer networks designed for iodine capture is reported. These materials were prepared by Sonogashira coupling of a,a,a,atetra(4-alkynylphenyl)calix [4]pyrrole with bishalide building blocks with different electronic properties and molecular sizes. Despite their low Brunauer-Emmett-Teller surface areas, iodine vapor adsorption capacities of up to 3.38 gg À1 were seen, af inding ascribed to the presence of al arge number of effective sorption sites including macrocyclic p-rich cavities, aryl units,a nd alkyne groups within the material. One particular system, C[4]P-BTP,was found to be highly effective at iodine capture from water (uptake capacity of 3.24 gg À1 from ac oncentrated aqueous KI/I 2 solution at ambient temperature). Fast capture kinetics (k obs = 7.814 gg À1 min À1 ) were seen. Flow-through adsorption experiments revealed that C[4]P-BTP is able to remove 93.2 %o fi odine from an aqueous source phase at aflow rate of 1mLmin À1 .
As eries of calix [4]pyrrole-based crosslinked polymer networks designed for iodine capture is reported. These materials were prepared by Sonogashira coupling of a,a,a,atetra(4-alkynylphenyl)calix [4]pyrrole with bishalide building blocks with different electronic properties and molecular sizes. Despite their low Brunauer-Emmett-Teller surface areas, iodine vapor adsorption capacities of up to 3.38 gg À1 were seen, af inding ascribed to the presence of al arge number of effective sorption sites including macrocyclic p-rich cavities, aryl units,a nd alkyne groups within the material. One particular system, C[4]P-BTP,was found to be highly effective at iodine capture from water (uptake capacity of 3.24 gg À1 from ac oncentrated aqueous KI/I 2 solution at ambient temperature). Fast capture kinetics (k obs = 7.814 gg À1 min À1 ) were seen. Flow-through adsorption experiments revealed that C[4]P-BTP is able to remove 93.2 %o fi odine from an aqueous source phase at aflow rate of 1mLmin À1 .
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