Synthesis And Properties Of Heteroatoms-containing Microporous Organic Polymers And Hyperporous Carbon

Microporous organic polymers with pore diameter less than 2 nm have been widely applied to chemistry materials and biological medicine.Herein,we synthesized a series of heteroatom-doped microporous organic polymers and hyperporous carbon via efficient and low-cost synthesis strategy.（1）Using tetraphenylborate sodium,triphenylamine and phenyl sulfide as monomers,seven heteroatom-containing microporous organic polymers were prepared by Friedel-Crafts reaction,named as HCPs-B,HCPs-N,HCPs-S,HCPs-B/N,HCPs-B/S,HCPs-N/S,HCPs-B/N/S.The structures,thermostabilities and morphologies were characterized by different methods,such as ¹³C（CP/MAS）NMR,FT-IR,XRD,TGA,TEM and SEM.Among them,the BET specific surface area of HCPs-B reaches to 717 m²g-1.（2）Owing to excellent BET specific surface areas and pore structures,gas adsorption and iodine capture of these polymers were studied.Among them,HCPs-B/N had preferable performance in gas adsorption and iodine capture.At 273 K/1.0 bar,the carbon dioxide adsorption value of polymers HCPs-B/N was 6.41 wt%,at saturated iodine vapor environment of 75°C,the iodine adsorption amount of HCPs-B/N was 217 wt%.Under the same iodine vapor adsorption experimental conditions,the iodine vapor adsorption value of triptycene-based hypercrosslinked polymer（THPS）was only 180 wt%,the specific surface area of THPS was higher than HCPs-N,HCPs-B/N,HCPs-N/S,however,the iodine adsorption capacities of HCPs-N,HCPs-B/N and HCPs-N/S were higher than that of THPS,indicating that the heteroatoms can improve the iodine adsorption performance of polymers to some extent.（3）Using triptycene-based hypercross-linked porous polymers（THPS）as precursor to prepared hyperporous carbon（THPS-C）by high-temperature pyrolysis.The carbon dioxide uptake of THPS-C was 22.5 wt%at 273 K/1 bar,higher than most reported carbon materials.THPS-C could capture iodine vapor with uptake of 340 wt%under the saturated iodine vapor environment at 75°C,which was higher than most of porous materials,and THPS-C was showed good recyclability.Besides,THPS-C was processed good iodine adsorption capacities in the organic solvent and the aqueous solution.The results were showed that the removal rate of 89%of THPS-C in iodine/hexane solution.The maximum iodine adsorption capacity of THPS-C reached up to 926 mg g^-11 in the aqueous solution,which makes THPS-C has broader development prospect in iodine capture.（4）Due to better specific surface area and negative characteristics,HCPs-B was selected to explore its enrichment ability for alkaloids.Taking berberine hydrochloride as a representative,the experimental results were displayed that the adsorption capacity of HCPs-B for berberine hydrochloride was 180 mg g^-1 due to the strong electrostatic interaction between HCPs-B and berberine hydrochloride.At the same time,HCPs-B also showed outstanding adsorption properties for cationic organic dyes.