Nitrogen-rich Triptycene-based Organic Porous Materials:Synthesize And Application Research

Nitrogen-rich organic porous polymers have shown excellent performance in the range of applications including CO₂ capture,water purification,heterogeneous catalyst,supercapacitor and organic semiconductors on account of their intrinsic properties such as high surface area,low mass density,easy functionality,high stability and the qualities related to nitrogen doping like enhanced surface polarity,electric conductivity,electron-donor affinity.Herein,we successfully synthesized a series of nitrogen-rich porous materials which can be utilized in different fields.?1?A new kind of nitrogen-rich triptycene-based porous polymer HAT-TP was prepared via introducing hexaazatriphenylene units into triptycene-based microporous polymer by a condensation reaction of hexaaminotriptycene hexachloride and triquinoyl hydrate.It has been completely characterized by regular physical/chemical characterization methods,with high surface area of up to 1224 m² g^-1,expanded?-conjugated system and strong light-harvesting ability,HAT-TP was proven to exhibit manifest photothermal effect.?2?Since hexaazatriphenylene unit was considered as attractive metal ligand,Zn/HAT-TP was obtained by the coordination reaction between HAT-TP and Zn complex.Although HAT-TP showed a better capacity of gas adsorption owing to that some porous strcture was occupied by Zn complex,Zn/HAT-TP still could absorb CO2?273 K,1.0 bar?with the capability of 9.9 wt%and it was obvious that Zn/HAT-TP displayed nice performance as heterogeneous catalysts in CO₂ fixation.?3?Another new kind of nitrogen-rich triptycene-based porous polymer?NTP?was synthesized by the nickel?0?-catalyzed Yamamoto-type Ullmann cross-coupling reaction with plentiful cavity construction and high surface area of up to 1067 m² g^-1.Thanks to the features of expanded conjugated area and nitrogen atoms doping,NTP was demonstrated to be an ideal candidate for gas storage?CO₂ uptake:15.2 wt%at 273 K/1 bar?and iodine adsorption?iodine vapour uptake:180 wt%at 348 K/1 bar?.?4?Triptycene derivative 3 and 4 was synthesized,and their porous structure was constructed by self-assembly.As a consequence,they could be utilized as gas adsorbent just like other hydrogen-bond organic frameworks.