Synthesis And Application Of Porous Organic Polymers Based On Schiff Base Chemistry

With the advantages including low density, good stability and high specific area, porous organic polymers have received increasing attention in recent years. Porous organic polymers have been applied in many aspects such as gas storage, catalysis and organic optoelectronics, and might be a potential alternative of traditional inorganic porous materials. Although many methods have been used to the synthesis of porous organic polymers, it is still of great significance to explore new synthetic routes for the further study and development of these materials. In addition, broadening the application fields of porous organic polymers was another hotspot of the related research.This thesis contains four chapters.In chapter one, the history, characterization methods and applications of porous organic polymers were reviewed briefly. More over, the research and application of porous organic polymers based on Schiff base chemistry were also summarized.In chapter two, without the aid of any catalyst or template, a facile method was developed for one-pot synthesis of melamine-based porous organic polymers. The structures and properties of the resulting materials were then systematically characterized by means of FTIR, SEM and N2adsorption and desorption etc. The as-prepared materials under our experiment have high specific surface areas and large pore volume (718m2·g-1,1.10cm3·g-1).Silver nanoparticles were uniformly loaded on the surface of POF-M2T3via in-situ reduction and the prepared POF-M2T3/AgNPs showed excellent catalytic performance for the degradation of methylene blue. Thus, the materials synthesized in this experiment possess good porous stucture and can be used for heterogeneous catalysis.In chapter three, a simple method was established for the synthesis of fluorescent nanoparticles based on the porous organic polymer. A bright fluorescent solution was obtained with shorter reaction time for POF-M2T3and nanoparticles were found in this solution via SEM, TEM and laser dynamic light scatter. Further studies demonstrated that these nanoparticles were composed of smaller particles. Therefore, this method can be employed to synthesize fluorescent nanoparticles. On the other hand, the forming process of POF can be explained by these experimental results to some extent.In chapter four, a new approach has been explored for the synthesis of nitrogen-rich porous carbon using porous organic framework (POF) as precursor and the obtained nitrogen-rich porous carbon was used as a supercapacitor electrode material. Experimental results revealed that the amorphous hollow N-rich carbon particles that prepared from a precursor POF carbonization at800℃(NPC800) had the specific capacitance of230F-g-1at the current density of0.5A·g-1and could also retain-98%of initial capacitance after successive1500times galvanostatic charge-discharge (GCD) test. Therefore, the nitrogen-rich porous carbon that synthesized by this facile method could serve as a promising supercapacitor electrode material.