Synthesis And Properties Of Triazinyl Functional Porous Organic Polymer

With the development of science and technology, materials showing significance in human survival and development have attacted considerable attention in academic and industrial sectors, featuring as one of the three pillars of contemporary civilization. In the past decades, the porous organic polymers with their unique structures and properties have been studied as new functional materials with many important applications in heterogeneous catalysis, gas adsorption and separation, and many other areas. Up to now, the crystalline Covalent Organic Polymers(COFs), Conjugated Microporous Polymers(CMPs), Covalent Triazine-Based Frameworks(CTFs), Porous Aromatic Frameworks(PAFs), and many other types of the polymer materials have been synthesized. Due to good thermal stability and chemical stability, the regulation of skeletal structure and pore size, and many other advantages, the porous organic polymer materials have received widespread interests. In this thesis, new porous organic polymers, including covalent porous organic polymer and conjugated backbone microporous polymer, were synthesized and their structures were also characterized. Their properties were further studied according to their structural features.In the third chapter, a carbazole-based triazine organic porous polymer material is successfully prepared by carbazolyl oxidative coupling polymerization. The material was fully characterized with specific surface area of 104.6 m2g-1 and a wide pore size distribution. These nitrogen and oxygen rich materials act as good supports for palladium nanoparticles(Pd NPs) and exhibit excellent catalytic activity towards Suzuki-Miyaura coupling. The presence of the triazine rings on the polymers is beneficial for enhancing the stability of Pd NPs. The polymers could also display good recyclability in C-C coupling reactions.In the fourth chapter, a class of Salen-based metal functional microporous covalent triazine frameworks was prepared using Salen structure as a single building block. And these materials were fully characterized with the specific surface area up to 598 m2g-1 and a very small pore size. The polymer framework displays excellent carbon dioxide uptake capacity at 273 K and 1 bar, which is significantly influenced by the porosity of the framework and functional sites in the skeleton.