Synthesis And Properties Of Organic Microporous Polymers Based On Silole

In recent decades,the rapid development of the industry,coal,oil and natural gas combustion emissions of carbon dioxide emissions caused the greenhouse effect will have serious consequences.The existing carbon dioxide capture and separation technology has the advantages of high cost,large energy consumption and serious corrosion of equipment.Microporous organic polymer is a new type of porous material,which has the advantages of large specific surface area,low skeleton density,adjustable pore size,stable chemical and physical properties and various synthetic strategies.MOPs has shown great potential in capturing and storing carbon dioxide,which has become one of the research hotspots in recent years.Siloles or silacyclopentadienes are a group of five-membered silacyclics that possess a unique low-lying LUMO level associated with?^*-?^*conjugation.Siloles exhibit some attractive features such as high electron acceptability,fast electron mobility,aggregation-induced emission?AIE?and highly efficient photoluminescence?PL?.Recently studies have shown that siloles have become valuable aromatic heterocycles to construct various functional polymers.It has been widely used in many fields,such as photoelectric materials,chemical sensing,biological detection,sensing and imaging.However,there are few reports on the adsorption of carbon dioxide gas from organic porous polymers based on the synthesis of silicone.With these considerations in mind,we rationally designed a serises kinds of silole-containing microporous organic polymers,such as HCPs and CMPs.The adsorption properties of the polymers and structure were characterized and studied.The full text mainly includes the following contents:?1?Threehypercrosslinkedpolymernetworksfrom triphenylamine-functionalized silole building blocks via Friedel-Crafts alkylation catalyzed by anhydrous FeCl₃ in the DCE,and the FDA as an additional crosslinking.All the polymer networks exhibited strong binding affinity for CO₂,and the highest uptake ability of 1.81 mmol g^-1 was obtained for PDMSTPA derived from1,1-dimethyl-2,3,4,5-tetraphenylsilole at 1.13 bar and 273 K.These polymers with high content of surface nitrogen are considered one of the most promising organic adsorbents for CO₂ capture.?2?Three hypercrosslinked polymer networks from carbazole-functionalized silole building blocks via Friedel-Crafts alkylation catalyzed by anhydrous FeCl₃ in the DCE and the FDA as an additional crosslinking.The PDMSCz has the highest specific surface area of 1137m²g^-1,and shows a higher carbon dioxide adsorption performance,up to 3.23mmolg^-1?1.13bar/273K?.Second It has a high thermal temperature.Research on the subject suggests that the monomers with the rigid carbazole units help to increase the carbon capture ability.?3?Three conjugated microporous polymers from carbazole-functionalized silole building blocks via oxidative coupling catalyzed by anhydrous FeCl₃.These polymers are amorphous and high thermal stability.Under the same conditions of?CO₂,CH₄?the adsorption significantly decreased,when the silicon atoms above all phenyl substituent.The results show that the adsorption properties of the prepared polymers can be affected by the introduction of different substituents.?4?Four conjugated microporous polymers based on 2,5-Diethynylsiloles has been synthesized via sonogashira-Hagiharai cross-coupling reaction.The specific surface area,micropore volume and gas adsorption properties of the prepared polymer were adjusted by selecting different structure monomers.The experimental results show that the polymers have high stability at high temperature,which is amorphous.