A novel triptycene-based dianhyride as a shape-persistent building block with high internal free volume was conveniently synthesized via solvothermal method.Subsequently,three all-aromatic polyimides,Pla,PIb and PIc,w...A novel triptycene-based dianhyride as a shape-persistent building block with high internal free volume was conveniently synthesized via solvothermal method.Subsequently,three all-aromatic polyimides,Pla,PIb and PIc,were prepared by a one-step polycondensation of triptycene-2,3,6,7-tetracarboxylic dianhydride with 2,2＇-bis（trifluoromethyl）benzidine,m-tolidine and 3,3＇,5,5＇-tetramethylbenzidine,respectively.The corresponding polymers exhibit good solubility,excellent thermal stability,significant microporosity with large BET surface areas of up to 623 m^-2 g^-1 as well as an unexpected optical property with a transmittance of -85%at 450 nm as -20μm membranes.展开更多
A series of microporous polyimide networks with porphyrin units （Pr-MPIs） were facilely synthesized through a one-step solution polymerization process. Of particular interest is that Pr-MPI-1 containing distorted sp...A series of microporous polyimide networks with porphyrin units （Pr-MPIs） were facilely synthesized through a one-step solution polymerization process. Of particular interest is that Pr-MPI-1 containing distorted spirobisindane unit revealed the highest BET surface area （953 m^2/g）, total pore volume （0.75 cma/g）, and extreme hysteresis between the N2 adsorption and desorption isotherm. Further study revealed the prepared Pr-MPI-1 exhibited a synergistic structural effect on exceptional uptake of volatile organic compounds （VOCs） due to the high porosity and highly distorted spirobisindane structure enabled large interface and the swellability. This new approach would open up a facile approach toward the preparation of highly swellable high performance polymeric microporous materials, which are deeply wanted for environment-related applications such as VOCs adsorption and oil/water separation.展开更多
基金the National Natural Science Foundation of China(No.51473055)for financial support
文摘A novel triptycene-based dianhyride as a shape-persistent building block with high internal free volume was conveniently synthesized via solvothermal method.Subsequently,three all-aromatic polyimides,Pla,PIb and PIc,were prepared by a one-step polycondensation of triptycene-2,3,6,7-tetracarboxylic dianhydride with 2,2＇-bis（trifluoromethyl）benzidine,m-tolidine and 3,3＇,5,5＇-tetramethylbenzidine,respectively.The corresponding polymers exhibit good solubility,excellent thermal stability,significant microporosity with large BET surface areas of up to 623 m^-2 g^-1 as well as an unexpected optical property with a transmittance of -85%at 450 nm as -20μm membranes.
基金financially supported by the National Natural Science Foundation of China(Nos.20974069 and 21174089)the State Key Laboratory of Molecular Engineering of Polymers(Fudan University)(No.K2013-23)
文摘A series of microporous polyimide networks with porphyrin units （Pr-MPIs） were facilely synthesized through a one-step solution polymerization process. Of particular interest is that Pr-MPI-1 containing distorted spirobisindane unit revealed the highest BET surface area （953 m^2/g）, total pore volume （0.75 cma/g）, and extreme hysteresis between the N2 adsorption and desorption isotherm. Further study revealed the prepared Pr-MPI-1 exhibited a synergistic structural effect on exceptional uptake of volatile organic compounds （VOCs） due to the high porosity and highly distorted spirobisindane structure enabled large interface and the swellability. This new approach would open up a facile approach toward the preparation of highly swellable high performance polymeric microporous materials, which are deeply wanted for environment-related applications such as VOCs adsorption and oil/water separation.
