Triptycene‐based Chiral Porous Polyimides for Enantioselective Membrane Separation
Qing‐Pu Zhang, Zhen Wang, Zhe‐Wen Zhang, Tian‐Long Zhai, Jingjing Chen, Hui Ma, Bien Tan, Chun Zhang
Abstract
Enantiomers of 2, 6-diaminotriptycene (R, R-1 and S, S-1) are split by chiral-phase HPLC and their absolute configurations are identified by single-crystal X-ray diffraction technology. Using the enantiomers as monomers, a couple of chiral porous polyimides (R-FTPI and S-FTPI) are prepared by polycondensation reactions and display good heat stability, high BET surface area and good solubility in organic solvents. Moreover, both of R-FTPI and S-FTPI can be cast into robust, free-standing films suitable for enantioselective separation with symmetrical chiral selectivity.
Topics & Concepts
Enantioselective synthesisEnantiomerSelectivityMembraneTriptyceneSolubilityMonomerMaterials sciencePolyimideChemical engineeringPorosityCondensation polymerPhase (matter)Thermal stabilityEnantiomeric excessChemistryOrganic chemistryPolymer chemistryCatalysisPolymerEngineeringLayer (electronics)BiochemistryCovalent Organic Framework ApplicationsMetal-Organic Frameworks: Synthesis and ApplicationsMembrane Separation and Gas Transport