Triptycene‐based Chiral Porous Polyimides for Enantioselective Membrane Separation

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 polyco...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2021-06, Vol.60 (23), p.12781-12785
Main Authors: Zhang, Qing‐Pu, Wang, Zhen, Zhang, Zhe‐Wen, Zhai, Tian‐Long, Chen, Jing‐Jing, Ma, Hui, Tan, Bien, Zhang, Chun
Format: Article
Language:English
Subjects:
chiral microporous polymers
enantioelective separation
Enantiomers
High-performance liquid chromatography
Liquid chromatography
Membrane separation
membranes
Monomers
Organic solvents
Polycondensation reactions
Polyimide resins
Selectivity
Separation
Surface stability
triptycene
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Summary: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. Chiral porous polyimides (FTPI) were synthesized using monomers of chiral 2,6‐diaminotriptycene. The absolute configurations were identified by single‐crystal X‐ray diffraction. The obtained R‐FTPI and S‐FTPI can be cast into robust, free‐standing films suitable for enantioselective separation with high permeation rates.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202102350