Premium
Homochiral MOF–Polymer Mixed Matrix Membranes for Efficient Separation of Chiral Molecules
Author(s) -
Lu Yizhihao,
Zhang Huacheng,
Chan Jun Yong,
Ou Ranwen,
Zhu Haijin,
Forsyth Maria,
Marijanovic Emilia M.,
Doherty Cara M.,
Marriott Philip J.,
Holl Mark M. Banaszak,
Wang Huanting
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201910408
Subject(s) - membrane , metal organic framework , enantiomer , polymer , homochirality , racemic mixture , chirality (physics) , chiral resolution , materials science , chemical engineering , molecule , chemistry , nanocrystal , crystallization , combinatorial chemistry , organic chemistry , nanotechnology , adsorption , chiral symmetry , biochemistry , physics , quantum mechanics , nambu–jona lasinio model , engineering , quark
Homochiral metal–organic framework (MOF) membranes have been recently reported for chiral separations. However, only a few high‐quality homochiral polycrystalline MOF membranes have been fabricated due to the difficulty in crystallization of a chiral MOF layer without defects on porous substrates. Alternatively, mixed matrix membranes (MMMs), which combine potential advantages of MOFs and polymers, have been widely demonstrated for gas separation and water purification. Here we report novel homochiral MOF–polymer MMMs for efficient chiral separation. Homochirality was successfully incorporated into achiral MIL‐53‐NH 2 nanocrystals by post‐synthetic modification with amino acids, such as l ‐histidine ( l ‐His) and l ‐glutamic acid ( l ‐Glu). The MIL‐53‐NH‐ l ‐His and MIL‐53‐NH‐ l ‐Glu nanocrystals were then embedded into polyethersulfone (PES) matrix to form homochiral MMMs, which exhibited excellent enantioselectivity for racemic 1‐phenylethanol with the highest enantiomeric excess value up to 100 %. This work, as an example, demonstrates the feasibility of fabricating diverse large‐scale homochiral MOF‐based MMMs for chiral separation.