Highly porous polysalicylates via Grignard reagent triggered “three-in-one” polyesterification and their high-loading nanocomposite membranes for gas separation
作者：Jinxin Zheng, Boya Kuang, Jing-Jing Yang, Jing Shi, Hanyuan Chen, Jin-Xiu Zhou*, Xiaohua Ma*, Mu-Hua Huang*
关键字：Porous Organic Polymers, Polysalicylates, Molecular Swithch
论文来源：期刊
具体来源：Journal of Membrane Science, 2025, 731, 124232
发表时间：2025年
Porous organic
polymers (POPs) with flexible linkers demonstrated some very unique
properties, although the challenge remains to get high surface area.
Herein, an efficient access to highly porous polysalicylates (named
Mg@BIT-POP-60 and Mg@BIT-POP-61) with benzylic (sp3 C) ester linkage was
developed by a powerful “threein-one” strategy aided by Grignard
reagent. That is, three events of (i) deprotonation of benzylic (sp3)
alcohol, (ii) activation of salicylate chemical switch for efficient
polyesterification by Grignard reagents, and (iii) monolith loading of
Mg2+ in the polymer happened simultaneously by only one simple
operation, which lead to flexible polysalicylates with high BET surface
area up to 549 m2 g?? 1. In addition, an easy processing technology
named premixing-hot pressing (pm-HoP) was developed to make the
nanocomposite membranes with high loadings of Mg@BIT-POP-61 (50 wt%) in
polycaprolactone (PCL). The reversed H2/CO2 selectivity of 3.12 favoring
H2
was observed comparing with pristine PCL (0.3), as well as high H2
permeability of 5805 Barrer. This is a promising strategy to develop
porous fillers-based nanocomposite membranes for overcoming trade-off
effect in gas separation technology.