The paper titled Highly
porous polysalicylates via Grignard reagent triggered
“three-in-one”polyesterification and their high-loading nanocomposite
membranes for gas separation has been published.
Journal of Membrane Science, 2025, 731, 124232.
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.