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.