Porous

Polyketones with a Well-Defined 1,3,5-Triphenyloylbenzene Subunit via

Cyclotrimerization of Enaminones for Gas Separations

ACS Appl. Polym. Mater. 2025, 7, 5616?5623.

Porous

organic polymers (POPs) functionalized with carbonyl groups have

attracted much attention not only due to the inherent properties of

polyketones but also for their rich postfunctionalizations. However, the

synthesis of porous polyketone is very limited, mainly through

AlCl3-mediated Friedel?Crafts acylation polymerization of aromatic

hydrocarbons, which faced issues such as undefined polyacylation

products, reactivity decreasing with polymerization going on, and the

residual AlCl3 in the polymers. In order to have a well-defined

structure of porous polyketones to advance the research of porous

materials, this Article developed cyclotrimerization polymerization of

tris-enaminones to access a class of porous polyketones based on

1,3,5-triphenylacetylbenzene structural units named BIT-POP-80 ～

BIT-POP-82, with a BET surface area up to 580 m2 g?1. Considering the

affinity of the carbonyl group to CO2, the as-synthesized porous

polyketones were doped into the polysulfone matrix as a porous filler to

make mixed matrix membranes (MMMs). It is found that the MMMs

effectively improved the permeability of CO2 by 150% as well as the gas

pair selectivity of CO2/CH4. The cyclotrimerization polymerization of

enaminones reported in this paper provided a powerful approach to

functionalized porous polymer materials with well-defined structure.