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.