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Updated: Jul 2, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Flexible Porous Organic Polymers with α,β-Enone-Linkage via AlCl3-Catalyzed Horner-Wadsworth-Emmons Polymerization
Ze-Rui Meng1, Ze-Shuai Qi1, Boya Kuang1
1School of Materials Science and Engineering, Experimental Center for Advanced Materials, Beijing Institute of Technology, Beijing 100081, China.
None:
In this work, highly porous organic polymers with α,β-enone-linkage were synthesized via the Horner-Wadsworth-Emmons (H-W-E) polymerization in 10-20 g, and the catalytic amount of AlCl3 was found to increase the BET surface area of the as-prepared BIT-POP-120 and BIT-POP-121 dramatically (up to 716 m2 g-1), much higher than that of enone-liked porous organic polymers (POPs) reported. More importantly, this H-W-E polymerization of triphsophonate 4 with 2,5-hexanedione 6 provided a powerful way to offer 18% flexible moiety in BIT-POP-121 based on low-field NMR. Very high Pd/Pt selectivity of 3.54 and 28 was observed for BIT-POP-121 respectively, based on the adsorption capacity and Kd value using a binary solution of Pd2+ and Pt2+. This is very promising for the Pd recovery from the spent automotive catalytic converters in the future. The powerful strategy for making flexible POPs by H-W-E polymerization using easily available and stable aliphatic diketones will lead the development of high-performance flexible POPs for broad applications including recovery of precious metals in the near future.
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