Hypercrosslinked porous polyporphyrin by metal-free protocol: characterization, uptake performance, and heterogeneous catalysis

Designed Monomers and Polymers
Li-Juan FengZhen-Tao Deng

Abstract

Through metal-free protocol, hypercrosslinked porous polyporphyrin with permanent porosity was obatined via the Friedel-Crafts alkylation of tetracarbazolylporphyrin using formaldehyde dimethyl acetal as an external cross-linker. Its chemical structure and porosity was well characterized and confirmed. The BET specific surface area value ofHCP-TCPPis 1050 m2 g-1and related dominant pore size is centered at 0.63 nm. The adsorption amount of methanol byHCP-TCPPis high up to 800 mg g-1(about 25.0 mmol g-1) at its saturated vapor pressure, which is higher than that of toluene (600 mg g-1, 6.5 mmol g-1). Further study indicates that polymerHCP-TCPP, possessing the high BET specific surface area and total pore volume, exhibits good hydrogen uptake of 3.44 wt % (77 K) and high carbon dioxide uptake of 41.1 wt % (298 K) at 18.0 bar. Besides, the obtained porous polymer can also be used as an effective heterogeneous catalyst for the Knoevenagel condensation between various aldehydes and malononitrile.

References

Jun 22, 2007·Journal of the American Chemical Society·Krista S Walton, Randall Q Snurr
Sep 2, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Jens WeberWinfried Böhlmann
Nov 17, 2011·Chemical Communications : Chem Comm·Arindam ModakAsim Bhaumik
Mar 30, 2012·Journal of the American Chemical Society·Qi ChenBao-Hang Han
May 19, 2012·Chemical Reviews·Dingcai WuKrzysztof Matyjaszewski
Oct 2, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Jekaterina Jeromenok, Jens Weber

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Methods Mentioned

BETA
NMR

Software Mentioned

NLDFT

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