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 of is 1050 m g and related dominant pore size is centered at 0.63 nm. The adsorption amount of methanol by is high up to 800 mg g (about 25.0 mmol g) at its saturated vapor pressure, which is higher than that of toluene (600 mg g, 6.5 mmol g). Further study indicates that polymer , 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.
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| http://dx.doi.org/10.1080/15685551.2016.1259831 | DOI Listing |
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