Facile synthesis of cost-effective porous aromatic materials with enhanced carbon dioxide uptake

Abstract

Porous aromatic frameworks (PAF-32s) derived from tetrahedral monomers as basic building units are successfully synthesized via Friedel-Crafts alkylation reaction in the present of inexpensive catalyst FeCl 3. The resulted PAF-32 materials possess high stabilities and high surface areas up to 1679 m 2 g-1. In particular, amino and hydroxyl functional groups are introduced in the networks. The corresponding functionalized PAF materials (PAF-32-NH 2 and PAF-32-OH) display enhanced CO 2 adsorption capacities and higher heat of adsorption (Q st) than the non-functionalized PAF-32.

Efficient CO 2 capture by triptycene-based microporous organic polymer with functionalized modification

“…The multi-amino groups and high micropore content in TPP-1-NH 2 should be the decisive factors for its high CO 2 uptake. To the best our knowledge, the CO 2 uptake of TPP-1-NH 2 is higher than those reported functionalized CMPs (1.6e1.8 mmol g À1 ) [19], PAF-32 (1.66e2.17 mmol g À1 ) [29], and other hyper-crosslinked polymers (1.11e3.07 mmol g À1 ) [30,37].…”

“…To enhance the affinity between adsorbents surface and CO 2 molecules, functional groups, named as task-specific CO 2 -philic moieties, have recently been incorporated into the porous polymers via "knitting" method [29,30]. Particularly, after the modification with sulfonic acid, lithium sulfonate or polyamine, the porous polymer network-6 (PPN-6) with an ultrahigh-surface-area presented an impressive CO 2 adsorption capacity as well as high CO 2 /N 2 selectivity [23,31].…”

Triazine containing N-rich microporous organic polymers for CO 2 capture and unprecedented CO 2 /N 2 selectivity

“…The CO2 philicity of the polymeric network has tremendously increased from previously reported modified polycarbazole and polytriphenylamine. CO2 uptakes of these two materials are also very comparable with previously best reported COFs [38,39], MOFs [40,41], N-doped microporous carbons [42,43], hypercrosslinked porous polymers [44][45][46] , etc. The high density of basic nitrogen sites of triazine present in the polymer network which interact with ewis acidic CO2 molecules via dipole quadrapole interaction, are responsible for huge CO2 uptake [47].…”

Microporous Hyper-Cross-Linked Aromatic Polymers Designed for Methane and Carbon Dioxide Adsorption

“…A series of porous organic materials were prepared by polymerization of tetraphenyl methane (TPM) by means of Friedel-Crafts reaction (employing formaldehyde dimethylacetal as electrophile and FeCl3 as catalyst) modifying a reported procedure ( Figure 2) 34,38 . Since Friedel-Crafts alkylation is unselective under the conditions employed, substitution on the aromatic rings cannot be easily controlled.…”