Bifunctional Porous Organic Polymers Based on Postfunctionalization of the Ketone-Based Polymers

Abstract

Multifunctional porous organic polymers (POPs) are excellent porous materials for CO2 capture and Hg2+ adsorption. Especially, plentiful ultramicropores (d < 0.7 nm) and a high nitrogen (N) content are beneficial for CO2 capture, and the micropores and the specific functional groups are helpful for Hg2+ adsorption, while the facile construction of the multifunctional POPs still remains a challenge. Herein, a series of bifunctional POPs was simply fabricated from the ketone-based polymers on the basis of the postfunctionalization. Because of their low Brunauer–Emmett–Teller (BET) surface area (S BET) and pore volume (V total), the polymers were further carried out the Schiff-based reaction using melamine (MA) as the postmodifier. As the rigid external cross-linker, MA embedded in the pores of the polymers and supported the skeleton of the polymers. The resulting polymers showed a sharp increase of the S BET (up to 703 m2/g) and V total (up to 0.657 cm3/g), high N content (up to 36.95 wt %), and three-dimensional hierarchical porosity. In particular, the high ultramicropore volume (up to 0.199 cm3/g) of the resulting polymers made them effective for CO2 capture (193 mg/g; 273 K and 1 bar). The high micropore volume (up to 0.272 cm3/g) and abundant N (up to 36.95 wt %) offered them high Hg2+ capacity (425 mg/g at 298 K). This facile postfunctionalization strategy is potentially useful for the fabrication of some other multifunctional POPs.

Two novel nitrogen-rich metal–organic nanotubes: syntheses, structures and selective adsorption toward rare earth ions

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Novel Carbazole-Based Porous Organic Polymer for Efficient Iodine Capture and Rhodamine B Adsorption

“…As a branch of porous materials, porous organic polymers (POPs) have developed rapidly in the adsorption direction for the past few years. Compared with other common porous materials, POPs have the characteristics of high specific surface area, good stability, , and easy structure regulation and functionalization, , which can greatly improve the adsorption capacity and removal rate. In addition, high affinity binding sites − can be embedded in the skeleton when designing POPs according to the target, such as introducing a large number of heteroatoms (F, S, N, etc.…”

Furan- and Thiophene-Modified Hyper-Crosslinked Polymers and Their Adsorption of Phenol from Aqueous Solution

“…Hyper-crosslinked polymers (HCPs) are a kind of typical porous material initially reported by Davankov and co-workers in 1970s, and they have attracted increasing interest in recent years. , More recently, HCPs have achieved rapid development because of their diverse synthesis strategies, easy functionalization, high Brunauer–Emmett–Teller (BET) surface area ( S BET ), adjustable porosity, and diversified surface chemistry, , and they have been diffusely used in fields such as volatile organic compound adsorption, − gas capture and separation, − catalysis, ,, energy storage, and drug release …”