Heteroatom-rich porous organic polymers constructed by benzoxazine linkage with high carbon dioxide adsorption affinity

Porous organic polymers (POPs) incorporating macrocyclic units have been investigated in recent years in an effort to transfer macrocycles’ intrinsic host-guest properties onto the porous networks to achieve complex separations. In this regard, highly interesting building blocks are presented by the family of cyclotetrabenzoin macrocycles with rigid, well-defined, electron-deficient cavities. This macrocycle shows high affinity towards linear guest molecules such as carbon dioxide, thus offering an ideal building block for the synthesis of CO2-philic POPs. Herein, we report the synthesis of a porous organic polymer through the condensation reaction between cyclotetrabenzil with 1,2,4,5-tetraaminobenzene under ionothermal conditions using the eutectic zinc chloride/sodium chloride/potassium chloride salt mixture at 250 oC. Notably, following the condensation reaction, the macrocycle favors 3D growth rather than 2D one while retaining the cavity. The resulting polymer, named 3D-mPOP, showed a highly microporous structure with the BET surface area of 1142 m2 g−1 and a high carbon dioxide affinity with a binding enthalpy of 39 kJ mol−1. Moreover, 3D-mPOP showed very high selectivity for carbon dioxide in carbon dioxide/methane and carbon dioxide /nitrogen mixtures.

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Multi-hydroxyl-containing porous organic polymers based on phenol formaldehyde resin chemistry with high carbon dioxide capture capacity

RSC Advances ◽

10.1039/c5ra13405f ◽

2015 ◽

Vol 5 (87) ◽

pp. 71095-71101 ◽

Cited By ~ 16

Author(s):

Shi-Hui Jia ◽

Xuesong Ding ◽

Hai-Tao Yu ◽

Bao-Hang Han

Keyword(s):

Carbon Dioxide ◽

Phenol Formaldehyde ◽

Carbon Dioxide Capture ◽

Phenol Formaldehyde Resin ◽

Formaldehyde Resin ◽

Organic Polymers ◽

High Carbon ◽

Porous Organic Polymers ◽

High Carbon Dioxide ◽

Capture Capacity

Synthesis of multi-hydroxyl-containing porous organic polymers with considerable CO2 capture capability and CO2/N2 selectivity is reported.

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Synthesis of Novel Heteroatom-Doped Porous-Organic Polymers as Environmentally Efficient Media for Carbon Dioxide Storage

Applied Sciences ◽

10.3390/app9204314 ◽

2019 ◽

Vol 9 (20) ◽

pp. 4314 ◽

Cited By ~ 6

Author(s):

Satar ◽

Ahmed ◽

Yousif ◽

Ahmed ◽

Alotibi ◽

...

Keyword(s):

Carbon Dioxide ◽

Surface Area ◽

Carbon Dioxide Storage ◽

Co2 Uptake ◽

Area Network ◽

Organic Polymers ◽

High Carbon ◽

Porous Organic Polymers ◽

Carbon Dioxide Uptake ◽

High Carbon Dioxide

The high carbon dioxide emission levels due to the increased consumption of fossil fuels has led to various environmental problems. Efficient strategies for the capture and storage of greenhouse gases, such as carbon dioxide are crucial in reducing their concentrations in the environment. Considering this, herein, three novel heteroatom-doped porous-organic polymers (POPs) containing phosphate units were synthesized in high yields from the coupling reactions of phosphate esters and 1,4-diaminobenzene (three mole equivalents) in boiling ethanol using a simple, efficient, and general procedure. The structures and physicochemical properties of the synthesized POPs were established using various techniques. Field emission scanning electron microscopy (FESEM) images showed that the surface morphologies of the synthesized POPs were similar to coral reefs. They had grooved networks, long range periodic macropores, amorphous surfaces, and a high surface area (SBET = 82.71–213.54 m2/g). Most importantly, they had considerable carbon dioxide storage capacity, particularly at high pressure. The carbon dioxide uptake at 323 K and 40 bar for one of the POPs was as high as 1.42 mmol/g (6.00 wt %). The high carbon dioxide uptake capacities of these materials were primarily governed by their geometries. The POP containing a meta-phosphate unit leads to the highest CO2 uptake since such geometry provides a highly distorted and extended surface area network compared to other POPs.

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