Synthesis of thermochemically stable tetraphenyladamantane-based microporous polymers as gas storage materials

Abstract

In view of environmental pollution control and purification of natural gases, developing ideal porous materials for small gas molecule (hydrogen, methane and carbon dioxide) capture is an important, pressing challenge.

Larger pore volume tetraphenyladamantane‐based hybrid porous polymers: Facile Friedel–Crafts preparation, CO2 capture, and Rhodamine B removal properties

“…The CO 2 adsorption capacity of HPP‐1 was 2.0 mmol g −1 (8.82 wt %), at 273 K, 1.0 bar. The value was comparable to other TPA‐based polymers NOP‐55 (8.6 wt %, 1 bar, 273 K), MOP‐Ad‐2 (7.5 wt %, 1.13 bar, 273 K) and was even superior to most triazine‐based porous polymers PAF‐16 (8.3 wt%) and POSS‐based porous polymer . The isosteric heats ( Q st ) could exhibit the affinity between the polymer pore walls and gaseous adsorbates.…”

“…The broad peak centered at 140.3 ppm was assigned to the unreacted vinyl carbons (CH 2 CHSi) and the substituted aromatic carbons derived from the units of PhCH 2 CH 2 Si as well as PhCH(CH 3 )Si . The pronounced two peaks at 38.9 and 48.6 ppm were attributed to the methylene and quaternary bridgehead carbons from adamantane, respectively . The broad peaks centered at 22.7, 17.5, and 13.4 ppm were attributed to the methylene carbons (PhCH 2 CH 2 Si and PhCH 2 CH 2 Si) and the methine carbons [PhCH(CH 3 )Si], indicating that the vinyl units had combined phenyl groups and formatted the single CC bonds during the synthesis .…”

Polycarbonate/Sulfonamide Composites with Ultralow Contents of Halogen-Free Flame Retardant and Desirable Compatibility

“…As shown in Figure 1 a, the stretching vibrations of = C–H and C = C in benzene rings appeared at 3072, 1596 and 1494 cm −1 , respectively. Peaks at 833 cm −1 , and 2928 cm −1 and 2854 cm −1 were ascribed to the characteristic absorption peak of para-disubstituted benzene, and −CH 2 of adamantine, respectively [ 33 ]. Peaks at 1334 cm −1 and 1163 cm −1 were assigned to the stretching vibrations of S=O from the sulfamide group [ 34 ]; and peaks at 3362 cm −1 and 3258 cm −1 corresponded to the stretching vibration of N-H [ 35 ], which also had a deformation vibration peak at 708 cm −1 .…”

Microporous frameworks with conjugated π-electron skeletons for enhanced gas and organic vapor capture

“…These values surpass most microporous organic materials with comparable or even ultrahigh surface area, such as COF-103 ( . 25 Additionally, in our previous works, we reported two series of microporous organic polymers, MOP-Ads 15 and HBPBAs, 16 which exhibited similar BET surface areas but lower gas uptake capacity. This superior performance could be attributed to the narrower pore-size distribution of these CMF-Ad frameworks herein, as well as the π-conjugated skeleton.…”

“…line with previously reported microporous frameworks based on adamantane. 15,18 The broad features in the powder X-ray diffraction (XRD) patterns (ESI, Fig. S6) imply that these frameworks are non-ordered and more amorphous in nature.…”