Microporous organic polymers based on hexaphenylbiadamantane: Synthesis, ultra-high stability and gas capture

Abstract

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Adamantane-Based Micro- and Ultra-Microporous Frameworks for Efficient Small Gas and Toxic Organic Vapor Adsorption

“…The CH 4 uptake capacities of the two frameworks at 273 K/1 bar were also studied, and the results presented in Figure 4b. The CH 4 uptake capacities of HBPBA-D and TBBPA-D (1.63 and 1.43 wt %, respectively) are again higher than that of many reported porous polymers at 273 K/1 bar, such as POP (1.04–1.45 wt %, S BET = 791–983 m 2 g −1 ) [32], adamantane-based NOPs (0.78–1.32 wt %, S BET = 526–1178 m 2 g −1 ) [27] and HBPBAs-Ad (1.4–1.8 wt %, S BET = 742–891 m 2 g −1 ) [21], PPF (1–1.32 wt %, S BET = 1740 m 2 g −1 ) [33] and PCN (0.91–1.66 wt %, S BET = 393–721 m 2 g −1 ) [34]. According to Henry’s law, the CO 2 /CH 4 selectivity of HBPBA-D and TBBPA-D at 273 K and pressure of less than 0.18 bar was calculated to be 4.1 and 4.6, respectively (Figure 4e,f), which is superior to many other polymers under the same testing conditions, such as CP-CMPs (3.4–4.2 at 273 K) [35], TEPS-TPA (3.9 at 273 K) [36] and triphenylamine-containing MOPs (3.4–4.3 at 273 K) [37].…”

“…For instance, Chang et al [18,19] synthesized a clickable microporous polymer based on 1,3,5,7-tetrakis(4-iodopheny)adamantane with high surface area (442–665 m 2 g −1 ) and good thermo-stability (340 °C) and a series of post-functionalized polymers with adamantane core, which showed good CO 2 uptake capacities (880–1890 m 2 g −1 , 27–39 cm 3 g −1 at 298 K/1 bar). MOPs-Ad [20] and HBPBAs-Ad [21] constructed from tetrakis(4-bromophenyl)admantane and hexaphenylbiadamantane, showed high thermal (stable up to >500 °C) and chemical (strong acid and base) stability. Adamantane-based SOF polymers demonstrated a residual weight of 60–70 wt % at 800 °C.…”

Microporous frameworks based on adamantane building blocks: Synthesis, porosity, selective adsorption and functional application

“…4,4'-diethynyl biphenyl (DPE) was synthesized a ccording to the published method except tha t 2-methyl-3-butyn-2-ol was used ins tead of tri methylsil ylacetylene [6]. 3,3',5,5',7,7'-Hexa kis(4-bromophenyl)-1,1'-biadamantane (HBPBA) was s ynthesized a ccordi ng to published methods [19]. The PDMS (Sylga rd 184) was obtained from Dow Corning Co., Ltd. (China).…”

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

“…The objectives of this work are three-folds: firstly, we aimed to design and produce a new halogen-free flame retardant used for effectively improving the flame retardancy performance of PC, and the improvement can be achieved just with a tiny amount of FR addition; secondly, improved mechanical properties of the resulting PC composite with the same FR incorporation are also expected; thirdly, good FR dispersion in PC matrix without agglomeration and thus desirable compatibility between PC and FR would be accomplished. To this end, a sulfur and nitrogen based FR, 1,3,5,7-tetrakis (phenyl-4-sulfonamide) adamantane (FRSN) centered on adamantane (owing to its ultrahigh physicochemical stability [ 27 , 28 ]) was synthesized. Hydrogen bonds potentially formed between PC and FRSN contribute to improving their interfacial bonding and compatibility.…”