Structural design, preparation and characterization of light, isotropic and robust statically determined organic frameworks as reusable adsorbents

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

“…HBPBA-D and TBBPA-D were also tested for use in the adsorption of n-hexane and benzene vapors at 298 K/0.8 bar, with the results shown in Figure 4c,d. Compared to many other MOP materials under the same testing environment, such as conjugated microporous (120–272 mg g −1 , S BET = 309–1030 m 2 g −1 ) [38], PAN (200–210 mg g −1 , S BET = 925–1242 m 2 g −1 ) [39], PAF-S (262.96 mg g −1 , S BET = 1503 m 2 g −1 ) [40], and SOFs (159.2 mg g −1 , S BET = 332–1049 m 2 g −1 ) [22], HBPBA-D presented one of the highest adsorption capacities reported for benzene, 272.3 mg g −1 . In addition, both HBPBA-D and TBBPA-D frameworks showed higher adsorption benzene vapor adsorption capacities compared to that for the n-hexane vapor.…”

“…Chemicals including triethylamine (TEA), 1-methyl-2-pyrrolidinone (NMP), tetrahydrofuran (THF), dimethyl formamidine (DMF), chloroform, methanol, acetone, Pd(PPh 3 ) 4 , CuI, and 1,4-diethynylbenzene were purchased from commercial suppliers (Shanghai Macklin Biochemical Co., Ltd., Shanghai, China) and used without further purification. 3,3′,5,5′,7,7′-hexakis(4-bromophenyl)-1,1′-biadamantane (HBPBA) and 1,3,5,7-tetrakis(1,3-bibromophenyl) adamantane (TBBPA) were synthesized according to the reported procedures [22].…”

“…Adamantane-based SOF polymers demonstrated a residual weight of 60–70 wt % at 800 °C. Furthermore, the SOF polymers demonstrated good gas and toxic organic vapor adsorption capabilities: 5.2–15.1 wt % of CO 2 (273 K/1 bar), 1.0–2.4 wt % of CH 4 (273 K/1 bar), 279–407 mg g −1 of benzene, and 195–250 mg g −1 of n-hexane (298 K/0.8 bar) [22]. However, these adamantane-based MOPs were reported to be amorphous, having a wide pore size distribution, and relatively low surface area, which may limit their future applications in gas storage and toxic vapor uptakes.…”

“…According to the Marissen’s theory [25], macroscopic mechanical principles from structural engineering can be applied to the design of molecular rigid structures, such as, recently reported adamantane-based SOF polymers [22]. Herein, six/eight-arm bromophenyl adamantane-based “knot” and alkynes-type “rod” monomers were connected using a Sonogashira–Hagihara coupling reaction to generate two porous organic frameworks, HBPBA-D and TBBPA-D.…”

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.…”