Constructing hybrid porous polymers from cubic octavinylsilsequioxane and planar halogenated benzene

Wang, Dengxu; Yang, Wenyan; Feng, Shengyu; Liu, Hongzhi

doi:10.1039/c3py01688a

Cited by 46 publications

(49 citation statements)

References 50 publications

(111 reference statements)

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“…The broad diffraction peaks at around 22° 2 θ are associated with the Si−O−Si linkages (see Figure S5 in the Supporting Information). These results are consistent with those of other reported POSS‐based nanoporous materials …”

Section: Resultssupporting

confidence: 93%

“…For HPP‐1 a and HPP‐2 a , the signals derived from the ethenylene carbon atoms are observed at around 120 and 149 ppm (Si C H=CH and SiCH= C H), which confirms the formation of internal double bonds following the reactions between the vinyl and brominated aromatic groups. This finding is consistent with previous studies . For HPP‐1 a , the peaks observed at 120.5, 129.9, 138.3, and 149.4 ppm can be assigned to sp 2 phenylene carbon atoms in the spirobifluorene unit.…”

Section: Resultssupporting

confidence: 93%

“…HPP‐2 a shows a similar 29 Si NMR spectrum. The destruction observed in these polymers can be explained by the distortion of cubic POSS cages linked through rigid connections to form cross‐linking networks and the introduction of base as acid adsorbent …”

Section: Resultsmentioning

confidence: 99%

“…These findings reveal that the porosity can be tuned by altering the reaction conditions, and the different trends in porosity shown by these two series of polymers suggest that the selection of building units is also an important factor influencing the porosity when using the same conditions. Previously, many researchers have focused on tuning the porosity by diverse means, mainly by selecting monomer species and reaction conditions . Although some success has been found, it is still a challenge to control porosity by merely adjusting one factor.…”

Section: Resultsmentioning

confidence: 99%

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Fluorescence‐Tuned Polyhedral Oligomeric Silsesquioxane‐Based Porous Polymers

Wang

Feng

Liu

2016

Chemistry A European J

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Two series of new polyhedral oligomeric silsesquioxane (POSS)-based fluorescent hybrid porous polymers, HPP-1 and HPP-2, have been prepared by the Heck reaction of octavinylsilsesquioxane with 2,2',7,7'-tetrabromo-9,9'-spirobifluorene and 1,3,6,8-tetrabromopyrene, respectively. Three sets of reaction conditions were employed to assess their effect on fluorescence. These materials exhibit tunable fluorescence from nearly no fluorescence to bright fluorescence both in the solid state and dispersed in ethanol under UV light irradiation by simply altering the reaction conditions. We speculated that the difference may be attributable to the fluorescence quenching induced by Et3 N, P(o-CH3 Ph)3 , and their hydrogen bromide salts employed in the reactions. This finding could give valuable suggestions for the construction of porous polymers with tunable/controllable fluorescence, especially those prepared by Heck and Sonogashira reactions in which these quenchers are used as organic bases or co-catalysts. In addition, the porosities can also be tuned, but different trends in porosity have been found in these two series of polymers, which suggests that various factors should be carefully considered in the preparation of porous polymers with tunable/controllable porosity. Furthermore, HPP-1 c showed moderate CO2 uptake and fluorescence that was efficiently quenched by nitroaromatic explosives, thereby indicating that these materials could be utilized as solid absorbents for the capture and storage of CO2 and as sensing agents for the detection of explosives.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Fluorescence‐Tuned Polyhedral Oligomeric Silsesquioxane‐Based Porous Polymers

Wang

Feng

Liu

2016

Chemistry A European J

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“…Silica nanoparticles have exhibited a good thermal, chemical stability with well-dened, size-tunable structure. 34,35 Rigid cage make POSS become an ideal building block to construct novel inorganic-organic hybrid porous materials. [23][24][25] As a silica-like cage compound, polyhedral oligomeric silsesquioxane (POSS) provides an excellent platform for synthesis of new inorganicorganic hybrid materials with enhanced thermal and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Hybrid nanoporous polystyrene derived from cubic octavinylsilsesquioxane and commercial polystyrene via the Friedel–Crafts reaction

Yang

et al. 2015

RSC Adv.

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A series of hybrid nanoporous polystyrenes were synthesized from commercial polystyrene (PS) and cubic octavinylsilsesquioxane (OVS) via the Friedel-Crafts reaction. The porosity of the resulting hybrid polymers could be fine-tuned by varying the ratio of PS and OVS. The resulting polymers, HCP-1 to HCP-9 had apparent Brunauer-Emmett-Teller surface areas (S BET ) in a range of 2.6 to 767 m 2 g À1 , with total pore volumes in the range of 0.36 to 0.90 cm 3 g À1 . The S BET was maximum when OVS loading was 9.1 wt%; it then decreased to almost no porosity before increasing again with the increase of OVS loading. The thermal decomposition temperatures of the hybrid polymers were close to pure PS under a N 2 atmosphere, but the residues increased with the increase of OVS loading. The gas sorption applications revealed that HCP-3 possessed H 2 uptake of 3.01 mmol g À1 (0.60 wt%) at 77 K and 1.01 bar and CO 2 uptake of 1.12 mmol g À1 (4.93 wt%) at 298 K and 1.01 bar. † We dedicate this paper to Prof. Hongzhi Liu's mother, who is dearly missed by all members of the family.‡ Electronic supplementary information (ESI) available: The elemental analysis results of HCP-1 to HCP-9; FT-IR spectra of HCP-1, HCP-2, HCP-5 to HCP-7; FE-SEM images of HCP-3 to HCP-9 with different magnications and areas. See

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A triptycene derived hypercrosslinked polymer for gas capture and separation applications

Ansari

Bera

Das

2021

J of Applied Polymer Sci

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This work describes facile synthesis of a porous polymeric material (T‐HCP) using readily available reagents. Specifically, T‐HCP is a thermally stable and hypercrosslinked polymer (HCP) that is essentially microporous with a high BET specific surface area (940 m2 g−1). Triptycene based polymers are known to feature internal free volume. Thus, the incorporation of triptycene units and extensive crosslinking by an external cross‐linker in T‐HCP makes it a promising adsorbent for small gas capture applications. Experimental results show that T‐HCP demonstrated good CO2 capture capacity of 132 mg g−1 (273 K, 1 bar). Molecular hydrogen storage capacity of T‐HCP is estimated to be 17.7 mg g−1 (77 K, 1 bar). T‐HCP revealed high CO2/N2 selectivity (up to 63) as well as promising CO2/CH4 (up to 9.1) selectivity suggesting its potential applicability for CO2 separation from flue and natural gases.

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Constructing hybrid porous polymers from cubic octavinylsilsequioxane and planar halogenated benzene

Abstract: Hybrid porous polymers derived from cubic octavinylsilsequioxane and planar halogenated benzene monomers exhibit high thermal stability, tunable porosities and potential applications in carbon dioxide storage.

Cited by 46 publications

References 50 publications

Fluorescence‐Tuned Polyhedral Oligomeric Silsesquioxane‐Based Porous Polymers

Fluorescence‐Tuned Polyhedral Oligomeric Silsesquioxane‐Based Porous Polymers

Hybrid nanoporous polystyrene derived from cubic octavinylsilsesquioxane and commercial polystyrene via the Friedel–Crafts reaction

A triptycene derived hypercrosslinked polymer for gas capture and separation applications

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