Hybrid porous polymers constructed from octavinylsilsesquioxane and benzene via Friedel–Crafts reaction: tunable porosity, gas sorption, and postfunctionalization

Abstract

Based on the multi-reaction sites of benzene in the Friedel–Crafts reaction with octavinylsilsesquioxane, hybrid polymers with tunable porosity were prepared.

Construction of Hybrid Porous Materials from Cubic Octavinylsilsesquioxane through Friedel–Crafts Reaction Using Tetraphenylsilane as a Concentrative Crosslinker

“…Compared with Heck reactions, Friedel-Crafts reactions require relatively mild conditions and low-cost catalysts, but still achieve high efficiency. [30,31] Although many porous materials have been prepared through the application of Friedel-Crafts reactions, [14,32] this remains a relatively unexplored area. TPS, as a rigid silicon-centered monomer, is not commonly used to prepare porous materials.…”

“…Benzene was chosen in one report as a planar molecule to react with cubic OVS to produce porous hybrid polymers with an S BET of up to 904 m 2 g -1 through the Friedel-Crafts reaction; however, the pore-size distribution of the product was wide and irregular. [32] Clearly, modern applications require materials with regular and narrow pore-size distribution in addition to high surface areas. As a rigid tetrahedral building block, TPS would play different roles compared with benzene in the preparation of hybrid networks.…”

An Efficient Approach to Octabromophenylethyl‐Functionalized Cage Silsesquioxane and Its Use in Constructing Hybrid Porous Materials

“…The adsorption capacity of CO 2 is also comparable to that of some metal-organic framework materials and SQ-based porous materials at the same measured pressure. [50,14,51] Therefore, porous cage polymer 1 is Figure 10. CO 2 adsorption isotherm of cage polymer 1 at 273 K and 101 kPa.…”

High Surface Area, Thermally Stable, Hydrophobic, Microporous, Rigid Gels Generated at Ambient from MeSi(OEt)3/(EtO)3SiCH2CH2Si(OEt)3 Mixtures by F−‐Catalyzed Hydrolysis

“…Gel materials offer SSA'so fu pt o1 300 m 2 g À1 some of the highest known systemsb ased on SQs. [15][16][17][18][19][20][21][22][23][24] Gel materials also offer solvent uptake up to 600 %b ymass. Vinyl groups can be incorporated into the systemso ffering post polymerization functionalization points and further crosslink density,e xtending the useful possibilities for these materials.…”

“…Many highs urface area organic materialss uch as hyper-cross-linked styrene-divinylbenzene copolymers are made by the porogen methodw ith surface areas approaching 2000 m 2 g À1 .S ilsesquioxaneb ased materials fit into the second synthetic methodology,w hereby porosity introduction employs the monomer geometry coupled with controlled polymerization. [13][14][15][16][17][18][19][20][21] Most high surfacea rea materials containing silicon are made via sol-gelp rocessing of tri-and tetraalkoxysilanes. [22][23][24][25] Solgel processing employs acid-or base-catalyzed hydrolysis and condensation to form highly cross-linkedx ero-or aerogels depending on the drying method.…”