Constructing POSS and viologen-linked porous cationic frameworks induced by the Zincke reaction for efficient CO₂ capture and conversion

Abstract

POSS and viologen-linked porous cationic frameworks (V-PCIF-X, X = Cl, Br) are constructed via the Zincke reaction between octa(aminophenyl)silsesquioxane and viologen linkers. The typical V-PCIF-Br has a high surface area with abundant ionic sites, micro-/mesopores and Si-OH groups, serving as an efficient porous adsorbent and metal-free catalyst for simultaneous CO2 capture and conversion.

Quaternization-induced catalyst-free synthesis of viologen-linked ionic polyacetylenes towards heterogeneous catalytic CO2fixation

“…18,19 Among them, viologen-based ionic polymers (VIPs) have been regarded as one type of promising functional material for heterogeneous catalysis by virtue of their adjustable viologen redox states and ionic active sites. [20][21][22][23] In the aspect of synthesis, a great variety of VIPs have been constructed by different strategies including the Heck reaction, 23 Sonogashira coupling reaction, 15,24 trimerization, 25 polycondensation, 26,27 Zincke reaction 22,28,29 and quaternization reaction (also called the Menshutkin reaction). [30][31][32][33][34][35][36] However, most of these synthetic strategies still suffer from some drawbacks, such as the use of expensive catalysts or toxic additives, complicated synthetic processes, and relatively low contents of viologens within the polymers.…”

“…Among them, only the Zincke reaction and quaternization reaction can achieve catalyst-free synthesis of VIPs. 22,[28][29][30][31][32][33][34][35] However, the Zincke reaction strategy highly depends on the use of high-cost multi-aniline-based building blocks and multi-nitrobenzene-based viologen Zincke salts. 22,28,29 And also, this reaction is not an atom economic reaction, and inevitably releases the undesired by-product 2,4-dinitroaniline during the reaction.…”

“…22,[28][29][30][31][32][33][34][35] However, the Zincke reaction strategy highly depends on the use of high-cost multi-aniline-based building blocks and multi-nitrobenzene-based viologen Zincke salts. 22,28,29 And also, this reaction is not an atom economic reaction, and inevitably releases the undesired by-product 2,4-dinitroaniline during the reaction. 28,35 By contrast, the quaternization reaction can provide a facile, catalyst-free and atom economic route to prepare VIPs by the one-pot reaction between 4,4 0 -bipyridine and multi-bromobenzyl monomers such as 1,3,5-tris(bromomethyl)benzene and its analogues.…”

The Preparation and Chemical Structure Analysis of Novel POSS-Based Porous Materials

“…They further reported a series of hybrid nanoporous Polystyrene (PS)-POSS based materials via the Friedel-Crafts reaction [26]. Moreover, POSS porous materials viologen-linked porous cationic frameworks induced by the Zincke reaction for efficient CO 2 capture and conversion [27].…”

Azine Steric Hindrances Switch Halogen Bonding to N‐Arylation upon Interplay with σ‐Hole Donating Haloarenenitriles

“…[61][62][63] Only a few cases of conventional S N Ar reactions, where EWG groups activate the Xbound ipso-carbon toward the nucleophilic attack have been reported. These reactions include 2,4-dinitrobromobenzene, [64,65] 2,4-dinitroiodobenzene, [66] 2,4,6-trinitroiodobenzene, [67] tetrabromocatechol, [68][69][70] bromopyromellitic diimide, [71] and 2,3dibromonaphthalene-1,4,5,8-tetracarboxylic acid bisimide [72,73] as the arylation agents. All these reactions were conducted at high to moderate temperatures depending on the activating effect of substituents.…”