A Knitting Copolymerization Strategy to Build Porous Polytriazolium Salts for Removal of Anionic Dyes and MnO₄⁻

Abstract

Although considerable efforts have been devoted to novel ionic porous networks (IPNs), the development of them in a scalable manner to tackle the issues in pollutant treatment by adsorption remains an imminent challenge. Herein, inspired by natural spider webs, a knitting copolymerization strategy is proposed to construct analogue triazolium salt‐based porous networks (IPN‐CSUs). It is not only convenient to incorporate the cationic motifs into the network, but easy to control over the contents of ionic pairs. The as‐prepared IPN‐CSUs displays a high surface area of 924 m2 g−1, a large pore volume of 1.27 cm3 g−1 and abundant ionic sites, thereby exhibiting fast adsorption rate and high adsorption capacity towards organic and inorganic pollutants. The kinetics and thermodynamics study reveal that the adsorption followed a pseudo‐second‐order kinetic model and Langmuir isotherm model correspondingly. Specifically, the maximum adsorption capacity of the IPN‐CSUs is as high as 1.82 mg mg−1 for permanganate ions and up to 0.54 mg mg−1 for methyl orange, which stands out among the previously reported porous adsorbents so far. It is expected that the strategy reported herein can be extended to the development of other potential efficient adsorbents in water purifications.

Viologen-Based Cationic Radical Porous Organic Polymers for Visible-Light-Driven Photocatalytic Oxidation

“…In recent years, the photocatalytic oxidative coupling of amines to imines as valuable intermediates for organic and pharmaceutical synthesis has received much attention, which were achieved by many metal-free functional porous organic polymer photocatalysts. − By virtue of the significantly different photoelectric properties of VCR-POP-1, VIL-CN, and V-POP-1, their photocatalytic performances were evaluated in the visible-light-driven selective oxidative coupling of a typical substrate benzylamine to imine in atmospheric air (see Figure and Table S4). First, the viologen cationic radical polymer VCR-POP-1 afforded a high conversion of 97% and a high selectivity of 99% for the product imine in the solvent CH 3 CN under the irradiation of white LED lamps (5 W) at room temperature for 12 h (Figures and S12).…”

Combining Polymerization and Templating toward Hyper-Cross-Linked Poly(propargyl aldehyde)s and Poly(propargyl alcohol)s for Reversible H2O and CO2 Capture and Construction of Porous Chiral Networks

“…On the contrary, highly hydrophobic fluorine-rich POPs were also prepared [ 21 , 22 ] and applied to capture the vapour of non-polar hydrocarbons and fluorinated compounds. Application-interesting POPs with ionic [ 20 , 23 ], luminescent [ 24 ], chiral [ 25 , 26 ], and other groups [ 27 , 28 ] were also reported in the literature. Unlike inorganic porous materials (zeolites, molecular sieves) or MOF-type materials, POPs are mostly highly stable in an aqueous environment, even in the presence of acids, bases, and salts.…”

Porous Ionic Network/CNT Composite Separator as a Polysulfide Snaring Shield for High Performance Lithium–Sulfur Battery

“…important to develop a simple and efficient diaphragm synthesis method. [27][28][29][30] As a consistent effort of our ongoing work on PINs, [31,32] here we tailored the structure of CNT-coated separator by a simple infiltration of imidazolium-based ionic liquids into it. The following in situ polymerization to produce a porous ionic network PIN/CNT-coated composite separator.…”