Crosslinked 1,2,4-triazolium-type poly(ionic liquid) nanoparticles

A knitting copolymerization strategy to build porous polytriazolium salts for removal of anionic dyes and MnO4. Macromol Rapid Commun 2022;43:e2200170. [PMID: 35471590 DOI: 10.1002/marc.202200170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0]

Although considerable efforts have been devoted, the development of novel ionic porous networks (IPNs) 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. We expect that the strategy reported herein can be extended to the development of other potential efficient adsorbents in water purifications. This article is protected by copyright. All rights reserved.

Effects of repeat unit charge density on the physical and electrochemical properties of novel heterocationic poly(ionic liquid)s

The higher the charge density of PILs the higher their T_g and the lower their conductivity; the best conductivity (1.8 × 10⁻⁵ S cm⁻¹ at 25 °C): PILs with triazolium cations; the best cathodic stability (−0.4 V vs. Li⁺/Li at 70 °C): PILs with mixed type cations.

Linear Main-Chain 1,2,4-Triazolium Poly(ionic liquid)s: Single-Step Synthesis and Stabilization of Cellulose Nanocrystals

Linear main-chain 1,2,4-triazolium-based poly(ionic liquid)s (PILs) were synthesized in this contribution. The polymerization process is experimentally very simple and involves only a single-step polycondensation of a commercially available monomer in DMSO as solvent at 120 °C. Their thermal stability and solubility were analyzed in terms of different counteranions. Due to the ease of this synthetic route, it was readily applied to graft onto sulfonated cellulose nanocrystals (CNCs) via a one-step in situ polymerization. The as-synthesized PIL@CNC hybrid colloids exhibit adaptive dispensability in water and organic solvents.

Ionic liquid syntheses via click chemistry: expeditious routes toward versatile functional materials

The application of click reaction (e.g. CuAAC, thiol–X, oxime formation and nucleophilic ring opening) has recently begun to draw attention for efficient and robust synthesis of new functional ionic liquids, requiring minimal purification.

Pure hydrophilic block copolymer vesicles with redox- and pH-cleavable crosslinks

The formation and stimuli cleavable crosslinking of completely water drained double hydrophilic block copolymer vesicles is presented.

Highly functional ellipsoidal block copolymer nanoparticles: a generalized approach to nanostructured chemical ordering in phase separated colloidal particles

Spatially controlled introduction of chemical functionalities into ellipsoidal block copolymer nanoparticles is achieved through pre- and post-assembly strategies.