One‐Step Synthesis of Thermosensitive Nanogels Based on Highly Cross‐Linked Poly(ionic liquid)s

Abstract

A gel for all seasons: Thermosensitive nanogels based on highly cross-linked poly(ionic liquid)s (CLPNs) were prepared in one step by the copolymerization of imidazolium-based monomers with cross-linkers in selective solvents. Reversible nanogel-macrogel transitions of CLPNs in methanol could be achieved by changing the temperature.

Novel reversible thermoresponsive nanogel based on poly(ionic liquid)s prepared via RAFT crosslinking copolymerization

“…As demonstrated in the previous studies, hydrogen‐bonding interactions play a significant role in the thermoresponsive behaviors of PIL‐based nanogels. Hydroxyl, amine, and carboxyl groups are often used to construct hydrogen‐bonding systems.…”

“… Thermoresponsive nanogels were prepared for the first time via the copolymerization of the geminal dicationic, 1,4‐butanediyl‐3,3′‐ bis ‐1‐vinyl imidazolium halides, and the crosslinkers described previously under identical conditions. These novel PIL‐based thermoresponsive nanogels can reversibly form precipitates or macrogels in methanol with the temperature changing in the range of −15–25 °C. Experimental studies revealed that the thermoresponse of PIL‐based nanogels can be attributed to hydrogen‐bonding interactions between nanogels.…”

Dendritic Ionic Liquids Based on Imidazolium‐Modified Poly(aryl ether) Dendrimers

“…Poly(ionic liquid)s (PILs), that is, polymerized ionic liquids, combining the properties of ionic liquids and the superior processability afforded by the polymer nature, [4] have been widely used in the fields of catalysis, [5] synthesis, [6] gas adsorption and separation, [7] electrochemistry, [8] and thermoresponsive materials. [9] Replacing polymers with special macromolecules such as hyperbranched polymers or dendrimers in PILs affords hyperbranched or dendritic ionic liquids (BILs or DILs). Various applications of BILs or DILs can be envisioned, such as sorbents, liquid separation media, catalyst scaffolds, dispersing agents, and transporters for shuttling functional materials.…”

Luminescent Materials of Europium(III) Coordinated by a Terpyridine‐Functionalized Poly(Ionic Liquid)

“…The luminescence performance of the luminescent material based on Terpy-PIL, for example the 5 D 0 quantum efficiency and the decay time, is much higher than that of the luminescent material prepared from the monomer Terpy-IL, which can be ascribed to the confinement of the europium(III)-terpyridine complexes to the polymer architecture. [45][46][47] So far, there are no reports about PILs carrying a ligating moiety in each of the repeating units of the polymers, although TSILs carrying complexing groups have already been reported and have been employed in metal separation and extraction processes [14,16,48] and in catalysis after metal complexation. [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Among such polymers, poly(ionic liquid)s (PILs) have attracted considerable attention in the field of polymer chemistry and materials science, because they combine the unique properties of ILs with a macromolecular architecture.…”