Cationic Poly(ionic liquid) with Tunable Lower Critical Solution Temperature-Type Phase Transition

Abstract

A cationic polyelectrolyte based on the styrenic ionic liquid tributyl-4-vinylbenzylphosphonium pentanesulfonate was found to undergo a lower critical solution temperature (LCST)-type phase transition in aqueous solutions. This phase transition occurs in a wide temperature range in terms of polymer concentration as well as type and concentration of externally added salts. Anion exchange and salting out effects are responsible for the flexible phase transition temperature.

Switching Light Transmittance by Responsive Organometallic Poly(ionic liquid)s: Control by Cross Talk of Thermal and Redox Stimuli

“…The targeted physicochemical properties of polymerizable ionic liquids can be maintained even after polymerization. [26][27][28] We observe here a similar behavior. [26][27][28][29][30] The PFS polyanion bearing sulfonate side groups and nBu 4 P + counterions were found to undergo a reversible LCSTtype phase transition in water (Figure 2), originating from the interaction between water molecules and the ionic liquid moieties at the side groups.…”

Backbone‐Based LCST‐Type Hyperbranched Poly(oligo(ethylene glycol)) with CO2‐Reversible Iminoboronate Linkers

“…In recent years, water‐soluble polymers exhibiting a soluble–insoluble phase transition at the lower critical solution temperature (LCST) in water have been actively studied for their potential use in controlled drug delivery, biomedical soft materials, etc . Perhaps the ethylene glycol‐based polymers, such as poly(ethylene glycol) (PEG) or oligo(ethylene glycol) (OEG) functionalized polymers, are the most promising thermo‐responsive polymers due to their outstanding biocompatibility .…”

Polyoxometalate-based phase transfer catalysis for liquid–solid organic reactions: a review

“…[1][2][3][4][5][6][7] Homogeneous catalysts usually exhibit high activity but have difficulty in separation, recovery and reuse. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Traditionally, the term "phase transfer catalysis" is reserved for catalysts that mediate the transfer of inorganic ions from an aqueous phase into another organic phase where they bring about a reaction. [6][7][8] Alternatively, many efforts have been devoted to Yu Zhou was develop phase transfer catalysts (PTCs), which are homogeneous during the reaction and heterogeneous at the end of the reaction.…”

“…[9][10][11][12][13][14][15][16][17][18][19][20][21][22] Among them, POMs are one of the most attractive candidates in this area. [9][10][11][12][13][14][15][16][17][18][19][20][21][22] Among them, POMs are one of the most attractive candidates in this area.…”