Polyfluorene Polyelectrolyte Nanoparticles: Synthesis of Innovative Stabilizers for Heterophase Polymerization

Abstract

Polyfluorene-bearing bromohexyl side chains are quaternized by 1-vinylimidazole in order to attach dialkylimidazolium bromide ionic liquid (IL) species along the conjugated backbone. Subsequently, polyfluorene polyelectrolyte nanoparticles (NPs) of 40 nm in average size are created via radical cross-linking of the pendant vinylimidazolium groups. Anion exchange from Br(-) to BF(4)(-), PF(6)(-), and bis(trifluoromethylsulfonyl)imide anion (TFSI(-) renders NPs adjustable dispersability in various organic solvents. The hydrophobic-conjugated backbone and the hydrophilic dialkylimidazolium bromide IL moieties depict an amphiphilic profile, which allows the NPs to be deployed as conductive stabilizer in the emulsion polymerization of styrene. The resultant latexes are fluorescent, tunable in size and can be transferred to organic solvents without forfeiting their colloidal stability.

Magnetic Poly(Ionic Liquid) Microcapsules for Oil Capture and Recovery

“…Poly(ionic liquid)s (PILs) are a new polymer family which has received increasing interest in areas like energy, environment, biotechnology, and catalysis applications . Interestingly, poly(ionic liquid)s can be designed into a variety of polymeric structures including many different cations and anions which leads to different types of materials that show very unique physicochemical properties.…”

Construction of bifunctional electrochemical biosensors for the sensitive detection of the SARS-CoV-2 N-gene based on porphyrin porous organic polymers

“…By virtue of their low density, abundant porosity, large specific surface, outstanding designability, and excellent photoelectron ability, POPs have been widely explored as new platforms in various promising applications, such as catalysis, 37,38 gas separation/adsorption, 39,40 energy applications 41,42 and organic electronic devices. 43 Furthermore, versatile synthesis methodology, tuneable pore structures and feasibility to combine with other materials significantly accelerate their development. Among these, POPs consist of extended conjugated structures showing features of delocalized π-molecular orbitals, have excellent biocompatibility, and have multiple functionalities which can endow POPs with superior sensing performances.…”

High Molecular Weight Polystyrene Obtained by Cationic Emulsion Polymerization Catalyzed by Imidazolium‐Based Ionic Liquid

“…Styrene, a widely studied commodity, due to its ability to polymerize by various mechanisms (via free radicals, ionic polymerizations and by organometallic complexes), has been used in conjunction with ILs in a variety of ways. ILs can be used as a surfactant or covering agents in styrene polymerizations, as a solvent in cationic polymerization, and more recently as catalyst in cationic polymerization…”