Photoluminescent phenylated polyfluorenes synthesized in an organic solvent and supercritical carbon dioxide

Diels–Alder Cycloaddition Reactions in Sustainable Media

“…In addition, scCO 2 has the ability to dissolve organic compounds and can be easily removed from the reaction mixture, making it a sustainable alternative to conventional organic solvents in synthetic transformations [27][28][29][30][31]. Keshtov et al disclosed a green approach for the synthesis of photoluminescent polymers based on phenyl-substituted polyfluorenes using scCO 2 as the solvent medium [82]. Phenylated polyfluorenes 88 were synthesized through a catalyst-free Diels-Alder reaction of fluorene-containing bis(tetraarylcyclopentadienone) monomer 86, acting as diene, with bis(acetylenes) 87 acting as 2π-component (Scheme 19).…”

Achievements in polycondensation and condensation polymers

“…Note that these polymers are successively formed in both common organic solvents and supercritical СО 2 [141,145]. The incorporation of complexing fragments into the main chain of polyfluorenes allows their use as chemosensors for transition metal ions and high efficiency light emitting iridium containing materials [146,147].…”

“…The Diels-Alder cycloaddi tion is one of the methods of obtaining these polymers [151]. This method is employed for the synthesis of both initial monomers and polymers [145,152].…”