Synthesis of fluorescent hyperbranched poly(aryl ether ketones) containing biphenyl units

Abstract

Hyperbranched poly(aryl ether ketones) with M n = (8–10) × 103 and terminal fluorine atoms have been synthesized through the polycondensation of 3,3′,5,5′-tetramethyl-4,4′-dihydroxydiphenyl(A2) and 1,3,5-tris[4-(4-fluorobenzoyl)phenoxy]benzene (B3) taken at a molar ratio of (0.720–0.675): 1. The replacement of the terminal fluorine atoms by residues of m-N,N-dimethylaminophenol yields polymers demonstrating green-blue fluorescence both in solution and in the solid state. Fluorescence quenching is observed at concentrations of the said polymers in solutions above 3 g/l.