Facile electrochemical preparation of poly(9,9‐dichlorofluorene), a new polyfluorene derivative as green light emitter

Abstract

High-quality poly(9,9-dichlorofluorene) (PDCF), a new part soluble polyfluorene derivative, was easily synthesized electrochemically by direct anodic oxidation of 9,9dichlorofluorene (DCF) in boron trifluoride diethyl etherate (BFEE) containing 15% (by volume) trifluoroacetic acid (TFA). It was hard for DCF to deposit on the electrode in neutral solvents such as CH 3 CN system. This methodology may help promotion of researches to reveal unknown properties and applications of polyfluorene materials. PDCF films with conductivity of 3.3 Â 10 À2 S cm À1 obtained from this media show good redox activity and thermal stability. The structure and morphology of the polymer were studied by UV-vis, FTIR, 1 H NMR spectra, and scanning electron microscopy, respectively. The results of quantum chemistry calculations and the spectroscopies of dedoped PDCF indicate that the polymerization of DCF mainly occurs via C (2) and C (7) position. Fluorescent spectral studies indicate that PDCF film with high fluorescence quantum yields and photochemical stability is a novel green light emitter.

High fluorescent ethyl acrylate modified PEDOT‐MeNH2 with enhanced electrochromic performance

“…These polymers show good performances such as good solubility in common organic solvents, high fluorescence quantum yields and high thermal stability . However, these polymers are mainly hindered by the lack of suitable synthetic methods, poorly conjugated, and difficulty of polymerization . Considering the quite limited research on fluorescent polymers and their performance defects, the design and syntheses of new fluorescent polymers are necessary and significant, and still present a considerable challenge.…”