The efficient preparation of carbazole‐based conjugated porous polymer films using electrochemical method and their fluorescence property study

Abstract

Poly(2,7-bis(carbazol-9-yl)-9,9-dimethylfluorene) (PBCMF) polymer with porous structure was fabricated, and its electropolymerization was studied comparatively in dichloromethane (CH 2 Cl 2 ) systems in the presence of different contents of boron trifluoride diethyl etherate (BFEE). When adding BFEE in CH 2 Cl 2 solution, the oxidation potential of BCMF could be decreased obviously. When the content of BFEE increased to 40%, BCMF was oxidized at 0.47 V, while it was oxidized at 1.07 V in pure CH 2 Cl 2 solution. A series of experiments showed that the polymer PBCMF films could be easily obtained in CH 2 Cl 2 -BFEE systems, and films obtained from the 40 vol% BFEE system showed best electrochemical behavior and best fluorescence property. Fourier transform infrared spectra and UV-Vis proved the longer conjugated chains of polymers. And scanning electron microscopy images of polymer films showed that all these polymer films made from BFEE systems had a good porous structure.