Facile electrosynthsis of poly (pyrene-1-sulfonic acid sodium salt) film: A good candidate for blue light-emitting diodes applications

Pyrene-1-sulfonic acid sodium salt (PyS) was chemically synthesized, and its polymer film, poly (pyrene-1-sulfonic acid sodium salt) (PPyS), was successfully electropolymerized by direct anodic oxidation both in aqueous and boron trifluoride diethyl etherate (BFEE) systems. The PPyS films showed good redox activity and structural stability even in SA. The impedance spectra of PPyS films indicated that the electron transfer resistance was about 23 Ω. The fluorescent result exhibited that the emission band of PPyS was red-shifed at least 76 nm in comparison with the monomer. Both the impedance and the fluorescent spectra demonstrated that the PPyS films were good semiconducting polymer and excellent blue-light-emitting materials, respectively.