Facile synthesis of 1-(N-butyl-1,8-naphthalimide-4′-yl)-3-(4-methoxyl-phenyl)-5-phenyl-pyrazoline/polyaniline core-shell nanofibers and polyaniline nanotubes

1-(N-butyl-1,8-naphthalimide-4'-yl)-3-(4-methoxyl-phenyl)-5-phenyl-pyrazoline (BMPP)/polyaniline core-shell nanofibers were synthesized by in situ chemical oxidative polymerization of aniline using BMPP nanofibers as template. BMPP/polyaniline core-shell nanofibers exhibited uniform fibrilliar morphology and possessed BMPP nanofiber core and polyaniline shell, which existed in the form of nanoparticles. BMPP nanofibers were fabricated by the modified reprecipitation method with water as poor solvent. After BMPP/polyaniline core-shell nanofibers were washed with ethanol as good solvent to remove BMPP cores, polyaniline nanotubes with netlike structures were obtained. The molecular structures of BMPP/polyaniline nanocables were characterized by Fourier transform infrared spectroscopy and UV-vis spectroscopy, respectively. The core/shell structures of BMPP and polyaniline endowed BMPP/polyaniline core-shell nanofibers good electrochemical properties in comparison with BMPP nanofibers. (C) 2010 Elsevier B.V. All rights reserved.