Molecular self-healing mechanisms between C60-fullerene and anthracene unveiled by Raman and two-dimensional correlation spectroscopy. Issue 27 (21st June 2016)

• Record Type: Journal Article
• Authors: Geitner, R.; Kötteritzsch, J.; Siegmann, M.; Fritzsch, R.; Bocklitz, T. W.; Hager, M. D.; Schubert, U. S.; Gräfe, S.; Dietzek, B.; Schmitt, M.; Popp, J.
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 27(2016)
• Page Start: 17973
• Page End: 17982
• Publication Date: 2016-06-21
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp03464k
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : C60 -fullerene–anthracene self-healing copolymers were studied by time-, temperature- and concentration-dependent FT-Raman spectroscopy and advanced 2D correlation analysis. Abstract : The self-healing polymer P(LMA- co -MeAMMA) crosslinked with C60 -fullerene has been studied by FT-Raman spectroscopy in combination with two-dimensional (2D) correlation analysis and density functional theory calculations. To unveil the molecular changes during the self-healing process mediated by the Diels–Alder equilibrium between 10-methyl-9-anthracenyl groups and C60 -fullerene different anthracene–C60 -fullerene adducts have been synthesized and characterized by time-, concentration- and temperature-dependent FT-Raman measurements. The self-healing process could be monitored via the C60 -fullerene vibrations at 270, 432 and 1469 cm −1 . Furthermore, the detailed analysis of the concentration-dependent FT-Raman spectra point towards the formation of anthracene–C60 -fullerene adducts with an unusual high amount of anthracene bound to C60 -fullerene in the polymer film, while the 2D correlation analysis of the temperature-dependent Raman spectra suggests a stepwise dissociation of anthracene–C60 -fullerene adducts, which are responsible for the self-healing of the polymer.