Solid-state NMR study of 15N labelled polyaniline upon reaction with DPPH
作者： Zoran D. Zujovic , Marija R. Gizdavic-Nikolaidis , Paul A. Kilmartin , Hicham Idriss , Sanjaya D. Senanayake
DOI: 10.1016/J.POLYMER.2005.12.058
关键词: Polyaniline 、 Nuclear chemistry 、 Aniline 、 Chemical binding 、 Imine 、 Solid-state nuclear magnetic resonance 、 Radical 、 Organic chemistry 、 Chemistry 、 Redox 、 DPPH
摘要: Abstract The quantitative investigation of the radical scavenging properties polyaniline (PANI) upon reaction with excess stable DPPH (a 4:1 ratio to aniline units in polymer) was carried out using 15N and 13C solid state NMR spectroscopy. During process oxidised so that imine content increased from 45 65%. extent oxidation measured by confirmed N1s XPS analysis. However, within a 30 min time, about 85% radicals were scavenged as monitored decay its EPR signal. This is 20 times greater than fraction required oxidize PANI an 45–65%. An identification further redox processes explain high degree scavenging. At same there no evidence significant chemical binding or trapping structure.
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