Abstract
The first-derivative continuous-wave EPR spectrum of polypyrrole deposited on gold wire, tungsten wire, platinum-coated tungsten wire, or platinum foil is a singlet with a peak-to-peak linewidth of 0.2 to 0.46. However, when a film of polypyrrole is deposited on platinum or palladium wire (1.0 mm diameter), the X-band signal is an apparent doublet with a splitting of 0.6 6 (Pt) or 2.2 G (Pd), which is attributed to the perturbation of the magnetic field by the relatively high magnetic susceptibility of the wire. The splitting of the polypyrrole signal on 0.25 mm diameter Pd or Pt wire increased as the external field was increased with S band (1260 G) < X band (3270 G) < Q band (12,550 G). The variation in magnetic field around the Pt and Pd wires was confirmed by spectral-spatial EPR imaging at X band. The splitting of the EPR signals and the spatial variation of the magnetic field in the images are in good agreement with calculations of the effect of an infinitely long cylinder of magnetic material on a static magnetic field.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
