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Type: Artigo de periódico
Title: Ese Studies Of Pristine Paramagnetic Species Of Ceo Powder Samples
Author: Pinhal N.M.
Vugman N.V.
Herbst M.H.
Dias G.H.M.
Abstract: Paramagnetic centers in pristine polycrystalline C60 samples are investigated at room temperature using continuous wave electron paramagnetic resonance (CW-EPR) and electron spin-echo spectroscopy. Two paramagnetic species, with same measured g-values, are separated using echo-detected EPR and the PEANUT pulse scheme. Electron-spin nutation frequencies for both species are measured using the latter technique. For the doublet species, usually observed by CW-EPR, nutation frequency is 7.5 MHz. The second species, with a nutation frequency of 10.4 MHz, is a spin triplet. This species is solely revealed by pulse methods and corresponds to dipolar coupling of C60 paramagnetic centers located at the diagonals of the fullerene fee lattice. © 2000 American Chemical Society.
Rights: fechado
Identifier DOI: 
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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