Multifrequency (X-band to W-band) CW EPR of the organic free radical in petroleum asphaltene

Petroleum of Arabian and Colombian origin was studied by electron paramagnetic resonance (EPR) spectroscopy at X- (9 GHz), Q- (34 GHz) and W-bands (94 GHz). The experiments were performed at room temperature (about 300 K) and at 77 K (W-band only). The asymmetry in the lines corresponding to free ra...

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Veröffentlicht in:	Applied magnetic resonance 2005-12, Vol.29 (4), p.569-575
Hauptverfasser:	Di Mauro, E., Guedes, C. L. B., Nascimento, O. R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Asphaltenes Electron paramagnetic resonance Free radicals Microwave frequencies Molecular structure Room temperature Spectra Superhigh frequencies
Online-Zugang:	Volltext
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