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ENDOR spectra of vanadyl complexes in asphaltenes
Author(s) -
Atherton Neil M.,
Fairhurst Shirley A.,
Hewson Geoffrey J.
Publication year - 1987
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260250917
Subject(s) - chemistry , asphaltene , porphyrin , spectral line , electron paramagnetic resonance , spectroscopy , crystallography , resonance (particle physics) , nuclear magnetic resonance spectroscopy , photochemistry , nuclear magnetic resonance , stereochemistry , organic chemistry , atomic physics , physics , quantum mechanics , astronomy
It has been suggested, on the basis of electron spin resonance measurements, that the coordination of vanadyl complexed in asphaltenes is porphyrin‐like. We have examined a number of asphaltenes using electron nuclear double resonance (ENDOR) spectroscopy and obtained spectra from 14 N and 1 H nuclei. Comparison of the spectra with those of vanadyl octaethyl‐ and tetraphenyl‐porphyrins confirms that the porphyrin structure does indeed occur in the asphaltenes.