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dc.contributor.author | Mamin G. | |
dc.contributor.author | Gafurov M. | |
dc.contributor.author | Yusupov R. | |
dc.contributor.author | Gracheva I. | |
dc.contributor.author | Ganeeva Y. | |
dc.contributor.author | Yusupova T. | |
dc.contributor.author | Orlinskii S. | |
dc.date.accessioned | 2018-09-19T20:37:14Z | |
dc.date.available | 2018-09-19T20:37:14Z | |
dc.date.issued | 2016 | |
dc.identifier.issn | 0887-0624 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/143063 | |
dc.description.abstract | © 2016 American Chemical Society.A series of 12 asphaltene samples extracted from heavy oils and the oxidized bitumen of different origin has been studied with high-frequency W-band (94 GHz) pulsed electron paramagnetic resonance (EPR) spectroscopy. Transverse (T2e) and longitudinal (T1e) relaxation times of the free radical (FR) and the vanadyl porphyrin (VO2+) were measured for each sample. A significant contribution of the spectral diffusion to T2e has been revealed and ascribed to the dipole-dipole interaction between the FR and VO2+. This indicates that the distance between the FR and VO2+ does not exceed a few nanometers, which means, in turn, that VO2+ can participate in construction of the asphaltene aggregates via the intermolecular interactions. | |
dc.relation.ispartofseries | Energy and Fuels | |
dc.title | Toward the Asphaltene Structure by Electron Paramagnetic Resonance Relaxation Studies at High Fields (3.4 T) | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 9 | |
dc.relation.ispartofseries-volume | 30 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 6942 | |
dc.source.id | SCOPUS08870624-2016-30-9-SID84988358037 |