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 |
|