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Effect of sample age of fluorocarbons on MC800 asphaltene on dynamic nuclear polarization parameters

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Title Effect of sample age of fluorocarbons on MC800 asphaltene on dynamic nuclear polarization parameters
 
Creator Hüseyin
Ovalioglu
 
Subject Asphaltene
Dynamic nuclear polarization
Fluorobenzene
Overhauser effect
 
Description 195-200
Nuclear Magnetic Resonance and Overhauser effect type dynamic nuclear polarization (DNP) experiments were
performed to study suspensions of asphaltene in the fluorocarbons at a low magnetic field of 1.53 mT at room temperature.
Asphaltene was extracted from MC800 liquid asphalt, which was Heavy Iran origin. Each sample of the solvent medium
was produced at three different concentrations of asphaltene. These samples were kept for a period of seven years until DNP
parameters were discovered through new DNP tests. The influence of sample age on parameters of DNP was studied and
then the findings were analyzed. It was found that the  nuclear-electron coupling parameter was smaller. In low magnetic
fields the nuclear-electron coupling parameter. varies from +0.5 (pure dipolar) to -1.0 (pure scalar), and new  obtained
values are between these limits. New  values in our study are positive and this shows that the dipolar part of intermolecular
spin-spin interactions is dominant.
 
Date 2022-05-17T10:18:37Z
2022-05-17T10:18:40Z
2022-05-17T10:18:37Z
2022-05-17T10:18:40Z
2022-03
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscair.res.in/handle/123456789/59726
 
Language en
 
Publisher CSIR-NIScPR, India
 
Source IJCT Vol.29(2) [March 2022]