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Dostęp zamkniętyNMR shielding in helium-3 atoms modified by gaseous nitrogen and oxygen
| dc.abstract.en | Helium‐3 nuclear magnetic resonance (3He NMR) measurements were carried out for the gaseous mixtures of helium‐3 with pure nitrogen and synthetic air as the solvents. It was found that 3He shielding is linearly dependent on solvent density up to approx. 6 mol/L. At higher density of the gaseous solvent, the change of 3He shielding is nonlinear and especially distinct when helium‐3 atoms can interact with two O2 molecules. The interaction with paramagnetic oxygen molecules can induce two kinds of 3He shielding changes: (1) due to the isotropic Fermi contact interaction and (2) from the dipolar magnetic interaction between unpaired O2 electrons and 3He nuclear magnetic dipole moment. The two paramagnetic effects in helium‐3 shielding cannot be experimentally separated, although for such small molecular objects, they could be presumably modeled by advanced theoretical calculations. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Garbacz, Piotr |
| dc.contributor.author | Misiak, Maria |
| dc.contributor.author | Jackowski, Karol |
| dc.date.accessioned | 2024-01-25T13:50:24Z |
| dc.date.available | 2024-01-25T13:50:24Z |
| dc.date.issued | 2020 |
| dc.description.finance | Publikacja bezkosztowa |
| dc.description.number | 8 |
| dc.description.volume | 58 |
| dc.identifier.doi | 10.1002/MRC.5030 |
| dc.identifier.issn | 0749-1581 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/113803 |
| dc.identifier.weblink | https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fmrc.5030 |
| dc.language | eng |
| dc.pbn.affiliation | chemical sciences |
| dc.relation.ispartof | Magnetic Resonance in Chemistry |
| dc.relation.pages | 745-749 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | gas phase 3He NMR |
| dc.subject.en | helium-3 magnetic shielding |
| dc.subject.en | intermolecular interactions with N2 and O2 molecules |
| dc.subject.en | paramagnetic effects in 3He shielding |
| dc.title | NMR shielding in helium-3 atoms modified by gaseous nitrogen and oxygen |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |