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N-15-C-13 Dipole Couplings in Smectic Mesophase of a Thermotropic Ionic Liquid
Univ Pisa, Dipartimento Chim & Chim Ind, I-56124 Pisa, Italy..
Univ Pisa, Dipartimento Chim & Chim Ind, I-56124 Pisa, Italy..
St Petersburg State Univ, Dept Phys, St Petersburg 199034, Russia..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemistry, Applied Physical Chemistry. St Petersburg State Univ, Lab Biomol NMR, St Petersburg 199034, Russia.ORCID iD: 0000-0002-6524-1441
2018 (English)In: Applied Magnetic Resonance, ISSN 0937-9347, E-ISSN 1613-7507, Vol. 49, no 6, p. 553-562Article in journal (Refereed) Published
Abstract [en]

Unique combination of ionic conductivity and anisotropic physical properties in ionic liquid crystals leads to new dynamic properties exploited in modern technological applications. Structural and dynamics information at atomic level for molecules and ions in mesophases can be obtained by nuclear magnetic resonance (NMR) spectroscopy through the measurements of dipole-dipole spin couplings. While C-13-H-1 and N-15-H-1 dipolar NMR spectra can be routinely acquired in samples with natural isotopic abundance, recording N-15-C-13 dipolar NMR spectra is challenging because of the unfavourable combination of two rare isotopes. In the present study, an approach to measure N-15-C-13 dipole-dipole NMR spectra in static liquid crystalline samples with natural abundance is introduced. We demonstrate that well-resolved spectra can be recorded within 10 h of experimental time using a conventional NMR probe and a moderately strong magnetic field. The technique is applied to a thermotropic smectic mesophase formed by an ionic liquid with imidazolium-based organic cation.

Place, publisher, year, edition, pages
SPRINGER WIEN , 2018. Vol. 49, no 6, p. 553-562
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Condensed Matter Physics
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URN: urn:nbn:se:kth:diva-231204DOI: 10.1007/s00723-018-1000-7ISI: 000434352300003PubMedID: 29904238Scopus ID: 2-s2.0-85045624732OAI: oai:DiVA.org:kth-231204DiVA, id: diva2:1229105
Note

QC 20180629

Available from: 2018-06-29 Created: 2018-06-29 Last updated: 2018-06-29Bibliographically approved

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Dvinskikh, Sergey

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