A1 Refereed original research article in a scientific journal
Proton double quantum coherence and cross-relaxation in (NH4)(2)SnBr6
Authors: Punkkinen M, Kaikkonen A, Ylinen EE, Kankaanpaa M, Vuorimaki AH
Publisher: ELSEVIER SCIENCE BV
Publication year: 1998
Journal:: Solid State Nuclear Magnetic Resonance
Journal name in source: SOLID STATE NUCLEAR MAGNETIC RESONANCE
Journal acronym: SOLID STATE NUCL MAG
Volume: 13
Issue: 3
First page : 167
Last page: 173
Number of pages: 7
ISSN: 0926-2040
DOI: https://doi.org/10.1016/S0926-2040(98)00083-6
Abstract
A proton double quantum coherence signal can be observed exclusively from the T species NH4 groups (with the total spin I = 1 in ammonium compounds at low temperatures by the three-pulse sequence 90 degrees(x) - t(pr) - 90 degrees(x) - t(ev) - 90 degrees(x) - t(a),where t(pr) and t(a) are of the magnitude of the inverse line width and t(ev) very short. The usefulness of this pulse sequence, preceded by the additional pulse sequence 90 degrees(x) - t(1) - 90 degrees(-x) - t(2) for creating an unbalance between the A and T species magnetizations, by applying it to cross-relaxation studies in (NH4)(2)SnBr6. (C) 1998 Elsevier Science B.V. All rights reserved.
A proton double quantum coherence signal can be observed exclusively from the T species NH4 groups (with the total spin I = 1 in ammonium compounds at low temperatures by the three-pulse sequence 90 degrees(x) - t(pr) - 90 degrees(x) - t(ev) - 90 degrees(x) - t(a),where t(pr) and t(a) are of the magnitude of the inverse line width and t(ev) very short. The usefulness of this pulse sequence, preceded by the additional pulse sequence 90 degrees(x) - t(1) - 90 degrees(-x) - t(2) for creating an unbalance between the A and T species magnetizations, by applying it to cross-relaxation studies in (NH4)(2)SnBr6. (C) 1998 Elsevier Science B.V. All rights reserved.
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