A1 Refereed original research article in a scientific journal
Double quantum coherence of quadrupolar I=1 nuclei: N-14 in NH4ClO4
Authors: Ylinen EE, Kaikkonen A, Punkkinen M
Publisher: ELSEVIER SCIENCE BV
Publication year: 1997
Journal:: Solid State Nuclear Magnetic Resonance
Journal name in source: SOLID STATE NUCLEAR MAGNETIC RESONANCE
Journal acronym: SOLID STATE NUCL MAG
Volume: 10
Issue: 1-2
First page : 25
Last page: 31
Number of pages: 7
ISSN: 0926-2040
DOI: https://doi.org/10.1016/S0926-2040(97)00026-X
Abstract
We have calculated optimal conditions for observing the double quantum coherence of quadrupolar nuclei I = 1 in single crystals and powders after the two and three pulse sequences (theta(1))(x)-tau(1)-(theta(2))(alpha)-tau(2) [-(theta(3))(beta)-tau(3)]. Here alpha and beta the phase-cycling angles, which were incremented properly to select the desired coherence transfer pathways. Experiments for double quantum excitation and detection were performed on the single crystal and powder samples of NH4ClO4. Because of a fast decay of the signal from the powder after the two-pulse sequence, we employed the third pulse to produce an echo related to the double quantum coherence. (C) 1997 Elsevier Science B.V.
We have calculated optimal conditions for observing the double quantum coherence of quadrupolar nuclei I = 1 in single crystals and powders after the two and three pulse sequences (theta(1))(x)-tau(1)-(theta(2))(alpha)-tau(2) [-(theta(3))(beta)-tau(3)]. Here alpha and beta the phase-cycling angles, which were incremented properly to select the desired coherence transfer pathways. Experiments for double quantum excitation and detection were performed on the single crystal and powder samples of NH4ClO4. Because of a fast decay of the signal from the powder after the two-pulse sequence, we employed the third pulse to produce an echo related to the double quantum coherence. (C) 1997 Elsevier Science B.V.
UTU Research Portal