๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Double quantum coherence of quadrupolar I = 1 nuclei: 14N in NH4ClO4

โœ Scribed by E.E. Ylinen; A. Kaikkonen; M. Punkkinen

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
675 KB
Volume
10
Category
Article
ISSN
0926-2040

No coin nor oath required. For personal study only.

โœฆ Synopsis

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 (0,)X-~,-(02)a-r2

[-(e,),-T,].

Here LY and /3 are 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 NH,CIO,. 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. 0 1997 Elsevier Science B.V.

๐Ÿ“œ SIMILAR VOLUMES

Five quantum coherence of I=5/2 nuclei:
Five quantum coherence of I=5/2 nuclei: 27Al in polycrystalline AlCl3
โœ A. Kaikkonen; E.E. Ylinen; M. Punkkinen ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 403 KB

Optimal conditions were calculated for the excitation and detection of the five quantum coherence of quadrupolar nuclei ลฝ . ลฝ . with I s 5r2 in powder samples, observed by the two-pulse sequence u y t y u y t , where a is the phase cycling angle. We varied the pulse lengths and the relative values