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Selective Detection of Biexponential Relaxation in Isotropic Solutions by Mixed Coherence Filtering NMR

✍ Scribed by Hitoshi Yamada; Johane Takeuchi; Hiroaki Nakamura; Yoshiteru Seo; Akira Tasaki; Tomoki Erata

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 129 KB
Volume: 135
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.1998.1572

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✦ Synopsis

This is a trial to simplize sequences to get the relaxation function f 31 (t), which is usually detected by the double-or triple-quantum filtered (DQF or TQF) NMR in an isotropic phase. The results indicate that only two phase cycling is needed to get the f 31 (t) function, which shows the advantage of S/N (signal-to-noise ratio) in a minimum acquisition time. The filtering of coherence levels in the creation time need not be limited to double-or triple-quantum coherences. An 87 Rb signal from a 4% (w/w) agar powder in 500-mM RbCl solution is recorded at 130.9 MHz as a Larmor frequency using a Bruker MSL 400 spectrometer.

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