Long-lived coherences: Improved dispersion in the frequency domain using continuous-wave and reduced-power windowed sustaining irradiation

被引：8

作者：

Sadet, A. ^{[1
]}

Fernandes, L. ^{[1
]}

Kateb, F. ^{[1
]}

Balzan, R. ^{[1
]}

Vasos, P. R. ^{[1
]}

机构：

[1] Univ Paris 05, CNRS, La Chim & Biochim Toxicol & Pharmacol, UMR 8601,PRES Paris Sorbonne Cite, F-75006 Paris, France

来源：

JOURNAL OF CHEMICAL PHYSICS | 2014年 / 141卷 / 05期

关键词：

NUCLEAR-MAGNETIC-RESONANCE; MODEL-FREE APPROACH; SINGLET-STATE; NMR-SPECTROSCOPY; SPIN STATES; RELAXATION-TIMES; FIELD; MACROMOLECULES; POLARIZATION; ENHANCEMENT;

D O I：

10.1063/1.4891565

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Long-lived coherences (LLC's) are detectable magnetisation modes with favourable relaxation times that translate as sharp resonances upon Fourier transform. The frequency domain of LLC's was previously limited to the range of J-couplings within pairs of homonuclear spins. LLC evolution at high magnetic fields needs to be sustained by radio-frequency irradiation. We show that LLC-based spectral dispersion can be extended beyond the J-couplings domain using adapted carrier offsets and introduce a new reduced-power sustaining method to preserve LLC's within the required range of offsets. Spectral resolution is enhanced as the natively narrow lines of LLC's are further dispersed, making them potential probes for the study of biomolecules featuring strong resonance overlap and for media where NMR spectroscopy is commonly hindered by line broadening. (C) 2014 AIP Publishing LLC.

引用

页数：7