Ultra High-Resolution NMR: Sustained Induction Decays of Long-Lived Coherences

被引：22

作者：

Bornet, Aurelien ^{[1
]}

Jannin, Sami ^{[1
]}

Konter, J. A. ^{[2
]}

Hautle, Patrick ^{[2
]}

van den Brandt, Ben ^{[2
]}

Bodenhausen, Geoffrey ^{[1
,3
,4
,5
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[3] Ecole Normale Super, Dept Chim, F-75231 Paris 05, France

[4] Univ Paris 06, Paris, France

[5] CNRS, UMR 7203, Paris, France

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 39期

基金：

瑞士国家科学基金会;

关键词：

NUCLEAR-MAGNETIC-RESONANCE; CROSS-POLARIZATION; SPECTROSCOPY; STATES; TIMES;

D O I：

10.1021/ja2052792

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Long-lived coherences (LLCs) in homonuclear pairs of chemically inequivalent spins can be excited and sustained during protracted radio frequency irradiation periods that alternate with brief windows for signal observation. Fourier transformation of the sustained induction decays recorded in a single scan yields NMR spectra with line-widths in the range 10 < Delta v < 100 mHz, even in moderately inhomogeneous magnetic fields. The resulting doublets, which are reminiscent of J-spectra, allow one to determine the sum of scalar and residual dipolar interactions in partly oriented media. The signal intensity can be boosted by several orders of magnitude by "dissolution" dynamic nuclear polarization (DNP).

引用

页码：15644 / 15649

页数：6

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