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Fast acquisition of high-resolution NMR spectra in inhomogeneous fields via intermolecular double-quantum coherences
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10.1063/1.3076046
/content/aip/journal/jcp/130/8/10.1063/1.3076046
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/8/10.1063/1.3076046

Figures

Image of FIG. 1.
FIG. 1.

Pulse sequence for high-resolution spectra acquisition in inhomogeneous fields via iDQCs. Full vertical bars stand for nonselective rf pulses, Gauss-shaped pulses are -spin selective rf pulses, and dash rectangles represent CSGs. The phases of the rf pulses are indicated with subscripts.

Image of FIG. 2.
FIG. 2.

NMR spectra of solution of tyrosine in water: (a) conventional SQC spectrum in a well-shimmed field, (b) conventional SQC spectrum in an inhomogeneous field of about 40 Hz linewidth, (c) accumulated projection of the sheared experimental spectrum from (d), (d) 2D iDQC spectrum in the same inhomogeneous field using the IDEAL-II sequence, and (e) five expanded regions after rotation of (d) and their accumulated projection. The insets are magnified in both vertical and horizontal directions.

Image of FIG. 3.
FIG. 3.

NMR spectra of tyrosine in water in an inhomogeneous field of 500 Hz linewidth: (a) 2D iDQC spectrum using the IDEAL-II sequence, together with the conventional single-pulse SQC 1D spectrum under the same field inhomogeneity above it, and (b) expanded regions of iDQC spectrum in (a) after rotation.

Image of FIG. 4.
FIG. 4.

Partial NMR spectra of histidine and malic acid in water: (a) conventional SQC spectrum in a well-shimmed field (with individual multiplets expanded above the full spectrum), (b) conventional SQC spectrum in an inhomogeneous field of about 30 Hz linewidth, (c) accumulated projection of the rotated 2D spectrum from (d), and (d) 2D iDQC spectrum in the same inhomogeneous field using the IDEAL-II sequence. The insets are magnified in both vertical and horizontal directions.

Image of FIG. 5.
FIG. 5.

2D iDQC spectra of a piece of grape sarcocarp: (a) conventional 1D NMR spectrum with the linewidth for water of about 100 Hz, (b) 2D iDQC spectrum using the IDEAL-II sequence after a counterclockwise rotation of 63.4° and projection. The insets are magnified 50 times for (a) and 10 times for (b) in the vertical direction.

Tables

Generic image for table
Table I.

Comparison of pulse sequences for high-resolution NMR in inhomogeneous fields via iMQCs.

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/content/aip/journal/jcp/130/8/10.1063/1.3076046
2009-02-27
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fast acquisition of high-resolution NMR spectra in inhomogeneous fields via intermolecular double-quantum coherences
http://aip.metastore.ingenta.com/content/aip/journal/jcp/130/8/10.1063/1.3076046
10.1063/1.3076046
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