Measurement of dipolar couplings in partially oriented molecules by local field NMR spectroscopy with low-power decoupling

被引：8

作者：

Marjanska, M ^{[1
]}

Castiglione, F ^{[1
]}

Walls, JD ^{[1
]}

Pines, A ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Mat Sci, Berkeley, CA 94720 USA

来源：

JOURNAL OF MAGNETIC RESONANCE | 2002年 / 158卷 / 1-2期

关键词：

liquid crystalline solvents; NMR; proton-detected local field; PDLF; phase-modulated Lee-Goldburg; PMLG; heteronuclear spin-spin couplings; multiple pulse sequence;

D O I：

10.1016/S1090-7807(02)00059-9

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Low-power phase-modulated Lee-Goldburg homonuclear decoupling was used to record PDLF spectra of fluorine-substituted benzene derivatives dissolved in nematic thermotropic liquid crystalline solvents. The low-power decoupling minimizes sample heating during RE irradiation while still achieving highly resolved PDLF spectra. The method is illustrated by recording spectra for 1,3-dichloro-4-fluoro-5-nitrobenzene, 1,3-dichloro-4-fluorobenzene, and 1, 2-difluoro benzene dissolved in different nematic solvents. (C) 2002 Elsevier Science (USA). All rights reserved.

引用

页码：52 / 59

页数：8

共 23 条

[1] LOW-POWER MULTIPULSE LINE NARROWING IN SOLID-STATE NMR [J].

BURUM, DP ;

LINDER, M ;

ERNST, RR .

JOURNAL OF MAGNETIC RESONANCE, 1981, 44 (01) :173-188

[2] ANALYSIS OF MULTIPLE PULSE NMR IN SOLIDS .3. [J].

BURUM, DP ;

RHIM, WK .

JOURNAL OF CHEMICAL PHYSICS, 1979, 71 (02) :944-956

[3] Measurement of carbon-proton dipolar couplings in liquid crystals by local dipolar field NMR spectroscopy [J].

Caldarelli, S ;

Hong, M ;

Emsley, L ;

Pines, A .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (48) :18696-18701

[4]

Castiglione F, 2001, LIQ CRYST, V28, P1403, DOI 10.1080/0267890110066372

[5] AN INVESTIGATION OF THE CONFORMATION OF 4-CHLOROETHYLBENZENE AS A SOLUTE IN A NEMATIC LIQUID-CRYSTALLINE SOLVENT [J].

CELEBRE, G ;

DELUCA, G ;

LONGERI, M ;

CATALANO, D ;

LUMETTI, M ;

EMSLEY, JW .

MOLECULAR PHYSICS, 1995, 85 (02) :221-231

[6]

DONG RY, 1996, NUCL MAGNETIC RESONA

[7]

Emsley J.W., 1996, ENCY NMR, P2781

[8] AN NMR-STUDY OF THE CONFORMATIONAL FLEXIBILITY OF PHENYL ACETATE DISSOLVED IN A NEMATIC LIQUID-CRYSTALLINE SOLVENT [J].

FOORD, EK ;

COLE, J ;

CRAWFORD, MJ ;

EMSLEY, JW ;

CELEBRE, G ;

LONGERI, M ;

LINDON, JC .

LIQUID CRYSTALS, 1995, 18 (04) :615-621

[9] 13C NMR of liquid crystals with different proton homonuclear dipolar decoupling methods [J].

Fung, BM ;

Ermolaev, K ;

Yu, YL .

JOURNAL OF MAGNETIC RESONANCE, 1999, 138 (01) :28-35

[10] THE EFFECT OF RADIOFREQUENCY HEATING IN C-13 NMR-STUDIES OF LIQUID-CRYSTALS [J].

FUNG, BM .

JOURNAL OF MAGNETIC RESONANCE, 1990, 86 (01) :160-163

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