Pulse sequence symmetries in the nuclear magnetic resonance of spinning solids:: Application to heteronuclear decoupling

被引:148
作者
Edén, M [1 ]
Levitt, MH [1 ]
机构
[1] Univ Stockholm, Arrhenius Lab, Div Phys Chem, S-10691 Stockholm, Sweden
关键词
D O I
10.1063/1.479410
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
We develop the average Hamiltonian theory of a class of symmetrical radio-frequency pulse sequences in the NMR of rotating solids. Theorems are presented which allow one to predict the elimination of many average Hamiltonian terms, without detailed calculation. These results are applied to the problem of heteronuclear decoupling in the presence of rapid magic angle spinning. We present sequences which minimize the number of heteronuclear terms at the same time as recoupling the homonuclear interactions of the irradiated spins. The performance of the new sequences is tested on C-13 labeled calcium formate. Experimental measurements of double-quantum H-1 excitation indicate a relationship between good heteronuclear decoupling of the observed spin species and efficient recoupling of the irradiated spin species. The heteronuclear decoupling performance of the new sequences is significantly better than that obtained with an unmodulated radio-frequency field. The decoupling performance is improved further by breaking the pulse sequence symmetry in a controlled fashion. (C) 1999 American Institute of Physics. [S0021-9606(99)00228-7].
引用
收藏
页码:1511 / 1519
页数:9
相关论文
共 33 条
[1]   Total correlation spectroscopy in the solid state. The use of scalar couplings to determine the through-bond connectivity [J].
Baldus, M ;
Meier, BH .
JOURNAL OF MAGNETIC RESONANCE SERIES A, 1996, 121 (01) :65-69
[2]   HETERONUCLEAR DECOUPLING IN ROTATING SOLIDS [J].
BENNETT, AE ;
RIENSTRA, CM ;
AUGER, M ;
LAKSHMI, KV ;
GRIFFIN, RG .
JOURNAL OF CHEMICAL PHYSICS, 1995, 103 (16) :6951-6958
[3]  
BENNETT AE, 1994, NMR-B PR PR, V33, P1
[4]  
BRINKMANN A, 1998, UNPUB 39 EXP NMR C A
[5]  
BRINKMANN A, IN PRESS
[6]   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
[7]   ROTATION-SYNCHRONIZED HOMONUCLEAR DIPOLAR DECOUPLING [J].
DEMCO, DE ;
HAFNER, S ;
SPIESS, HW .
JOURNAL OF MAGNETIC RESONANCE SERIES A, 1995, 116 (01) :36-45
[8]   Excitation of carbon-13 triple quantum coherence in magic-angle-spinning NMR [J].
Eden, M ;
Levitt, MH .
CHEMICAL PHYSICS LETTERS, 1998, 293 (3-4) :173-179
[9]   Second-order recoupling of chemical-shielding and dipolar-coupling tensors under spin decoupling in solid-state NMR [J].
Ernst, M ;
Bush, S ;
Kolbert, AC ;
Pines, A .
JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (09) :3387-3397
[10]   High-speed magic-angle spinning 13C MAS NMR spectra of adamantane:: Self-decoupling of the heteronuclear scalar interaction and proton spin diffusion [J].
Ernst, M ;
Verhoeven, A ;
Meier, BH .
JOURNAL OF MAGNETIC RESONANCE, 1998, 130 (02) :176-185