TY - JOUR
T1 - Transverse magnetization transfer under planar mixing conditions in spin systems consisting of three coupled spins 1/2
AU - Luy, Burkhard
AU - Glaser, Steffen J.
N1 - Funding Information:
S.J.G. and B.L. thank the Fonds der Chemischen Industrie and the DFG for financial support (Gl 203/1-6 and Gl 203/3-1; Emmy Noether fellowship LU 835/1).
PY - 2003/10
Y1 - 2003/10
N2 - Polarization transfer under planar mixing conditions is a widely used tool in modern NMR-experiments. In the case of two coupled spins 1/2 or a chain of three or more spins 1/2 with only nearest neighbor couplings, it is only possible to transfer a single magnetization component (longitudinal magnetization in the principle axis system of the planar coupling tensors). However, if all couplings in a three-spin system are non-zero, it turns out that all magnetization components can be efficiently transferred even under strictly planar mixing conditions. In this article a detailed theoretical analysis is presented based on analytical transverse coherence transfer functions and on the underlying commutator algebra. In addition, transverse magnetization transfer is demonstrated experimentally. The results show that in highly coupled spin systems, as for example in the case of partially aligned samples with many residual dipolar couplings, special care has to be taken to avoid phase distortions if planar mixing steps are used.
AB - Polarization transfer under planar mixing conditions is a widely used tool in modern NMR-experiments. In the case of two coupled spins 1/2 or a chain of three or more spins 1/2 with only nearest neighbor couplings, it is only possible to transfer a single magnetization component (longitudinal magnetization in the principle axis system of the planar coupling tensors). However, if all couplings in a three-spin system are non-zero, it turns out that all magnetization components can be efficiently transferred even under strictly planar mixing conditions. In this article a detailed theoretical analysis is presented based on analytical transverse coherence transfer functions and on the underlying commutator algebra. In addition, transverse magnetization transfer is demonstrated experimentally. The results show that in highly coupled spin systems, as for example in the case of partially aligned samples with many residual dipolar couplings, special care has to be taken to avoid phase distortions if planar mixing steps are used.
KW - Analytical transfer functions
KW - Hartmann-Hahn transfer
KW - Planar mixing
KW - Residual dipolar couplings
UR - http://www.scopus.com/inward/record.url?scp=0141615835&partnerID=8YFLogxK
U2 - 10.1016/S1090-7807(03)00251-9
DO - 10.1016/S1090-7807(03)00251-9
M3 - Article
C2 - 14511598
AN - SCOPUS:0141615835
SN - 1090-7807
VL - 164
SP - 304
EP - 309
JO - Journal of Magnetic Resonance
JF - Journal of Magnetic Resonance
IS - 2
ER -