Cross-correlated chemical shift modulation (CSM). Differences of the relaxation rates
of ZQ and DQ coherences involving two different nuclei. Some references:
01JACS4810
,
01CPC41
,
00JB33-18
,
04JB173-28
,
04JB213-28
,
04JB263-28
.
Application of a CPMG sequence to two-spin NyHy coherence involving a backbone amide proton and the neighboring nitrogen (
04JACS1314
). The difference of the decay rates of DQC and ZQC is given by the sum of CSA-CSA and CSM-CSM cross-correlation effects as well as additional DD-DD contributions due to couplings to neighboring 13C nuclei.
