Lanthanide-induced Curie-spin relaxation

It is difficult to use lanthanide-induced relaxation data to obtain accurate distances between various nuclei and the lanthanide ion. If it can be shown that the dipolar contribution to either Tj or Tj is dominant, then the difficulty is related to a means to determine accurate values of the electron-spin relaxation times. If the Curie contribution can be shown to dominate, then the problem is measuring accurate correlation times. However, the major difficulty is that the relative dipolar and Curie contributions to T] and Tj are generally not known. However, since both the Curie and dipolar contributions to Tj" and dependency on the R " -nucleus distance, ratios of Ti or... 

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