INHOMOGENEOUS BROADENING OF 2-DIMENSIONAL NMR LINESHAPES

Analytical expressions for inhomogeneously broadened two-dimensional N MR lineshapes are derived. It is shown that, if the inhomogeneous broa dening is dominant, the homogeneous one-dimensional lineshape can be r ecovered by taking a simple cross section through the two-dimensional lineshape. Thus, in favourable circumstances, the homogeneous linewidt h can be extracted without prior knowledge or removal (via spinning, d ecoupling or refocusing) of the inhomogeneous broadening. This result is confirmed experimentally.