Rapid encoding of T(1) with spectral resolution in n-dimensional relaxation correlations

Nuclear magnetic resonance (NMR) T(1) relaxation times have been encoded in the second dimension of two-dimensional relaxation correlation and exchange experiments using a rapid "double-shot"T(1) pulse sequence. This technique also retains chemical shift information (delta) for short T(2)( *) materials. In this way, a spectral dimension can be incorporated into a T(2)-T(1)-delta correlation without an increase in experimental time compared to the conventional, chemically insensitive T(1)-T(2) correlation. Here, the T(2)-T(1)-delta pulse sequence is used to unambiguously identify oil and water fractions in a permeable rock. A novel T(1)-T(1)-(delta) relaxation exchange measurement is also introduced and used to observe diffusive exchange of water in cellulose fibres.