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Quadrupolar ion NMR splittings and self-diffusion of {sup 7}Li{sup +} (I = 3/2) ions have been studied in macroscopically oriented Li-(B)DNA fibers. The {sup 7}Li splittings were measured with a double quantum filter pulse sequence, followed by subsequent fitting of the out-of-phase doublet spectrum. Lithium(I) self-diffusion was measured with the pulsed field gradient NMR spin-echo method. Diffusion was found to be restricted in both the parallel and perpendicular direction with respect to the fiber axis.

133Cs NMR spectra of macroscopically oriented CsDNA are reported. The quadrupolar splitting measured as a function of the orientation of the sample in the magnetic field is in agreement with the predictions for an uniaxial system. The order-selective multiple-quantum NMR spectra for the I = 7 2 133 Cs nucleus are also reported.