Two dimensional Zeeman nuclear quadrupole resonance spectroscopy

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Abstract
We describe the first application of two‐dimensional spectroscopy to the pure quadrupole regime. One‐ and two‐pulse Zeeman perturbed experiments are outlined, and results of a one‐pulse experiment on the two crystallographically nonequivalent 35Cl sites in 2,4,6‐trichloro‐1,3,5‐triazine (‘‘cyanuric chloride’’) are presented. The results demonstrate that the overlapping Zeeman‐perturbed resonances in a one‐dimensional experiment are fully resolved in a two‐dimensional experiment. The methods appear to have considerable utility for the determination of the quadrupole coupling constant e2qQ/h and asymmetry parameter η for spin I=3/2 nuclei in systems with several closely spaced pure nuclear quadrupole resonance lines.