Theory of proton NMR with deuteron decoupling in nematic liquid crystalline solvents

Abstract

The theory required to interpret proton NMR with deuteron decoupling in liquid crystalline solvents is developed. The Bloom and Shoolery analysis of double resonanceexperiments, in which the spectra of a pair of nonidentical nuclei with isotropic coupling are interpreted in terms of quantization in an effective field in a rotating coordinate system, is extended to systems having anisotropic interactions such as direct dipolar and quadrupole couplings. Applications are made to model systems of one‐proton‐one‐deuteron and two‐protons‐two‐deuterons to facilitate interpretation of recent decoupling experiments, which are described in a companion paper, on partially deuterated cyclohexane in a nematic solvent.