C13Double-Resonance Fourier-Transform Spectroscopy in Solids

A high-resolution double-resonance scheme is described which enables measurements of the chemical-shift structure and intrinsic line shape in low-abundance spin species in solids. Expressions for the decay function and the line-shape function are formulated. As a theoretical test of the range of validity of the scheme, simulated signal decays and line shapes are regenerated using a Gaussian-decay input function and fixed parameters covering a range common to ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ in natural abundance. As examples of its application the method is used to study the 1.108% naturally abundant ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ in a number of organic solids. The preliminary results presented are encouraging and indicate the presence of chemical-shift splittings and anisotropies.