Measurement of heteronuclear dipolar interactions between quadrupolar and spin-1/2 nuclei in solids by multiple-quantum REDOR NMR

A method combining multiple-quantum magic angle spinning (MQMAS) with S-observe, I-dephase rotational echo double resonance (REDOR), is presented. The MQ-REDOR technique was used in (super19)F-(super27)A1 spin pairs within a fluorinated aluminophosphate sample. It would be useful for spectral editing and in the study of internuclear distances in complex systems, that involve quadrupolar spins in conditions of high resolution.