FREQUENCY-SELECTIVE EXCITATION IN MULTIPLE-QUANTUM NMR

Orientation of molecules in liquid-crystalline solvents is a powerful tool for the study of molecular structure and orientation. However, th e NMR spectra arising from even relatively small molecules oriented in such solvents can be so complex as to defy analysis. There is demonst rated here a frequency-selective modification of the basic multiple-qu antum NMR experiment which is capable of measuring otherwise difficult -to-obtain information in favorable spin systems. (C) 1995 Academic Pr ess, Inc.