Chapter 3 1D Double Quantum Filter NMR Studies

Abstract

NMR spectra are rich in information content, but are often crowded severely, except for the simplest systems. A generic approach to address this problem is spectral simplification by suitable editing. Editing procedures are in turn most frequently rooted in the manipulation of spins by means of their couplings, be they scalar, dipolar, or quadrupolar. In this connection, creation of a double quantum state to filter spectra has proven to be an especially fruitful strategy. In this contribution, we discuss the principles, implementation, and typical applications of one-dimensional double quantum filter NMR experiments in solution state, solid state, and spatially resolved NMR.