Adiabatic z-filtered J-spectroscopy for absorptive homonuclear decoupled spectra

In this article, a J-resolved-type experiment with an adiabatic z-filter element for the selection of inphase magnetization and quadrature detection in the indirect dimension is presented. The phase-sensitive recording scheme allows the distinction of strong coupling artefacts from symmetry relations and the full multiplet obtained by the experiment can be reduced by a simple pattern recognition algorithm. In addition to the J-resolved experiment, a second experiment is introduced that correlates strongly coupled spins. The possibility of homonuclear decoupling using the J-resolved experiment with the pattern recognition algorithm is demonstrated on a number of samples with a detailed description of potential strong coupling artefacts.