Slice Selective Absorption-Mode J-Resolved NMR Spectroscopy

We have demonstrated a broadband 1H-1H J-Resolved spectrum with a greatly reduced dispersive contribution using the concept of slice selection. We show that slice selective excitation, t1 encoding, storage, and detection of the in-phase absorptive signals can be executed, while a gradient-based suppression of the dispersive antiphase signals can be performed during the storage period. Analogous to Zangger-Sterk (ZS) broadband homo-decoupling, the fresh magnetization from neighboring slices can be accessed in different scans by frequency shifting of the slice selective pulses without a recycle delay-an elegant aspect of the ZS pulse element. This allows faster signal averaging, improving sensitivity which depends on the T1 relaxation time of the signals. For the data kindly consult Fig 3, 5, and 7 othis J. Magn. Reson. paper