A Homonuclear Equivalent of the INEPT Experiment. Simplification of Crowded Proton Spectra and Measurement of Unresolved Couplings

Determination of long-range scalar 1H–1H coupling constants responsible for polarization transfer in SABRE

“…Enhanced signals are obtained after a forth-andback coherence transfer between hyperpolarized hydrides and substrate protons. In order to measure the long-range coupling constants, we have followed a J-modulation approach, implemented along the lines of the homonuclear INEPT block [32][33][34][35][36]. Accurate values of the couplings were obtained by fitting the signal integrals in a series of J-modulated spectra to a known transfer function.…”

NMR-Based Chemosensing via p-H2 Hyperpolarization: Application to Natural Extracts

“…24 The 2D pulse scheme here employed ( Figure 1C) differs from the previously presented one 24 in that a "forth-and-back" coherence transfer pathway is followed, with acquisition on the hydrides rather than on aromatic protons of the substrate. After the initial SEPP block, hydrides enhanced magnetization is transferred via homonuclear-INEPT 33 to the analyte protons for t 1 evolution and then back, following a Homonuclear Single Quantum Coherence (HoSQC) pathway. We have recently proposed a similar scheme for the determination of the longrange coupling constants between hydride and substrate protons.…”

In-Phase Double Selective Excitation of Coupled Spin Systems Using Excitation Sculpting

“…The pulse sequence in Fig. 1c incorporates a second biselective double spin echo period, leading to multiplets completely in-phase, as in refocused homonuclear INEPT (15). Quadruple multiselective spin echoes were already used in the ''exside'' experiment, designed for the measurement of heteronuclear long-range coupling constants (16).…”