Relayed NOESY pulse sequence

The pulse sequence used for relayed NOESY (Figure 5.75A) is identical to the normal NOESY pulse sequence until the third 90° pulse. During the preceding period, magnetization is transferred from the spatially remote spin (Hr) to the neighbor spin (H ) via NOE. The third 90° pulse converts the... 

Figure 1. Pulse sequences of some typical 2D-NMR experiments. COSY = correlation SpectroscopY, DQFCOSY = Double Quantum Filtered COSY, RELAY = RELAYed Magnetization Spectroscopy, and NOESY = Nuclear Overhauser Effect SpectroscopY.

Figure 7.5 Pulses sequences for ID NOESY and ID relayed NOESY experiments, (a) A ID NOESY sequence with full Gaussian pulses is inferior to the ID NOESY sequence (b) with half-Gaussian excitation, (c) A 90° Gaussian pulse in the pulse sequence of 1D relayed NOESYis appropriate for excitation, since antiphase magnetization is required for the first mixing step. (Reprinted from Mag. Reson. Chem. 29, H. Kessler el al, 527, copyright (1991), with permission from John Wiley and Sons Limited, Baffins Lane, Chichester, Sussex P019 lUD, England.)...

Fig. 17. ID RELAY-NOESY spectra of the oligosaccharide 5 acquired using the pulse sequence of fig. 13(d) with the initial polarization transfer from overlapping anomeric protons of two terminal glucoses in 5. (a) Partial H spectrum of 7 at 600 MHz after 8 scans. The following parameters were used to acquire the two original ID RELAY-NOESY spectra (not shown) rsei = 50 ms, tq = 39 ms, A = 9.09 ms, ti = 120 ms, Tr = 64 ms, r, = 400 ms.

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