The NOESY sequence (NOESY stand for: Nuclear Over Hauser Enhancement Spectroscopy)
It introduces the crossed relaxation
which governs the
Over Hauser effect[1]. The NOESY spectroscopy is rather limited to the determination of the notion of crossed homonuclear relaxation.
The pulse sequence scheme is given Figure 22.
Fig. 22 : The NOESY pulse sequence
The spectrum 8 is a COSY 45° of the phenanthro-benzofurane (PBF) (Fig.30). The spectrum 9 is the corresponding NOESY spectrum We observe an additional correlation spot between the proton which is at 8.8 ppm and the proton which has a chemical shift of 8.6 ppm. This spot is termed A, it means a dipolar interaction between two protons
and
.
Fig. 30 : The phenanthro-benzofurane (PBF)
Spectrum 8: COSY spectrum of PBF
Spectrum 9: NOESY spectrum of PBF
