Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Spin-echo double resonance SEDOR

Dipole—dipole (heteronuclear) Af (hetero) Spin-echo double resonance (SEDOR) ... [Pg.464]

The Slichter group (see Section IV.F) uses the following terminology the spin echo double resonance (SEDOR) fraction (Sf) for a pulse... [Pg.25]

The Spin Echo Double Resonance (SEDOR), REDOR and TEDOR experiments are all multiple resonance experiments that exploit heteronuclear dipolar coupling. Qualitative information regarding the proximity of spins I and S, and even quantitative information regarding the I-S distance can be derived. Examples of these approaches applied to materials will be given in later Chapters. Their application to specific areas such as aluminosilicates has been reviewed (Ba et al. 2000). [Pg.178]

Slichter s spin echo approach is a variation on the spin echo double resonance (SEDOR) experiment originally proposed by Hahn I03. To see how this experiment works, consider the spin echo sequences shown in Fig 53. The first case, Fig 53a, describes Hahn s original echo experiment 103. In a hetero-nuclear case (always observing the rare spin) any heteronuclear dipolar interactions (along with the chemical shift and inhomogeneous line broadening processes) will be refocused as a result of this sequence. The second example. Fig 53b, is Hahn s SEDOR experiment (74). Here, the heteronuclear dipole-dipole interaction is not refocused because of the application of the second tt pulse to... [Pg.300]

See other pages where Spin-echo double resonance SEDOR is mentioned: [Pg.258]    [Pg.387]    [Pg.212]    [Pg.207]    [Pg.638]    [Pg.195]    [Pg.202]    [Pg.98]    [Pg.271]    [Pg.312]    [Pg.382]    [Pg.76]    [Pg.57]    [Pg.30]    [Pg.233]    [Pg.727]    [Pg.1168]    [Pg.1176]   
See also in sourсe #XX -- [ Pg.38 , Pg.76 , Pg.83 ]



SEARCH



Double resonance

© 2024 chempedia.info