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Structure of the Two-dimensional Relaxation Spectra Seen Within the Eigenmode Perturbation Theory and the Two-site Exchange Model by Dimitri Bytchenkoff; Stéphane Rodts is a Chemistry article available to read on EtoBox.
What is Structure of the Two-dimensional Relaxation Spectra Seen Within the Eigenmode Perturbation Theory and the Two-site Exchange Model about?
The form of the two-dimensional (2D) NMR-relaxation spectra--which allow to study interstitial fluid dynamics in diffusive systems by correlating spin-lattice (T(1)) and spin-spin (T(2)) relaxation times--has given rise to numerous conjectures. Herein we find analytically a number of fundamental structural properties of the spectra: within the eigen-modes formalism, we establish relationships between the signs and intensities of the diagonal and cross-peaks in spectra obtained by various 1 and 2D NMR-relaxation techniques, reveal symmetries of the spectra and uncover interdependence between them. We investigate more specifically a practically important case of porous system that has sets of T(1)- and T(2)-eigenmodes and eigentimes similar to each other by applying the perturbation theory. Furthermore we provide a comparative analysis of the application of the, mathematically more rigorous, eigen-modes formalism and the, rather more phenomenological, first-order two-site exchange model to diffusive systems. Finally we put the results that we could formulate analytically to the test by comparing them with computer-simulations for 2D porous model systems. The structural properties, in
Who reads Structure of the Two-dimensional Relaxation Spectra Seen Within the Eigenmode Perturbation Theory and the Two-site Exchange Model?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Dimitri Bytchenkoff; Stéphane Rodts
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 1090-7807)
- Published
- 2011
- Language
- EN
- Field
- Chemistry (Physical Sciences)