External Random Field Model for Intermolecular Spin Interactions: Accuracy Evaluation for the Coupled Relaxation of Two-Spin Molecules in a Pulse Responsive Solvent.

DOI Web Site Web Site BIBCODE 25 References

Bibliographic Information

Other Title
  • External Random Field Model for Intermo

Search this article

Abstract

The errors that may arise from the use of the external random field (ERF) approximation in the spin relaxation theory are estimated for the case of a binary solution. The experiments by M. Ishiwata and Y. Ishii (J. Phys. Soc. Jpn. 60 (1991) 1379, ibid. 60 (1991) 1743) have been analyzed. Coupled spin-lattice relaxation of solute molecules has been measured in the experiments where the solvent spin system was exposed to the effect of nonselective pulses. Going beyond the ERF model we assume that the behavior of a solvent spin system can be characterized by a single polarization. This approach involves the consideration ofcoupled solvent-solute relaxation (CSSR). It has been found that the parametersof molecular motion, extracted with the CSSR approach, differ noticeably from those obtained within the scope of the ERF model. We conclude that if the solvent spin system is perturbed during the experiment and its spin-lattice relaxation time is not too short, the CSSR approach should be recommended for quantitative study of the motion of solute molecules.

Journal

References(25)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top