Research output: Contribution to journal › Article › peer-review
External Random Field Model for Intermolecular Spin Interactions : Accuracy Evaluation for the Coupled Relaxation of Two-Spin Molecules in a Pulse Responsive Solvent. / Khazanovich, Teodor N.; Skrynnikov, Nikolai R.; Skrynnikov, Nikolai R.
In: Journal of the Physical Society of Japan, Vol. 64, No. 2, 02.1995, p. 631-635.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - External Random Field Model for Intermolecular Spin Interactions
T2 - Accuracy Evaluation for the Coupled Relaxation of Two-Spin Molecules in a Pulse Responsive Solvent
AU - Khazanovich, Teodor N.
AU - Skrynnikov, Nikolai R.
AU - Skrynnikov, Nikolai R.
PY - 1995/2
Y1 - 1995/2
N2 - 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 of coupled solvent-solute relaxation (CSSR). It has been found that the parameters of 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.
AB - 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 of coupled solvent-solute relaxation (CSSR). It has been found that the parameters of 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.
KW - coupled spin-lattice relaxation
KW - cross-correlation
KW - intermolecular dipole-dipole interactions
UR - http://www.scopus.com/inward/record.url?scp=84996304114&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.64.631
DO - 10.1143/JPSJ.64.631
M3 - Article
AN - SCOPUS:84996304114
VL - 64
SP - 631
EP - 635
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 2
ER -
ID: 87883910