Determination of the Rotational Correlation Time of Water by Proton NMR Relaxation in H217O and Some Related Results

Autor:	J. C. Leyte, J. Schriever, D. Lankhorst
Rok vydání:	1982
Předmět:	Deuterium Proton Chemistry General Chemical Engineering Intermolecular force Kinetic isotope effect Quadrupole Analytical chemistry Proton NMR Relaxation (physics) Physics::Chemical Physics Rotational correlation time
Zdroj:	Berichte der Bunsengesellschaft für physikalische Chemie. 86:215-221
ISSN:	0005-9021
DOI:	10.1002/bbpc.19820860308
Popis:	Analysis of the 1H-17O dipolar contribution to the proton longitudinal relaxation rate in 17O-enriched water yields a correlation time for re-orientation of the O–H vector τrOH = (1.71 ± 0.07) ps in H2O at 25 °C. This result is insensitive to uncertainties in the calculated intermolecular relaxation contribution. From 1H, D, and 17O relaxation rates in H2O/D2O mixtures deuterium isotope effects on the correlation times were estimated. The quadrupole coupling constants of D and 17O in liquid water were determined.
Databáze:	OpenAIRE
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