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Published on: October 9, 2020
Confinement Effects on the Nuclear Spin Isomer Conversion of H2O
Pierre-Alexandre Turgeon1, Jonathan Vermette1, Gil Alexandrowicz2
1Département de Chimie, Université de Sherbrooke , Sherbrooke J1K 2R1, Canada.
Abstract:
The mechanism for interconversion between the nuclear spin isomers (NSI) of H2O remains shrouded in uncertainties. The temperature dependence displayed by NSI interconversion rates for H2O isolated in an argon matrix provides evidence that confinement effects are responsible for the dramatic increase in their kinetics with respect to the gas phase, providing new pathways for o-H2O↔p-H2O conversion in endohedral compounds. This reveals intramolecular aspects of the interconversion mechanism which may improve methodologies for the separation and storage of NSI en route to applications ranging from magnetic resonance spectroscopy and imaging to interpretations of spin temperatures in the interstellar medium.
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