Confinement effects on the nuclear spin isomer conversion of H$_2$O
Abstract
The mechanism for interconversion between the nuclear spin isomers (NSI) of HO remains shrouded in uncertainties. The temperature dependence displayed by NSI interconversion rates for HO 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-HO p-HO 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 in nuclear magnetic resonance spectroscopy and imaging. It may also improve astronomers' ability to use their relative abundance in the interstellar medium as proxies, thereby providing a valuable "astronomical clock".
Cite
@article{arxiv.1611.08453,
title = {Confinement effects on the nuclear spin isomer conversion of H$_2$O},
author = {Pierre-Alexandre Turgeon and Jonathan Vermette and Gil Alexandrowicz and Yoann Peperstraete and Laurent Philippe and Jean-Hugues Fillion and Xavier Michaut and Patrick Ayotte},
journal= {arXiv preprint arXiv:1611.08453},
year = {2017}
}