Separation of Water into Its Ortho and Para Isomers

@article{Tikhonov2002SeparationOW,
  title={Separation of Water into Its Ortho and Para Isomers},
  author={Vladimir I Tikhonov and Alexander A. Volkov},
  journal={Science},
  year={2002},
  volume={296},
  pages={2363 - 2363}
}
Polyatomic molecules can exist as nuclear spin isomers. For example, the ortho and para hydrogen spin isomers are characterized by different values of specific heat, boiling point, heat of vapor formation, and so forth ([1][1]). Hydrogen has been the only substance whose spin modifications are well 
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Deviations from the normal ortho/para ratio for water (3 : 1) in the vapor phase in dynamic sorption
Deviations of the ortho/para ratio from its normal value (3: 1) were observed by spectral selective detection of ortho and para water molecules when water vapor passed through a column with a
Observation of different reactivities of para and ortho-water towards trapped diazenylium ions
TLDR
Water molecules exist as two distinct nuclear-spin isomers denoted ortho and para, and these two isomers are separate in the gas phase to show that they exhibit different reactivities in a prototypical proton-transfer reaction.
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Can ortho-para transitions for water be observed?
TLDR
Ab initio calculations show that the hyperfine nuclear spin-rotational coupling constants are about 30 kHz, and these constants are used to explore the whole vibration-rotation spectrum with special emphasis on the coupling between nearby levels.
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References

SHOWING 1-4 OF 4 REFERENCES
NUCLEAR MAGNETIC RESONANCE STUDY OF THE PROTON TRANSFER IN WATER
Measurements of the nuclear relaxation in water are reported. The transverse relaxation rate (1/T2) of the proton resonance is pH dependent. The effect is shown to be due to a spin‐spin splitting of
The Principles of Nuclear Magnetism
The Spectrum of Comet Hale-Bopp (C/1995 O1) Observed with the Infrared Space Observatory at 2.9 Astronomical Units from the Sun
TLDR
Several broad emission features observed in the 7- to 45-micrometer region suggest the presence of silicates, particularly magnesium-rich crystalline olivine, similar to those observed inThe dust envelopes of Vega-type stars.