Evidence of quantum correlations in the H/D-transfer dynamics in the hydrogen bonds in partially deuterated benzoic acid crystals

A precise investigation of spin—lattice relaxation rates for protons and deuterons of partially deuterated benzoic acid crystals showed a remarkable quenching of the transfer rate of an HD pair in hydrogen-bonded dimeric units of carboxyl groups with increasing concentration of D in the surrounding...

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Bibliographic Details
Published in:Chemical physics letters 1992-10, Vol.198 (3), p.316-320
Main Authors: Takeda, Sadamu, Tsuzumitani, Akihiko, Chatzidimitriou-Dreismann, C.A.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Nuclear magnetic resonance and relaxation
Physics
Relaxation effects
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Summary:A precise investigation of spin—lattice relaxation rates for protons and deuterons of partially deuterated benzoic acid crystals showed a remarkable quenching of the transfer rate of an HD pair in hydrogen-bonded dimeric units of carboxyl groups with increasing concentration of D in the surrounding hydrogen bonds. A similar effect was also observed for partially deuterated crystals of acetylenedicarboxylic acid. This finding supports recent theoretical predictions of thermally activated protonic quantum correlation in condensed matter and proposes a new mechanism for the proton transfer in hydrogen bonds in condensed matter.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(92)85058-I