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

✍ Scribed by Sadamu Takeda; Akihiko Tsuzumitani; C.A. Chatzidimitriou-Dreismann

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
473 KB
Volume
198
Category
Article
ISSN
0009-2614

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✦ Synopsis

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.

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