Artigo Revisado por pares

High-energy conformer of formic acid in solid neon: Giant difference between the proton tunneling rates of cis monomer and trans-cis dimer

2007; American Institute of Physics; Volume: 126; Issue: 24 Linguagem: Inglês

10.1063/1.2752152

ISSN

1520-9032

Autores

Kseniya Marushkevich, Leonid Khriachtchev, Markku Räsänen,

Tópico(s)

Quantum, superfluid, helium dynamics

Resumo

We study the conformational reorganization of formic acid (FA) in solid neon and report the higher-energy cis-FA monomer and one form of the trans-cis FA dimers. They were prepared by selective vibrational excitation of the trans-FA monomer and trans-trans dimer. The proton tunneling decay of cis-FA monomer is surprisingly very fast in solid neon, two orders of magnitude faster than in solid argon. It was also found that the stability of the trans-cis dimer against proton tunneling is enormously enhanced in solid neon compared to the monomer (by a factor of ∼300). These results are discussed in terms of matrix solvation and hydrogen bonding.

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