High-energy conformer of formic acid in solid hydrogen: conformational change promoted by host excitation

Literature Information

Publication Date 2007-09-27
DOI 10.1039/B712647F
Impact Factor 3.676
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Abstract

Conformers of formic acid (FA) are studied by IR spectroscopy in solid hydrogen. The higher-energy cis-FA conformer is prepared by vibrational excitation of the ground-state trans-FA conformer. The quantum yield of the trans to cis conformational process in solid hydrogen appears about two orders of magnitude smaller than in solid argon, which is explained by efficient coupling of the vibrationally excited trans form with the host vibrations deactivating the conformational change. The trans to cis conformational process is efficiently promoted by excitation of the hydrogen-matrix rovibrational transitions (host excitation), which confirms the strong coupling between vibrations of the host and embedded molecule. These results demonstrate a unique process of conformational reorganization mediated by vibrational excitation of the host. The tunneling decay of the cis-FA monomer in solid hydrogen is found to be 4 times faster than in solid argon but 30 times slower than in solid neon, and this is discussed in terms of the matrix solvation effect.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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