Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 12, Issue 26, Pages 7138-7147Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b926658e
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Funding
- Academy of Finland
- Emil Aaltonen foundation
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Raman spectroscopy combined with the matrix isolation technique was employed to study the 193-nm photodecomposition products of formic acid in an argon matrix. The Raman-active fundamentals belonging to the CO2 + H-2 and CO + H2O photoproducts were assigned. Also, bands due to Fermi resonance between the stretching vibration (nu(1)) and the overtone of the bending mode (2 nu(2)) of CO2 were identified. Both ortho-and para-H-2 molecules were identified from their rotational lines S-0(1) and S-0(0), respectively. These bands appeared upon matrix annealing as well as after prolonged photolysis. Additionally, photolysis of FA dimers produces oxalic acid and its secondary photoproducts, CO2 + CO + H2O. All experimental studies were supported by ab initio calculations.
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