期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 9, 期 32, 页码 4528-4534出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b706094g
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The vibrational dynamics of formic acid dimer is quite regular at low fundamental excitation frequencies, whereas it evolves into a complex and irregular vibrational signature in the OH stretching region. This is evidenced by the first Raman investigation of the jet-cooled formic acid dimer and its three deuterated isotopomers. Subtle isotope effects in the inter-monorner stretching mode, which is directly observed for the first time at 194 cm(-1), find an interpretation based on hydrogen bond weakening due to quantum delocalization of the protons. The reported highfrequency jet spectra should provide essential experimental stepping stones towards a more complete understanding of this planar prototype for strong double hydrogen bonding.
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