Laser spectroscopic and quantum chemical studies of the lowest excited states of formic acid

A fluorescence excitation spectrum of formic acid monomer (HCOOH) has been recorded in the 268-257-nm region and has been attributed to an n {yields} {pi}{sup *} electron promotion in the anti conformer. The S{sub 0} {l arrow} S{sub 1} electronic origins of the HCOOH/HCOOD/DCOOH/DCOOD isotopomers we...

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Veröffentlicht in:	Journal of physical chemistry (1952) 1990-03, Vol.94 (6), p.2290-2294
Hauptverfasser:	Ioannoni, F, Moule, D. C, Clouthier, D. J
Format:	Artikel
Sprache:	eng
Schlagworte:	Atomic and molecular physics CARBOXYLIC ACIDS DATA DATA ANALYSIS ELECTROMAGNETIC RADIATION EMISSION SPECTROSCOPY ENERGY LEVELS Exact sciences and technology EXCITED STATES EXPERIMENTAL DATA Fluorescence and phosphorescence radiationless transitions, quenching (intersystem crossing, internal conversion) FLUORESCENCE SPECTROSCOPY FORMIC ACID INFORMATION INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY LASER RADIATION MEASURING INSTRUMENTS MEASURING METHODS Molecular properties and interactions with photons MONOCARBOXYLIC ACIDS NUMERICAL DATA ORGANIC ACIDS ORGANIC COMPOUNDS Physics RADIATIONS SPECTROSCOPY 400500 > Photochemistry
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Zusammenfassung:	A fluorescence excitation spectrum of formic acid monomer (HCOOH) has been recorded in the 268-257-nm region and has been attributed to an n {yields} {pi}{sup *} electron promotion in the anti conformer. The S{sub 0} {l arrow} S{sub 1} electronic origins of the HCOOH/HCOOD/DCOOH/DCOOD isotopomers were assigned to weak bands observed at 37,431.5/37,461.5/37,445.5/37,479.3 cm{sup {minus}1}. Four vibrational modes, {nu}{sub 3}(C{double bond}O), {nu}{sub 7}(O-C{double bond}O), {nu}{sub 8}(C-H{sub ald}), and {nu}{sub 9}(O-H{sub hyd}), were observed in the spectrum.
ISSN:	0022-3654 1541-5740
DOI:	10.1021/j100369a018