Radiation-induced transformations of matrix-isolated formic acid: evidence for the HCOOH → HOCO + H channel.
作者： Sergey V. Ryazantsev , Vladimir I. Feldman
DOI: 10.1039/C5CP05446J
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摘要: The effect of X-ray irradiation on the isolated formic acid molecules (HCOOH) in solid noble gas matrices (Xe, Kr, Ar, and Ne) at very low temperatures (6 K) was first studied by FTIR spectroscopy. Carbon oxides (CO CO2) hydrocarboxyl radicals (HOCO) have been detected as principal degradation products. formation HOCO represents a primary dissociation channel for acid, which not reported previously under UV photolysis solids. This reaction can be explained involvement recombination-induced excited states, are populated photolysis. effects matrix absorbed dose product were detail possible mechanisms discussed with particular attention to difference between radiolysis UV-photolysis matrix-isolated acid. results obtained provide new insight into high-energy impact simplest carboxylic implications astrochemical problems, particular, prebiotic evolution interstellar medium.
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