Roaming Dynamics and Conformational Memory in Photolysis of Formic Acid at 193 nm Using Time-resolved Fourier-transform Infrared Emission Spectroscopy.

ABSTRACT: In photodissociation of trans-formic acid (HCOOH) at 193 nm, we have observed two molecular channels of CO + H₂O and CO₂ + H₂ by using 1 μs-resolved Fourier-transform infrared emission spectroscopy. With the aid of spectral simulation, the CO spectra are rotationally resolved for each vibrational state (v = 1-8). Each of the resulting vibrational and rotational population distributions is characteristic of two Boltzmann profiles with different temperatures, originating from either transition state pathway or OH-roaming to form the same CO + H₂O products. The H₂O roaming co-product is also spectrally simulated to understand the interplay with the CO product in the internal energy partitioning. Accordingly, this work has evaluated the in

SUBMITTER: Tso CJ 

PROVIDER: S-EPMC7075954 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature