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Updated: May 8, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Ultraviolet photodissociation dynamics of the o-pyridyl radical
Michael Lucas1, Jasmine Minor, Jingsong Zhang
1Department of Chemistry, University of California at Riverside , Riverside, California 92521, United States.
Abstract:
Ultraviolet (UV) photodissociation dynamics of jet-cooled o-pyridyl radical (o-C5H4N) was studied in the photolysis region 224-246 nm using the high-n Rydberg atom time-of-flight (HRTOF) technique. The o-pyridyl radicals were produced from 193 nm photolysis of 2-chloropyridine and 2-bromopyridine precursors. The H-atom photofragment yield (PFY) spectrum contains a broad peak in this wavelength region and reveals the UV absorption feature of o-pyridyl for the first time. The translational energy distributions of the H-atom loss product channel, P(ET)'s, peak at ∼7 kcal/mol, and the fraction of average translational energy in the total excess energy,
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