Isomer-specific vibronic structure of the 9-, 1-, and 2-anthracenyl radicals via slow photoelectron velocity-map imaging

Proceedings of the National Academy of Sciences of the United States of America
Marissa L WeichmanDaniel M Neumark

Abstract

Polycyclic aromatic hydrocarbons, in various charge and protonation states, are key compounds relevant to combustion chemistry and astrochemistry. Here, we probe the vibrational and electronic spectroscopy of gas-phase 9-, 1-, and 2-anthracenyl radicals (C14H9) by photodetachment of the corresponding cryogenically cooled anions via slow photoelectron velocity-map imaging (cryo-SEVI). The use of a newly designed velocity-map imaging lens in combination with ion cooling yields photoelectron spectra with <2 cm(-1) resolution. Isomer selection of the anions is achieved using gas-phase synthesis techniques, resulting in observation and interpretation of detailed vibronic structure of the ground and lowest excited states for the three anthracenyl radical isomers. The ground-state bands yield electron affinities and vibrational frequencies for several Franck-Condon active modes of the 9-, 1-, and 2-anthracenyl radicals; term energies of the first excited states of these species are also measured. Spectra are interpreted through comparison with ab initio quantum chemistry calculations, Franck-Condon simulations, and calculations of threshold photodetachment cross sections and anisotropies. Experimental measures of the subtle difference...Continue Reading

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Citations

Jan 31, 2016·Proceedings of the National Academy of Sciences of the United States of America·Paul Gabrielsen
Aug 9, 2016·The Journal of Chemical Physics·Marissa L WeichmanDaniel M Neumark
Sep 3, 2016·The Journal of Chemical Physics·Xiaolin Chen, Chuangang Ning
Dec 13, 2016·Journal of the American Chemical Society·Jessalyn A DeVineDaniel M Neumark
Feb 6, 2018·Annual Review of Physical Chemistry·Marissa L Weichman, Daniel M Neumark
Jun 30, 2018·Chemical Society Reviews·Tao WangDaniel M Neumark
May 1, 2019·Faraday Discussions·Jessalyn A DeVineDaniel M Neumark
Feb 3, 2018·The Journal of Chemical Physics·Joseph CzeknerLai-Sheng Wang
Oct 21, 2017·Science·Jessalyn A DeVineDaniel M Neumark
Jul 10, 2017·The Journal of Chemical Physics·Jessalyn A DeVineDaniel M Neumark
Jun 17, 2018·The Journal of Chemical Physics·Jessalyn A DeVineDaniel M Neumark
Sep 10, 2017·The Journal of Chemical Physics·Steven J KregelEtienne Garand
Nov 10, 2018·The Journal of Chemical Physics·Mark C BabinDaniel M Neumark
Oct 8, 2018·The Journal of Chemical Physics·Rulin TangChuangang Ning
Jun 25, 2018·The Journal of Chemical Physics·Steven J KregelEtienne Garand
May 28, 2021·The Journal of Physical Chemistry. a·Cate S Anstöter, Jan R R Verlet
Aug 10, 2021·The Journal of Physical Chemistry. a·Cole R Sagan, Etienne Garand
Mar 9, 2019·The Journal of Physical Chemistry. a·Joanne L WoodhouseHelen H Fielding
Aug 27, 2021·The Journal of Physical Chemistry. a·Martin DeWittDaniel M Neumark

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