Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal)

Sergey Zagorodskikh; John H D Eland; Vitali Zhaunerchyk; Melanie Mucke; Richard J Squibb; Per Linusson; Raimund Feifel

doi:10.1063/1.4962823

Mechanisms of site-specific photochemistry following core-shell ionization of chemically inequivalent carbon atoms in acetaldehyde (ethanal)

J Chem Phys. 2016 Sep 28;145(12):124302. doi: 10.1063/1.4962823.

Authors

Sergey Zagorodskikh¹, John H D Eland², Vitali Zhaunerchyk¹, Melanie Mucke¹, Richard J Squibb¹, Per Linusson³, Raimund Feifel¹

Affiliations

¹ Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden.
² Department of Physics, University of Gothenburg, Origovägen 6B, SE-412 96 Gothenburg, Sweden.
³ Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm, Sweden.

PMID: 27782647
DOI: 10.1063/1.4962823

Abstract

Site-specific fragmentation upon 1s photoionisation of acetaldehyde has been studied using synchrotron radiation and a multi-electron-ion coincidence technique based on a magnetic bottle. Experimental evidence is presented that bond rupture occurs with highest probability in the vicinity of the initial charge localisation and possible mechanisms are discussed. We find that a significant contribution to site-specific photochemistry is made by different fragmentation patterns of individual quantum states populated at identical ionisation energies.