Photoisomerization of beta-Ionone Protonated Schiff Base in the Gas Phase
Neville JA Coughlan, Claire M Wallace, Brian D Adamson, Evan J Bieske
JOURNAL OF PHYSICAL CHEMISTRY A | AMER CHEMICAL SOC | Published : 2016
The photoisomerization of β-ionone protonated Schiff base (BIPSB) is investigated in the gas phase by irradiating mobility-selected ions in a tandem ion mobility spectrometer with tunable radiation. Four distinguishable isomers are produced by electrospray ionization whose structures are deduced from their collision cross sections and photoisomerization behavior along with density functional theory calculations. They include two geometric isomers of BIPSB with trans or cis configurations about the polyene chain's terminal C═N double bond, a bicyclic structure formed through electrocyclization of the polyene chain, and a Z-retro-γ-ionone isomer. Although trans-BIPSB and 9-cis-BIPSB have simil..View full abstract
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Awarded by Australian Research Council
This research was supported under the Australian Research Council's Discovery Project funding scheme (Project Numbers DP110100312 and DP120100100).