Hannover 2020 – scientific programme

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MO: Fachverband Molekülphysik

MO 5: MO Poster 1

MO 5.8: Poster

Monday, March 9, 2020, 17:00–19:00, Empore Lichthof

Study of the photophysics and photochemistry of the phenol-ammonia complex — •Stefan Fuchs and Bernhard Dick — Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Germany

Excited-state hydrogen transfer (ESHT) reactions provide photostability of biomolecules and are applied for the photoprotection of compounds (e.g. plastics) exposed to sunlight. Mechanistic proposals include hydrogen transfer and electron coupled proton transfer (ECPT). Clusters of phenol with ammonia have been used as model systems for the study of the mechanism. Previous studies on the dissociation of such clusters into a neutral phenoxy radical and the neutral hydrated ammonia cluster have considered clusters containing 5 ammonia molecules [1,2]. We use time-of-flight mass spectroscopy in combination with quantum chemical calculations which yields data on the phenol-ammonia(1) cluster.

[1] M. Miyazaki, R. Ohara, K. Daigoku, K. Hashimoto, J. R. Woodward, C. Dedonder, Ch. Jouvet, M. Fujii, Angew. Chem. Int. Ed. 2015, 54, 15089–15093.

[2] M. Miyazaki, R. Ohara, C. Dedonder, Ch. Jouvet, M. Fujii Chem. Eur. J. 2018, 24, 881 – 890.