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Photo-induced proton-coupled electron transfer and dissociation of isolated flavin adenine dinucleotide mono-anions
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 1
2017 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 19, no 38, 25829-25833 p.Article in journal (Refereed) Published
Abstract [en]

The intrinsic optical absorption spectrum and photo-dissociation pathways of flavin adenine dinucleotide (FAD) mono-anions isolated in vacuo are probed using photo-induced dissociation (PID) action spectroscopy. The main photo-products are lumichrome and formylmethylflavin. Evidence is presented that the dissociation pathway leading to these products is non-statistical i.e. occurs during the excited state lifetime. This suggests that the stacking of the adenine and alloxazine chromophores, which enables ultra-fast quenching of the flavin excited state by photo-induced electron transfer in aqueous solution, is inhibited in vacuo. These results provide firm experimental confirmation that lumichrome formation from flavins proceeds via photo-induced, intra-molecular proton-coupled electron transfer.

Place, publisher, year, edition, pages
2017. Vol. 19, no 38, 25829-25833 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-149010DOI: 10.1039/c7cp04068gISI: 000412275200002PubMedID: 28745349OAI: oai:DiVA.org:su-149010DiVA: diva2:1159356
Available from: 2017-11-22 Created: 2017-11-22 Last updated: 2017-11-22Bibliographically approved

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