Non-statistical fragmentation in photo-activated flavin mononucleotide anions

Autor:	Mark H. Stockett, Steen Brøndsted Nielsen, Eleanor K. Ashworth, L Giacomozzi, James N. Bull, Christina Kjær
Rok vydání:	2021
Předmět:	Chemistry General Physics and Astronomy Flavin mononucleotide Flavin group Photochemistry Molecular electronic transition Dissociation (chemistry) Ion chemistry.chemical_compound Fragmentation (mass spectrometry) Yield (chemistry) Physical and Theoretical Chemistry Nuclear Experiment Spectroscopy
Zdroj:	Giacomozzi, L, Kjær, C, Brøndsted Nielsen, S, Ashworth, E K, Bull, J N & Stockett, M H 2021, ' Non-statistical fragmentation in photo-activated flavin mononucleotide anions ', Journal of Chemical Physics, vol. 155, no. 4, 044305 . https://doi.org/10.1063/5.0056415
ISSN:	1089-7690
Popis:	The spectroscopy and photo-induced dissociation of flavin mononucleotide anions in vacuo are investigated over the 300-500 nm wavelength range. Comparison of the dependence of fragment ion yields as a function of deposited photon energy with calculated dissociation energies and collision-induced dissociation measurements performed under single-collision conditions suggests that a substantial fraction of photo-activated ions decompose through non-statistical fragmentation pathways. Among these pathways is the dominant photo-induced fragmentation channel, the loss of a fragment identified as formylmethylflavin. The fragment ion specific action spectra reveal electronic transition energies close to those for flavins in solution and previously published gas-phase measurements, although the photo-fragment yield upon excitation of the S2 ← S0 transition appears to be suppressed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b79f914b5a96919bd98657bedc3522f https://pubmed.ncbi.nlm.nih.gov/34340366 Zobrazit plný text záznamu