Photodissociation pathways of gas-phase photoactive yellow protein chromophores
Lutz Lammich1, Jyoti Rajput, Lars H Andersen
1Department of Physics and Astronomy, University of Aarhus, 8000 Aarhus C, Denmark.
Abstract:
The absorption dynamics of two model chromophores of the photoactive yellow protein were studied in gas-phase experiments. Using different time-resolving techniques with an overall sensitivity ranging from seconds down to a few nanoseconds, complex dynamics were revealed for the p -coumaric acid anion, involving both fragmentation and electron detachment as possible photoresponse channels. For the trans-thiophenyl-p-coumarate model, despite its more complex molecular structure, simpler decay dynamics showing only fragmentation were observed.
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