Direct and indirect electron emission from the green fluorescent protein chromophore
Y Toker1, D B Rahbek, B Klaerke
1Department of Physics and Astronomy, Aarhus University, Denmark.
Physical Review Letters
|September 26, 2012
Abstract:
Photoelectron spectra of the deprotonated green fluorescent protein chromophore have been measured in the gas phase at several wavelengths within and beyond the S(0)-S(1) photoabsorption band of the molecule. The vertical detachment energy (VDE) was determined to be 2.68 ± 0.1 eV. The data show that the first electronically excited state is bound in the Franck-Condon region, and that electron emission proceeds through an indirect (resonant) electron-emission channel within the corresponding absorption band.
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