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Durham University

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Publication details for Prof. Jan R.R. Verlet

West, C.W., Hudson, A.S., Cobb, S.L. & Verlet, J.R.R. (2013). Communication: Autodetachment versus internal conversion from the S1 state of the isolated GFP chromophore anion. The Journal of Chemical Physics 139(7): 071104.

Author(s) from Durham


The anionic form of p-hydroxybenzylidene-2,3-dimethylimidazolinone (HBDI) has been extensively employed as a model of the chromophore of the green fluorescence protein. The bright S1 excited state HBDI− has a measured lifetime of 1.4 ps in the gas-phase and is dominated by two non-radiative decay mechanisms: internal conversion and autodetachment into the neutral continuum. Here, time-resolved photoelectron spectroscopy has been used to determine the yields of these two channels from which the lifetime for autodetachment was found to be ∼30 ps.