ИСТИНА

Photoinduced electronic and nuclear dynamics are often strongly coupled in the excited-state decay channels of biomolecular systems. Internal conversion and light-induced electron transfer can be modulated by vibrational excitation, suggesting a way for controlling molecular functions. By using time-resolved action absorption spectroscopy of cryogenically cooled molecular ions combined with high-level ab initio calculations, we provide direct evidence of such control through achieving an unprecedented vibrational resolution in the photoresponse of the deprotonated Green Fluorescent Protein (GFP) chromophore – a key molecular unit in bioimaging of living cells.