Study of the Position of the Conjugated Substitute Influence on the Optical Properties of the Kaede Protein Chromophore Derivatives

We report novel derivatives of a chromophore of the fluorescent protein Kaede, (Z)-2-(4-methoxybenzylidene)-6/8-phenylimidazo[1,2-a]pyridine-3(2H)-ones. The introduction of phenyl substituent in the 6- and 8-position of the imidazopyridinone fragment does not lead to a shift in absorption and emission spectra.

Automated summary

Novel derivatives of the fluorescent protein Kaede's chromophore, (Z)-2-(4-methoxybenzylidene)-6/8-phenylimidazo[1,2-a]pyridine-3(2H)-ones, were reported. The introduction of a phenyl substituent at the 6th and 8th position of the imidazopyridinone fragment did not result in a shift in absorption and emission spectra.