Abstract
The newly designed green fluorescent protein (GFP) chromophore analog, bar-DAIN, which has a 2-biaryl-conjugated 5-(diphenylmethylene)imidazolinone structure, was effectively synthesized using the Suzuki coupling reaction. Bar-DAIN showed environment-dependent fluorescence behavior; for example, the thienyl analog emitted yellow-green fluorescence in viscous solution (λem: 535 nm), yellow-orange fluorescence in suspension (λem: 551 nm), and cyan fluorescence in a powder state (λem: 497 nm) although it showed almost no emission in common solvents such as dichloromethane. The dynamic discoloration of the fluorescence was observed by changing environmental conditions from suspension to viscous.
Published Version
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