A FRET-based probe for fluorescence sensing of sulfide/sulfite analytes, using a novel long-wavelength water-soluble 7-hydroxycoumarin as reporter fluorophore

Activity-based NIR fluorescent probes based on the versatile hemicyanine scaffold: design strategy, biomedical applications, and outlook

“…As far as we know, traditional fluorophores including coumarin, naphthalimide, and fluorescein have been widely used to construct functional probes for the detection of important targets in living cells (such as H 2 S, H 2 O 2 , and enzymes) for the past several decades, because their hydroxyl groups can be decorated to control their optical properties. 36–44 Unfortunately, the properties of absorption and emission in the visible region greatly limit their application in in vivo imaging. The NIR fluorescent probes employed for in vivo imaging mostly belong to the cyanine dye family.…”

A FRET based ratiometric fluorescent probe for detection of sulfite in food

“…So far, only a few well-behaved ratiometric probes for sulte have been reported. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] Herein, a new FRET based ratiometric uorescent probe was designed (Scheme 1). A pyrido [1,2-a]benzimidazole uorophore, due to its favorable photophysical properties, was selected as the donor.…”

A ratiometric Al3+ ion probe based on the coumarin-quinoline FRET system

“…Given the high flexibility in the design of FRET probes and the wide choice of fluorophore available, FRET has been widely utilized for the design of ratiometric probes, such as for pH [29] , Fe 3+ [30] , Cu 2+ [31,32] , Hg 2+ [33] , H2S and sulfide/sulfite [34,35] . Notably, so far only a few FRET-based probes for the detection of Al 3+ have been reported [36][37][38] .…”