7 fluoro 2,1,3 benzoxadiazole 4 sulfonate (ammonium salt)

7-Fluoro-2,1,3-benzoxadiazole-4-sulfonate (SBD-F) is a thiol-reactive fluorogenic probe.1It has been used to quantify the levels of homocysteine, cysteine, and cysteamine in human plasma.2SBD-F displays excitation emission maxima of 380 515 nm, respectively.1 1.Imai, K., Toyo'oka, T., and Watanabe, Y.A novel fluorogenic reagent for thiols: Ammonium 7-fluorobenzo-2-oxa-1,3-diazole-4-sulfonateAnal. Biochem.128(2)471-473(1983) 2.Ichinose, S., Nakamura, M., Maeda, M., et al.A validated HPLC-fluorescence method with a semi-micro column for routine determination of homocysteine, cysteine and cysteamine, and the relation between the thiol derivatives in normal human plasmaBiomed. Chromatogr.23(9)935-939(2009)

STY-BODIPY is a styrene-conjugated fluorogenic probe for radical-trapping antioxidant (RTA) activity.1 Co-autoxidation of the STY-BODIPY signal carrier and a hydrocarbon co-substrate can be quantified by monitoring the loss of absorbance at 571 nm. STY-BODIPY has been used to measure the activity of RTAs, as well as the kinetics and stoichiometry of RTA reactions in cell-free assays.1,2,3References1. Haidasz, E.A., Van Kessel, A.T.M., and Pratt, D.A. A continuous visible light spectrophotometric approach to accurately determine the reactivity of radical-trapping antioxidants. J. Org. Chem. 81(3), 737-744 (2016).2. Shah, R., Shchepinov, M.S., and Pratt, D.A. Resolving the role of lipoxygenases in the initiation and execution of ferroptosis. ACS Cent. Sci. 4(3), 387-396 (2018).3. Chauvin, J.-P.R., Haidasz, E.A., Griesser, M., et al. Polysulfide-1-oxides react with peroxyl radicals as quickly as hindered phenolic antioxidants and do so by a surprising concerted homolytic substitution. Chem. Sci. 7(10), 6347-6356 (2016). STY-BODIPY is a styrene-conjugated fluorogenic probe for radical-trapping antioxidant (RTA) activity.1 Co-autoxidation of the STY-BODIPY signal carrier and a hydrocarbon co-substrate can be quantified by monitoring the loss of absorbance at 571 nm. STY-BODIPY has been used to measure the activity of RTAs, as well as the kinetics and stoichiometry of RTA reactions in cell-free assays.1,2,3 References1. Haidasz, E.A., Van Kessel, A.T.M., and Pratt, D.A. A continuous visible light spectrophotometric approach to accurately determine the reactivity of radical-trapping antioxidants. J. Org. Chem. 81(3), 737-744 (2016).2. Shah, R., Shchepinov, M.S., and Pratt, D.A. Resolving the role of lipoxygenases in the initiation and execution of ferroptosis. ACS Cent. Sci. 4(3), 387-396 (2018).3. Chauvin, J.-P.R., Haidasz, E.A., Griesser, M., et al. Polysulfide-1-oxides react with peroxyl radicals as quickly as hindered phenolic antioxidants and do so by a surprising concerted homolytic substitution. Chem. Sci. 7(10), 6347-6356 (2016).

4-(2-Carboxyphenyl)-7-diethylamino-2-(7-diethylamino-2-oxochroman-3-yl)-chromylium perchlorate is an organic fluorescent dye that features a carboxyl functional group, with an excitation wavelength (λ ex) of approximately 650 nm and an emission wavelength (λ em) of around 690 nm [1].