Hot electron-induced electrochemiluminescence of fluorescein in aqueous solution

Probing Photocatalytic Active Sites on a Single Titanosilicate Zeolite with a Redox‐Responsive Fluorescent Dye

“…As demonstrated in Figure 1 C, however, the fluorescence intensity of the APF phosphate buffer solution was greatly enhanced by applying a positive potential (0↔+0.5 V QRE , where a silver wire was used as a quasi‐reference electrode (QRE)). The onset of the increase in the fluorescence intensity at around +0.35 V QRE can be easily correlated to the oxidation potential ( E ox ) of aniline (+0.36 V QRE (+0.63 V NHE ; NHE=normal hydrogen electrode)),9 which is much lower than that of fluorescein (+1.1 V NHE , Figure S4 in the Supporting Information),10 thereby supporting the reaction scheme depicted in Figure 1 A.…”

Electrochemiluminescence of fluorescein in alkaline solution at a polycrystalline gold electrode

“…It was also reported that fluorescein could be oxidized by oxidants such as potassium permanganate [31] or hydrogen peroxide [32] to produce CL. The fluorescein ECL induced by using constant anodic potential [33] and by hot electron has also been studied [34].…”

Probing Photocatalytic Active Sites on a Single Titanosilicate Zeolite with a Redox‐Responsive Fluorescent Dye

“…As demonstrated in Figure 1 C, however, the fluorescence intensity of the APF phosphate buffer solution was greatly enhanced by applying a positive potential (0$ + 0.5 V QRE , where a silver wire was used as a quasi-reference electrode (QRE)). The onset of the increase in the fluorescence intensity at around + 0.35 V QRE can be easily correlated to the oxidation potential (E ox ) of aniline (+ 0.36 V QRE (+ 0.63 V NHE ; NHE = normal hydrogen electrode)), [9] which is much lower than that of fluorescein (+ 1.1 V NHE , Figure S4 in the Supporting Information), [10] thereby supporting the reaction scheme depicted in Figure 1 A. On the basis of these experimental results, we evaluated the photocatalytic activity of individual ETS-10 crystals by imaging the fluorescence generated by oxidized APF molecules during UV irradiation.…”