Characterization of an Al$^{3+}$-selective fluorescent probe based on a benzoyl hydrazine derivative and its application in cell imaging

A novel diarylethene‐based fluorescence sensor with a benzohydrazide unit for the detection of Zn2+

“…of EDTA was added gradually, a distinct fluorescence decrease occurred at 544 nm, indicating that the fluorescence spectrum 1o′ returned to its original state 1o . According to previous reports, [ 63,64 ] free 1o showed a weak fluorescence intensity due to the isomerization of CN bond. Upon addition of Zn 2+ , the formation of stable chelate 1o′ leads to the inhibition of CN bond isomerization and enhanced molecular rigidity, which results in the chelated enhanced fluorescence (CHEF) effect and increased emission intensity.…”

A new fluorescent and colorimetric chemosensor for Al3+ and F−/CN− based on a julolidine unit and its bioimaging in living cells

“…3, HL exhibited weak uorescence emission intensity (F ¼ 0.008) at 420 nm excitation due to C]N isomerization and photoinduced electron transfer (PET) processes. 41,42 The uorescence emission intensity of HL at 521 nm enhanced gradually along with the increase in Al 3+ concentration until the amount of Al 3+ reached 5.0 equivalents with a high quantum yield (F ¼ 0.464). Meanwhile, the uorescence color of HL changed from very faint orange to strong cyan.…”

Synthesis and analytical applications of thiosemicarbazide derivative

“…In the 1 H-NMR spectra, resonances assigned to the three N-H protons of the compound were detected at 9.95 and 10.01 ppm (s, 2H, NHCSMH) and 10.48 ppm (s, 1H, NH-C=O) respectively. In the 13…”

“…Therefore, the fluoroionophore comprising an appropriate ionophore and an effective fluorophore can be used to determine the target ion selectively and sensitively. From this point of view, many fluoroionophore compounds synthesized for metal determination are available in the literature [11][12][13][14].…”