Novel molecular tools to discriminate Fe3+ and Fe2+ by fluorescence via “turn-on” responses within neuronal cells

Near-Infrared Fluorescent Probes with Large Stokes Shifts for Sensing Zn(II) Ions in Living Cells

“…3-((Bis(pyridin-2-ylmethyl)amino)methyl)-4-hydroxy-benzaldehyde ( 1 ), 38 9-(2-carboxyphenyl)-6-(diethylamino)-1,2,3,4-tetrahydroxanthylium perchlorate ( 2 ), 39,40 and 4-(2-carboxyphenyl)-7-(diethylamino)-2-methylchromenylium perchlorate ( 3 ) 41 were prepared according to reported procedures.…”

Fluorescence probing of the ferric Fenton reaction via novel chelation

“…This chelator exhibited a large improvement in desired chemosensing properties over a previously reported [O phenol , N tert-amine , X] (X = N py , S th , O furyl )-based analog. 13 The former binding site can selectively detect Fe 3+ via fluorescence enhancement, which allows entry into Fenton chemistry interplay wherein discrimination between Fe 3+ and Fe 2 is cleanly and conveniently made. Hydrogen peroxide can function both as a reductant or as an oxidant (Fig.…”

A highly selective fluorescent chemosensor for cyanide anions based on a chalcone derivative in the presence of iron(iii) ions, and its capacity for living cell imaging in mixed aqueous systems

“…4-Dimethylamino 4-fluorochalcone (1) was synthesized according to the references, and 1-Fe 3+ (100 mmol L À1 ) was synthesized by mixing the same volumes and the same concentrations (200 mmol L À1 ) of 1, FeCl 3 and CH 3 CN solution. 41,42 The optical properties and living cell imaging of 1-Fe 3+ were researched as below. The fluorescence quantum yield of 1 (QY, 0.324) was determined taking quinine sulfate in 0.05 mol L À1 sulfuric acid as the standard.…”

“…On completion of grinding as monitored by TLC (Thin Layer Chromatography), the mixture was diluted with cold water, neutralized by dilute HCl and recrystallized by ethanol. [41][42] Characterization: Elemental analysis for C 17 …”