Pyrazolone as a recognition site: Rhodamine 6G‐based fluorescent probe for the selective recognition of Fe³⁺ in acetonitrile–aqueous solution

Abstract

Two novel Rhodamine-pyrazolone-based colorimetric off-on fluorescent chemosensors for Fe(3+) ions were designed and synthesized using pyrazolone as the recognition moiety and Rhodamine 6G as the signalling moiety. The photophysical properties and Fe(3+) -binding properties of sensors L(1) and L(2) in acetonitrile-aqueous solution were also investigated. Both sensors successfully exhibit a remarkably 'turn-on' response, toward Fe(3+) , which was attributed to 1: 2 complex formation between Fe(3+) and L(1) /L(2) . The fluorescent and colorimetric response to Fe(3+) can be detected by the naked eye, which provides a facile method for the visual detection of Fe(3+) .

Preparation and characterization of novel Yellow-Green fluorescent polymerizable dye and its copolymer with application of highly selective sensor for cations iron

“…Iron is widely distributed in nature and is the most abundant metal ions in mammals, which plays an important role in many biochemical processes at the cellular level ranging from oxygen transport, electron transfer, DNA synthesis and repair, photosynthesis to nitrogen fixation (Kustka et al , 2002). Especially, ferric ion (Fe 3+ ) is widely retained in many proteins and enzymes either for structural purposes or as part of a catalytic site (Parihar et al , 2015). Iron is indispensable for most organisms, and its deficiency and overload can induce various disorders.…”

Luminescent properties of 4‐aminobenzo‐15‐crown‐5 after preferential binding of ferric ions in aqueous solutions

“…Abnormal levels of ferric ions can induce severe symptoms, including neurodegenerative diseases . Although numerous analytical techniques have been employed to quantify ferric ions, most methods require sophisticated synthesis and instruments …”

“…[14] Although numerous analytical techniques have been employed to quantify ferric ions, most methods require sophisticated synthesis and instruments. [15,16] Quantum mechanical calculations have indicated that water may lower the binding energy of metal with the crown ether compound. [17] Fluorescence properties of the 4AB15C5 system have been studied for photo-induced energy transfer [18] and cation-dependence.…”