Development of highly selective fluorescent ferrocenyl‐iminopyridine chemosensor for biologically relevant Fe³⁺

Abstract

Design, synthesis, characterization, and ion detection studies of two ferroceneappended Schiff bases namely N-(2-[ferrocenylamino]ethyl)-5-nitropyridin-2-amine(1) and ferrocenylamino-1H-imidazole-4-carboxamide (2) been reported. Both the chemosensors have been thoroughly characterized using Fourier transfer infrared, 1 H and 13 C nuclear magnetic resonance, high resolution mass spectrometry, and ultraviolet/visible (UV/visible) and fluorescence spectral techniques. Probes 1 and 2 were designed with the aim of appending the ferrocenyl group with pyridine ring having an amine substitution (for 1) and imidazole ring with an amide substitution (for 2). Interaction of these probes with a series of cations and anions was examined through UV/vis and fluorescence spectral techniques. Probe 2 exhibited an insignificant

Zinc-Induced Luminescent l-Valine-Based Pseudopeptidic Soft Bioinspired Materials for Precise Tuning of Nanoassembly

“…The binding constant (Ks) was investigated by using the nonlinear equation via a plot between the emission intensity and the Zn(II) concentration. The binding constant value ( K s ) was found to be 1.30 × 10 6 M –1 for 1- Zn(II) (Figure a), 8.0 × 10 5 M –1 for 2- Zn(II) (Figure b), and 1.32 × 10 6 M –1 for 3- Zn(II) (Figure c) systems …”

“…The binding constant value (K s ) was found to be 1.30 × 10 6 M −1 for 1-Zn(II) (Figure 5a), 8.0 × 10 5 M −1 for 2-Zn(II) (Figure 5b), and 1.32 × 10 6 M −1 for 3-Zn(II) (Figure 5c) systems. 41 To investigate the limit of detection (LOD) values, we added Zn(II) ions with varying concentrations (10 −2 M to 10 −12 M) to the solution of 1−3 (10 μM) to evaluate the sensitivity with the Zn(II) ion. A graph between the concentration and fluorescence intensity exhibits a significant change at 10 −6 M for both 1-Zn(II) and 2-Zn(II) while at 10 −7 M for 3-Zn(II), (Figure S17).…”

Smart and intelligent optical materials for sensing applications

“…Furthermore, a novel dual-mode (colorimetry and fluorometry) optical approach for qualitative and quantitative identification of iron (II) and gallic acid (GA) using the Fenton reaction-TMB method was developed by Qi et al [34]. These studies established the high selectivity and sensitivity of the dual-mode assay towards recognition of iron (II) and GA. Sharma et al [35] reported the fabrication, characterization, design, and ion identification of different ferrocenyl-Schiff bases (1) and ( 2). The results suggested that probe 1 displayed a very selective fluorescence detection of Fe 3+ ions, whereas probe 2 did not display any specific response towards anions and cations.…”

Anticounterfeiting Feature of a Writable and Self-Erasable Ni(II)-Metallogel Pad via Fluorescent “Turn-On” Detection of Cyanide

“…4,5 To analyze and determine CN − , various methods such as ion chromatography, 6 titrimetric analysis, 7 and electrochemical methods 8 the selective sensing of CN − is highly imperative and attractive with regard to chemical and physical methods. 4 Moreover, advancements in supramolecular fluorescent materials 9 are increasing due to their fascinating characteristics, such as high sensitivity, naked-eye detection, and fast response time. 10−12 Novel fluorescent materials based on nanofibers, dot formation, polymers, and metallogels involving different sensing mechanisms for detection of toxic CN − find vast applications in various fields.…”