A novel naphthalene-pyridine Schiff base sensor for highly selective colorimetric detection of Fe2+, Fe3+, and Cu2+ ions DOI
Poonam Kaswan

International Journal of Chemical Reactor Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract A novel Schiff-base derivative, PNOL, incorporating pyridine and naphthalene moieties, was synthesized characterized using 1 H NMR, 13 C FTIR, UV–Vis spectroscopy. The spectral behavior of PNOL investigated under varying solvent, pH, concentration conditions, revealing its significant sensitivity to environmental factors. ligand demonstrated excellent selectivity for Fe 3+ , 2+ Cu ions, with distinct colorimetric responses visible the naked eye. Upon metal ion binding, blue shifts in absorbance were observed at 82 nm 48 54 along an isosbestic point ∼380 nm, confirming complex formation. Job’s plot analysis established 2:1 1:1 binding stoichiometries respectively, while exhibited a constants determined 0.56 × 10 7 M −1 0.35 0.64 LOD values as low 2.4 −8 mg/L (Fe ), 5 6.7 (Cu surpassing previously reported sensors. attributed ligand-to-metal charge transfer (LMCT) internal (ICT) interactions, inhibiting C=N isomerization. These findings establish efficient selective sensor potential applications monitoring, analytical chemistry, biosensing.

Language: Английский

Applications of Luminescent Cyclometalated Metal Complexes as Sensors and Switches DOI
Poonam Kaswan, Miklesh Prasad Yadav,

Shaila Dhotre

et al.

Synlett, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

Abstract Cyclometalated complexes, including those with pincer ligands and other chelating frameworks, such as porphyrin rings polyenes, have garnered significant attention due to their diverse applications in ion analyte detection across synthetic chemistry, environmental monitoring, medicine, electronics. These complexes exhibit fascinating chromic behaviors, mechanochromism, chemochromism, vapochromism, which are particularly useful sensing applications. Of particular interest photophysical properties, especially involving lanthanides, offer unique luminescent optical characteristics. Metals nickel (Ni), palladium (Pd), ruthenium (Ru), gold (Au), rhodium (Rh) been extensively studied order understand photochemical activity explore potential light-emitting devices, photo-induced electron transfer, technologies. Their vapochromic mechanochromic properties make them highly attractive for sensing, while photoluminescent capabilities enhance utility optoelectronic devices practical This review provides a comprehensive overview of applications, gas, cation, anion sensing. The discussion also highlights the need incorporate specific examples that demonstrate suitability these targeted tasks, further emphasizing promise advancing sensor device 1 Introduction 2 Strategies 3 Applications 4 Other Miscellaneous Examples 5 Drawbacks Limitations 6 Conclusion Perspectives 7 List Abbreviations Definitions

Language: Английский

Citations

1
A novel naphthalene-pyridine Schiff base sensor for highly selective colorimetric detection of Fe2+, Fe3+, and Cu2+ ions DOI
Poonam Kaswan

International Journal of Chemical Reactor Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

Abstract A novel Schiff-base derivative, PNOL, incorporating pyridine and naphthalene moieties, was synthesized characterized using 1 H NMR, 13 C FTIR, UV–Vis spectroscopy. The spectral behavior of PNOL investigated under varying solvent, pH, concentration conditions, revealing its significant sensitivity to environmental factors. ligand demonstrated excellent selectivity for Fe 3+ , 2+ Cu ions, with distinct colorimetric responses visible the naked eye. Upon metal ion binding, blue shifts in absorbance were observed at 82 nm 48 54 along an isosbestic point ∼380 nm, confirming complex formation. Job’s plot analysis established 2:1 1:1 binding stoichiometries respectively, while exhibited a constants determined 0.56 × 10 7 M −1 0.35 0.64 LOD values as low 2.4 −8 mg/L (Fe ), 5 6.7 (Cu surpassing previously reported sensors. attributed ligand-to-metal charge transfer (LMCT) internal (ICT) interactions, inhibiting C=N isomerization. These findings establish efficient selective sensor potential applications monitoring, analytical chemistry, biosensing.

Language: Английский

Citations

0