Colorimetric and Fluorimetric Detection of Fe(III) Using a Rhodamine-Imidazole Hydrazone Based Chemosensor: Photophysical Properties, DFT, TGA, and DSC Studies.

Autor: Babagond V; Research Center, Department of Chemistry, Karnatak University's Karanatak Science College Dharwad, Dharwad, Karnataka, India., Katagi KS; Research Center, Department of Chemistry, Karnatak University's Karanatak Science College Dharwad, Dharwad, Karnataka, India. kskatagi69@gmail.com., Akki M; Research Center, Department of Chemistry, Karnatak University's Karanatak Science College Dharwad, Dharwad, Karnataka, India.; Centre for Nano and Material Sciences, Jain (Deemed-to-be University), Jain Global Campus, Bangalore, Karnataka, India., Jaggal A; Research Center, Department of Chemistry, Karnatak University's Karanatak Science College Dharwad, Dharwad, Karnataka, India.
Jazyk: angličtina
Zdroj: Journal of fluorescence [J Fluoresc] 2024 Sep 26. Date of Electronic Publication: 2024 Sep 26.
DOI: 10.1007/s10895-024-03942-z
Abstrakt: Rhodamine-imidazole hydrazones (RIH-1 & RIH-2) based chemosensors have been synthesized. These are characterised and evaluated by FT-IR spectroscopy, 1 H-NMR, 13 C-NMR, LCMS, absorption and fluorescence spectroscopy. These chemosensors exhibit enhanced sensitivity and selectivity in detecting the biologically significant Fe 3+ metal ion through both colorimetric and fluorescence changes. The optical properties have been investigated using binary acetonitrile-water (7:3 v/v) semi-aqueous solution. The probe RIH-1 can be deployed as a fluorescent and colorimetric probe for the detection of Fe 3+ ion. It shows an absorption band at 559 nm and an intensity band at 579 nm increasing up to 50-fold with the increase in the concentration of Fe 3+ with the detection limit as low as 11nM. In the visible light, RIH-1 helps in the detection of Fe 3+ ion through the naked eye, while the addition of Fe 3+ to the probe RIH-1 results in a colour change from colourless to pink. This is primarily due to the opening of the lactone ring in RIH-1. Notably, RIH-1 probe displays a high quantum yield of 0.51, after binding with Fe 3+ ions. Indeed, it has been found that sensor RIH-1 is very effective in sensing Fe 3+ ions through both fluorescence based and visual detection methods. Additionally, DFT studies of these chemosensors have been evaluated, TGA and DSC analysis showed good thermal stability.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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