使用基于罗丹明-咪唑腙的化学传感器进行铁(III)的比色和荧光检测:光物理性质、DFT、TGA 和 DSC 研究。

IF 2.6 4区 化学 Q2 BIOCHEMICAL RESEARCH METHODS Journal of Fluorescence Pub Date : 2024-09-26 DOI:10.1007/s10895-024-03942-z
Vardhaman Babagond, Kariyappa S Katagi, Mahesh Akki, Ashwini Jaggal
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引用次数: 0

摘要

我们合成了基于罗丹明-咪唑肼(RIH-1 和 RIH-2)的化学传感器。通过傅立叶变换红外光谱、1H-NMR、13C-NMR、LCMS、吸收和荧光光谱对这些化学传感器进行了表征和评估。这些化学传感器通过比色和荧光变化,在检测具有生物学意义的 Fe3+ 金属离子方面表现出更高的灵敏度和选择性。我们使用乙腈-水(7:3 v/v)二元半水溶液对其光学特性进行了研究。探针 RIH-1 可用作检测 Fe3+ 离子的荧光和比色探针。它在 559 纳米波长处显示吸收带,在 579 纳米波长处显示强度带,随着 Fe3+ 浓度的增加而增加 50 倍,检测限低至 11nM。在可见光下,RIH-1 有助于通过肉眼检测到 Fe3+ 离子,而在探针 RIH-1 中加入 Fe3+ 会导致颜色从无色变为粉红色。这主要是由于 RIH-1 中的内酯环打开了。值得注意的是,RIH-1 探针与 Fe3+ 离子结合后,量子产率高达 0.51。事实上,研究发现传感器 RIH-1 在通过荧光和视觉检测方法感知 Fe3+ 离子方面非常有效。此外,还对这些化学传感器进行了 DFT 研究评估,TGA 和 DSC 分析表明它们具有良好的热稳定性。
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Colorimetric and Fluorimetric Detection of Fe(III) Using a Rhodamine-Imidazole Hydrazone Based Chemosensor: Photophysical Properties, DFT, TGA, and DSC Studies.

Rhodamine-imidazole hydrazones (RIH-1 & RIH-2) based chemosensors have been synthesized. These are characterised and evaluated by FT-IR spectroscopy, 1H-NMR, 13C-NMR, LCMS, absorption and fluorescence spectroscopy. These chemosensors exhibit enhanced sensitivity and selectivity in detecting the biologically significant Fe3+ 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 Fe3+ 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 Fe3+ with the detection limit as low as 11nM. In the visible light, RIH-1 helps in the detection of Fe3+ ion through the naked eye, while the addition of Fe3+ 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 Fe3+ ions. Indeed, it has been found that sensor RIH-1 is very effective in sensing Fe3+ 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.

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来源期刊
Journal of Fluorescence
Journal of Fluorescence 化学-分析化学
CiteScore
4.60
自引率
7.40%
发文量
203
审稿时长
5.4 months
期刊介绍: Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.
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