Simple Iron(III) Complex Based Highly Sensitive Fluorescent Off‐On Sensor for the Detection of Trace Amount of Water in Organic Solvents and Edible Oilseeds,ChemistrySelect

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Simple Iron(III) Complex Based Highly Sensitive Fluorescent Off‐On Sensor for the Detection of Trace Amount of Water in Organic Solvents and Edible Oilseeds
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-09-10 , DOI: 10.1002/slct.202002530
Pawan Kumar ₁ , Srushti Gadiyaram ₁ , D. Amilan Jose ₁

Affiliation

Moisture detection in organic solvents and materials by using chemical sensors represent the latest research area in analytical chemistry. In this paper, we report a new fluorescent chemical sensor for the sensitive detection of trace amount of water in Tetrahydrofuran(THF), acetone and acetonitrile. The new probe L.Fe(III) complex consists of the fluorescent reporter dansyl dye attached with Fe(III) ion. Ligand L, and probe L.Fe(III) exhibits solvatochromism by intramolecular charge transfer (ICT) due to the donor‐acceptor properties of the dansyl compound. Probe L.Fe(III) is a non‐fluorescent compound and it becomes highly fluorescent in the presence of trace amount of water in THF, acetone and acetonitrile. The probe shows highly sensitive towards the water in THF with a limit of detection (LOD) as low as 0.0003 weight(wt) %. ¹H‐NMR, ESI‐MS and fluorescence lifetime studies established that displacement of metal from the probe is responsible for fluorescent enhancement. Further, for the first time probe L.Fe(III) has been explored as a fluorescence indicator for the qualitative and quantitative detection of trace‐level of water content in various edible oilseeds such as groundnut, mustard, sunflower, sesame and almond.

中文翻译：

基于简单铁（III）配合物的高灵敏度荧光关闭传感器，用于检测有机溶剂和食用油料中的痕量水

通过使用化学传感器对有机溶剂和材料中的水分进行检测代表了分析化学领域的最新研究领域。在本文中，我们报告了一种新型的荧光化学传感器，用于灵敏检测四氢呋喃（THF），丙酮和乙腈中的痕量水。新的探针L.Fe（III）络合物由附着有Fe（III）离子的荧光报告分子丹磺酰染料组成。配体L和探针L.Fe（III）由于丹磺酰基化合物的供体-受体特性，通过分子内电荷转移（ICT）表现出溶剂致变色现象。铁探针（III）是一种非荧光化合物，当在THF，丙酮和乙腈中存在痕量水时，它会发出高荧光。该探针显示出对THF中水的高度敏感性，检出限（LOD）低至0.0003重量（wt）％。¹ H-NMR，ESI-MS和荧光寿命研究表明，探针中金属的置换是荧光增强的原因。此外，探针L.Fe（III）首次被用作荧光指示剂，用于定性和定量检测各种食用油料中的痕量水分含量，如花生，芥末，向日葵，芝麻和杏仁。

更新日期：2020-09-10

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