A pyrene–N-phenylparaphenylene diamine-based imine conjugate for the detection of trace amounts of water in organic solvents: real-time application in honey samples,New Journal of Chemistry

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A pyrene–N-phenylparaphenylene diamine-based imine conjugate for the detection of trace amounts of water in organic solvents: real-time application in honey samples
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2022-08-23 , DOI: 10.1039/d2nj03605c
Ramakrishnan AbhijnaKrishna ₁ , Natarajan Vijay ₁ , Sivan Velmathi ₁

Affiliation

A one-step condensation procedure in the presence of green solvent EtOH was used to make a pyrene-based fluorescent sensor (PNPD). It could be used as a rapid, low-cost, selective, and sensitive chemodosimetric probe to detect water content. PNPD showed a cyan-blue emission in the presence of water due to cleavage of the imine bond, thus giving back the emission of pyrene carboxaldehyde. It displayed a relative error percentage of less than x ± 0.5% for the percentage detection of water content with noticeable DL and QL as compared to the reported works. A normalised approach was also developed to address the lack of knowledge in the quantitative detection of water content in an unknown sample. This approach can be used with any solvents and instruments, making it a quick, cost-effective, sensitive, and selective water sensing technique. The findings revealed that PNPD can detect water in polar, non-polar, protic, and aprotic solvents, with the detection limit and quantitation limit preferring polar aprotic solvent ACN and dioxane in both higher and lower water content. Also, we have developed a method for quantitative detection of water content in organic solvents by fluorescence studies. The real-time applicability of PNPD has been analysed by taking honey as an example, and a detection limit of 0.206 v% and quantitation limit of 0.624 v% have been found.

中文翻译：

用于检测有机溶剂中痕量水的芘-N-苯基对苯二胺基亚胺偶联物：在蜂蜜样品中的实时应用

在绿色溶剂 EtOH 存在下的一步缩合过程用于制造基于芘的荧光传感器 (PNPD)。它可以作为一种快速、低成本、选择性和灵敏的化学剂量探针来检测水含量。由于亚胺键的断裂，PNPD 在存在水的情况下显示出青蓝色的发射，从而使芘甲醛的发射返回。它显示的相对误差百分比小于x与报告的作品相比，具有明显 DL 和 QL 的含水量检测百分比为 ± 0.5%。还开发了一种标准化方法来解决在定量检测未知样品中的水含量方面缺乏知识的问题。这种方法可用于任何溶剂和仪器，使其成为一种快速、经济、灵敏和选择性的水传感技术。研究结果表明，PNPD 可以检测极性、非极性、质子和非质子溶剂中的水，检测限和定量限在较高和较低的含水量中均优先于极性非质子溶剂乙腈和二恶烷。此外，我们还开发了一种通过荧光研究定量检测有机溶剂中水含量的方法。以蜂蜜为例，分析了PNPD的实时适用性，

更新日期：2022-08-23

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