用于选择性检测水中 Al 和 Zn 的荧光“开启”双传感器的设计合成。

Designed Synthesis of Fluorescence 'Turn-on' Dual Sensor for Selective Detection of Al and Zn in Water.

机构信息

Department of Chemistry, Vidyasagar University, Midnapore, WB, 721 102, India.

出版信息

J Fluoresc. 2021 Mar;31(2):315-325. doi: 10.1007/s10895-020-02664-2.

Abstract

1-(Pyridin-2-yl-hydrazonomethyl)-naphthalen-2-ol (PNOH) is a naphthalene-based fluorescence dual chemo-sensor for Al and Zn. The probe (PNOH) is spectroscopically characterised and the chemo-sensing mechanism has been demonstrated through H NMR, absorption and both steady state and time resolved fluorescence study. The 'turn-on' luminescence property of PNOH is used for the selective detection of trace amount of Aland Znvia chelation enhanced fluorescence (CHEF) through complex formation. The 1:1 stoichiometry of each sensor-metal complex is observed from Job's plot based on UV-Vis titration. Most promising advantage of the probe (PNOH) is its application in the one-pot detection of Al (λem- 460 nm) and Zn (λ- 510 nm) exciting at same wavelength (λ- 420 nm) while high intense emission appears at two different wavelengths. Limit of detection (LOD) of PNOH towards Al & Zn are found to be 60 nM & 365 nM respectively. Real water sample analysis has also been demonstrated by using the probe PNOH.

摘要

1-(吡啶-2-基-腙基甲基)-萘-2-醇（PNOH）是一种基于萘的荧光双化学传感器，可用于检测 Al 和 Zn。通过光谱学对探针（PNOH）进行了表征，并通过 1H NMR、吸收和稳态及时间分辨荧光研究证明了其化学传感机制。PNOH 的“开启”发光特性用于通过螯合增强荧光（CHEF）通过配合物形成选择性检测痕量的 Al 和 Zn。从基于紫外-可见滴定的 Job 图观察到每个传感器-金属配合物的 1:1 化学计量比。探针（PNOH）最有前途的优点是它可用于在同一波长（λ-420nm）下激发时同时检测 Al（λem-460nm）和 Zn（λ-510nm），同时在两个不同波长处呈现高强度发射。PNOH 对 Al 和 Zn 的检测限（LOD）分别为 60nM 和 365nM。还使用探针 PNOH 对实际水样进行了分析。