1-(Pyridin-2-yl-hydrazonomethyl)-naphthalen-2-ol (PNOH) is a naphthalene-based fluorescence dual chemo-sensor for Al³⁺ and Zn²⁺. The probe (PNOH) is spectroscopically characterised and the chemo-sensing mechanism has been demonstrated through ¹H 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 Al³⁺and Zn²⁺via 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 Al³⁺ (λem- 460 nm) and Zn²⁺ (λ_em- 510 nm) exciting at same wavelength (λ_ex- 420 nm) while high intense emission appears at two different wavelengths. Limit of detection (LOD) of PNOH towards Al³⁺ & Zn²⁺ are found to be 60 nM & 365 nM respectively. Real water sample analysis has also been demonstrated by using the probe PNOH.

1-（吡啶-2-基-肼基甲基）-萘-2-醇（PNOH）是用于Al ³⁺和Zn ²⁺的基于萘的荧光双化学传感器。探针（PNOH）具有光谱学特征，并且通过¹ H NMR，吸收以及稳态和时间分辨荧光研究证明了化学感应机理。PNOH的“开启”发光特性用于通过络合物形成的螯合增强荧光（CHEF）选择性检测痕量的Al ³⁺和Zn ²⁺。从基于UV-Vis滴定的Job's图中观察到每种传感器-金属配合物的化学计量比为1：1。探针（PNOH）的最有希望的优势是其在Al的一锅法检测中的应用³⁺（λem-460 nm）和Zn ²⁺（_λem -510 nm）在相同波长（_λex -420 nm）激发，而高强度发射出现在两个不同的波长。发现PNOH对Al ³⁺和Zn ^2+的检出限（LOD）分别为60 nM和365 nM。使用探针PNOH也已证明了实际水样分析。