A Schiff-base compound, 2-((E)-1-(2-(dimethylamino)ethylimino)ethyl)phenol (HL), has been synthesized and characterized by different spectroscopic methods The chemosensor shows selective “turn–on” cyan colour fluorescence response to Al³⁺ ion over a wide variety of other competing metal ions such as Zn²⁺, Cu²⁺, Co²⁺, Ni²⁺, Cd²⁺, Fe²⁺, Mg²⁺, Hg²⁺, Mn²⁺, Ca²⁺, Pb²⁺, Fe³⁺, Cr³⁺, Na⁺ and K⁺. The fluorescence emission intensity at 462 nm displayed by the chemosensor, increases progressively during the addition of Al³⁺ ion until saturation point, with over 20 fold intensity enhancement. Additionally, the linear range for the chemosensor has been found to be 0.5 × 10⁻⁶ to 10 × 10⁻⁶ mol/L, the detection limit of the chemosensor is 4.32 × 10⁻⁶ M and the stability constant is 2.1 × 10⁴ M⁻¹. Similar fluorescence behaviour is also observed in a variety of solvents and solvent mixtures in the presence of Al³⁺. The fluorescent emission has also been detected when a sample solution of HL containing Al³⁺ is irradiated by UV light. UV–vis titration experiment has established that the chemosensor HL, binds to Al³⁺ in 2:1 ratio. The Density Functional Theory (DFT) and Time Dependent-Density Functional Theory (TD–DFT) calculations were performed on HL, L⁻ and its aluminium complex which give insight into the geometric, electronic, thermodynamic and optical properties of chemosensor-Al³⁺ interactions.

合成了席夫碱化合物2-（（E）-1-（2-（二甲基氨基）乙基亚氨基）乙基）苯酚（HL），并通过不同的光谱方法对其进行了表征。化学传感器显示出选择性的“开启”青色荧光响应的Al ³⁺离子在各种各样的其他竞争金属离子如Zn的²⁺，铜²⁺，钴²⁺，镍²⁺，镉²⁺，铁²⁺，镁²⁺，汞²⁺， Mn 2 ⁺，Ca 2 ⁺，Pb 2 ⁺，Fe ³⁺，Cr ³⁺，Na ⁺和K ⁺。化学传感器显示的在462 nm处的荧光发射强度在添加Al ³⁺离子至饱和点期间逐渐增加，强度增强了20倍以上。此外，化学传感器的线性范围为0.5×10 ^-6至10×10 ^-6  mol / L，化学传感器的检测极限为4.32×10 ^-6  M，稳定常数为2.1×10 ⁴  M ^-1。在存在Al ³⁺的多种溶剂和溶剂混合物中，也观察到了类似的荧光行为。当含有Al ³⁺的HL样品溶液时也检测到荧光发射被紫外线照射。UV-vis滴定实验已确定化学传感器HL以2：1的比例结合到Al ³⁺上。密度泛函理论（DFT）和时间依赖性-密度泛函理论（TD-DFT）计算是对HL，L进行^-和它的铝配合物，其深入了解化学传感器-Al的几何，电子，热力学和光学性能³⁺互动。