A simple ratiometric push–pull and ‘aggregation-induced emission enhancement (AIEE)’ active pyrene based compound, 2-(pyren-1-yl)pyridine (L), was synthesized and characterized by ¹H NMR, HRMS and SXRD. The synthesized compound was established as a highly selective and sensitive multi-functional sensor that exhibits a ratiometric fluorescent response, detecting picric acid, H⁺ and Al³⁺ [observed sensitivity: 56 nM (12.82 ppb) for picric acid; 2.4 nM (0.27 ppb) for trifluroacetic acid; 2.3 nM (0.86 ppb) for Al³⁺]. Both L and LH⁺ have shown emission tuning ability on varying their concentration in solution. Computational calculations (DFT and TD-DFT) have been correlated with the experimental spectroscopic properties.

中文翻译：

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简单的比例推挽与“聚集诱导的增强发射”活性pyr衍生物：多功能且高度灵敏的荧光传感器†

合成了一种简单的比例推挽和“聚集诱导的发射增强（AIEE）”活性pyr基化合物2-（pyren-1-yl）pyridine（L），并通过¹ H NMR，HRMS和SXRD对其进行了表征。合成的化合物被确立为具有选择性荧光响应的高选择性和多功能传感器，可检测苦味酸，H ⁺和Al ³⁺ [观察到的苦味酸灵敏度为56 nM（12.82 ppb）；检测到的苦味酸为56 nM（12.82 ppb）。三氟乙酸为2.4 nM（0.27 ppb）；Al ³⁺ ]为2.3 nM（0.86 ppb）。L和LH ⁺在改变溶液中的浓度方面已经显示出发射调谐能力。计算计算（DFT和TD-DFT）已与实验光谱特性相关联。