A thiourea-based fluorescent chemosensor NADA, (E)-2-(4-(diethylamino)-2-hydroxybenzylidene)-N-(naphthalen-1-yl)hydrazine-1-carbothioamide, has been designed and synthesized. NADA could detect Ga³⁺ through a fluorescent turn-on with a low detection limit (0.29 μM). Importantly, NADA could effectively discriminate Ga³⁺ from Al³⁺ and In³⁺. The binding mechanism of NADA with Ga³⁺ was identified by ESI-mass, NMR titration, and DFT calculations.

中文翻译：

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一种含硫脲的荧光化学传感器，用于检测Ga3。

设计并合成了一种基于硫脲的荧光化学传感器NADA（E）-2-（4-（二乙氨基）-2-羟基亚苄基）-N-（萘-1-基）肼-1-碳硫代酰胺。NADA可以通过低检测限（0.29μM）的荧光灯开启来检测Ga ³⁺。重要的是，NADA可以有效地区分Ga ³⁺与Al ³⁺和In ³⁺。通过ESI质谱，NMR滴定和DFT计算确定了NADA与Ga ³⁺的结合机理。