A fluorescent sensor, N-(quinolin-8-yl)-2-(quinolin-8-yloxy)acetamide (HL), based on 8-aminoquinoline and 8-hydroxyquinoline platforms has been synthesized. This sensor displays high selectivity and sensitive fluorescence enhancement to Cd²⁺ in ethanol. Moreover, sensor HL can distinguish Cd²⁺ from Zn²⁺ via two different sensing mechanisms (photoinduced electron transfer for Cd²⁺; internal charge transfer for Zn²⁺). The composition of the complex Cd²⁺/HL or Zn²⁺/L^– has been found to be 1:1, based on the fluorescence/absorption titration and further confirmed by X-ray crystallography.

中文翻译：

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基于喹啉平台的锌离子镉高选择性荧光传感器

合成了基于8-氨基喹啉和8-羟基喹啉平台的荧光传感器N-（喹啉-8-基）-2-（喹啉-8-基氧基）乙酰胺（HL）。该传感器显示出对乙醇中Cd ^2+的高选择性和灵敏的荧光增强。此外，传感器HL可以通过两种不同的传感机制（Cd ^2+的光感应电子转移； Zn ^2+的内部电荷转移）区分Cd ²⁺和Zn ²⁺。复杂的Cd ²⁺ / HL或Zn ²⁺ / L ^–的组成 基于荧光/吸收滴定法，已经发现其为1：1，并且通过X射线晶体学进一步证实。