A novel donor-acceptor fluorescent sensor was designed and synthesized. The sensor exhibited high selectivity and sensitivity to Zn2+ in acetonitrile solution. When 3.0 equiv. of Zn2+ was added gradually, the emission intensity at 500 nm increased 54-fold, accompanied by the fluorescent color of the solution changed from dark to green. Job's plot and ESI-MS were carried out to verify a 1:1 stoichiometric complex was formed between the sensor and Zn2+. The limit of detection (LOD) to Zn2+ was measured to be 2.81 × 10-9 mol L-1. Moreover, the sensor not only could be used to detect Zn2+ in practical water samples with high accuracy, but also could be made into test paper for the qualitative detection for Zn2+.

中文翻译：

---

一种新型高选择性Zn2+供体-受体荧光传感器及其在试纸中的应用。

设计并合成了一种新型供体受体荧光传感器。该传感器对乙腈溶液中的 Zn2+ 表现出高选择性和灵敏度。当 3.0 等效。Zn2+ 逐渐加入，500 nm 处的发射强度增加了 54 倍，同时溶液的荧光颜色由深变绿。执行乔布斯图和 ESI-MS 以验证在传感器和 Zn2+ 之间形成了 1:1 的化学计量络合物。Zn2+ 的检测限 (LOD) 经测量为 2.81 × 10-9 mol L-1。此外，该传感器不仅可用于高精度检测实际水样中的Zn2+，还可制成试纸对Zn2+进行定性检测。