A novel 1,8-naphthalimide-based chemosensor was designed and synthesized for rapid recognition of Cr³⁺. The desired sensor showed off-on fluorescent and lifetime-based response upon Cr³⁺ and S²⁻ in solution, on test paper and in cells. With the intensity-based method, the limit of quantification (LOQ) value was 0–5.5 × 10⁻⁵ M and the detection limit could be as low as 0.60 ppm. The 'in situ' prepared Cr³⁺ complex can recognize S²⁻ among a series of common anions with high selectivity and sensitivity, the LOD can be as low as 307 nM. The lifetime of the sensor changes from 4.95 to 4.89 and further to 5.88 ns upon addition of Cr³⁺ and S²⁻ in turn.

设计并合成了一种新型的1,8-萘二甲酰亚胺基化学传感器，用于快速识别Cr ³⁺。理想的传感器在溶液，试纸和电池中对Cr ³⁺和S ^2-表现出不正常的荧光和基于寿命的响应。使用基于强度的方法，定量限（LOQ）值为0–5.5×10 ^-5  M，检测限可能低至0.60 ppm。“原位”制备的Cr ³⁺络合物可以高选择性和高灵敏度识别一系列常见阴离子中的S ^2-，其LOD可以低至307 nM。加入Cr ³⁺后，传感器的寿命从4.95更改为4.89，然后进一步更改为5.88 ns和S ²⁻依次。