1,8-Naphthalimide-based sulfamethizole molecule (L6) has been designed and synthesized which have properties like AIEE active, and ratiometric fluorescence sensing of Hg²⁺ and Ag⁺ ions. The hydrophobic nature of naphthalimide fluorogenic moiety instigates the aggregation induced emission (AIE) in aqueous medium, led to excimer emission upon intramolecular excimer formation via metal ion-induced assembly. The high selectivity of the sensor was due to quenching of the monomeric emission of L6 at 390 nm with red shift to gradual enhancement in new peak at 483 nm and 478 nm for Hg²⁺ and Ag⁺ ions respectively, which is responsible for the ratiometric detection. The competitive experiments revealed that the chemosensor is selective to Hg²⁺ over Ag⁺ ion and selective and sensitive ratiometric response to Hg²⁺ ion without interference of any other metal ions. A limit of detection of Hg²⁺ ion was found 14.7 nM in 99 % aqueous solution. Also, the visual fluorescence color change of L6 from blue to green was observed under uv-lamp upon addition of Hg²⁺ ion to L6 solution.

设计并合成了基于1,8-萘二甲酰亚胺的磺胺甲基分子（L6），该分子具有AIEE活性以及Hg ²⁺和Ag ⁺离子的比例荧光传感等特性。萘二甲酰亚胺荧光部分的疏水性促使水介质中的聚集诱导发射（AIE），通过金属离子诱导的组装形成分子内准分子后导致准分子发射。传感器的高选择性归因于Lg在390 nm处的单体发射猝灭，并且对于Hg ²⁺和Ag ^+，在483 nm和478 nm处的新峰出现红移并逐渐增强。离子分别负责比例检测。竞争性实验表明，化学传感器对Hg ^2+的选择性高于对Ag ⁺离子的选择性，并且对Hg ²⁺离子的选择性和灵敏的比例响应不受任何其他金属离子的干扰。发现在99％的水溶液中Hg ²⁺离子的检测极限为14.7 nM。另外，在向L6溶液中加入Hg ²⁺离子后，在紫外灯下观察到L6从蓝色到绿色的可见荧光颜色变化。