A simple naphthalimide fluorophore NAP-H₂O was designed and synthesized. Basic photophysical properties were investigated, especially found that the probe showed robust green fluorescence in water compared with that in various organic solvents, and the specific mechanism was conformed to be the aggregation induced emission (AIE) through dynamic light scattering (DLS) analysis, solid-state luminescence and fluorescence imaging. Accordingly, the capability of NAP-H₂O for water sensing was examined, and good linear relationships between fluorescence intensities at the green emission band and the water content were obtained, enabling quantitative detection of water in organic solvents. The detection limits were calculated to be 0.004 % (v/v) in ACN, 0.117 % (v/v) in 1,4–dioxane, 0.028 % (v/v) in THF, 0.022 % (v/v) in DMF and 0.146 % (v/v) in DMSO, respectively. In addition, the probe presented fast response time within 5 s to water and good photostability. Furthermore, the probe was successfully applied for fast and naked-eye detection of water in organic solvents via test papers. This work provides a rapid, sensitive and naked-eye method for trace amount detection of water in organic solvents and has potential for practical applications.

设计并合成了一种简单的萘酰亚胺荧光团NAP-H ₂ O。研究了基本的光物理性质，特别是发现与在各种有机溶剂中相比，该探针在水中显示出强烈的绿色荧光，具体机制通过动态光散射（DLS）分析符合聚集诱导发射（AIE），固体态发光和荧光成像。因此， NAP-H ₂ O的能力检测了水的传感，绿色发射带的荧光强度与水含量之间具有良好的线性关系，能够定量检测有机溶剂中的水。经计算，检测限在 ACN 中为 0.004% (v/v)，在 1,4-二恶烷中为 0.117% (v/v)，在 THF 中为 0.028% (v/v)，在 DMF 中为 0.022% (v/v)和 0.146% (v/v) 在 DMSO 中，分别。此外，该探针对水具有 5 秒内的快速响应时间和良好的光稳定性。此外，该探针还成功应用于通过试纸快速、肉眼检测有机溶剂中的水分。该工作为有机溶剂中痕量水的快速、灵敏、肉眼检测提供了一种方法，具有实际应用潜力。