School of Science, Dalian Maritime University, Dalian 116026, PR China.
College of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Aug 5;296:122621. doi: 10.1016/j.saa.2023.122621. Epub 2023 Mar 21.
A simple naphthalimide fluorophore NAP-HO 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-HO 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.
一种简单的萘酰亚胺荧光团 NAP-HO 被设计和合成。研究了其基本光物理性质，特别是发现该探针在水中显示出强的绿色荧光，而在各种有机溶剂中则较弱，这一特殊机制通过动态光散射（DLS）分析、固态发光和荧光成像得到了证实，是聚集诱导发光（AIE）。因此，对 NAP-HO 进行了水传感性能的测试，在绿光发射带的荧光强度与水含量之间得到了良好的线性关系，实现了对有机溶剂中水分的定量检测。在 ACN 中检测限为 0.004%（v/v），在 1,4-二氧六环中为 0.117%（v/v），在 THF 中为 0.028%（v/v），在 DMF 中为 0.022%（v/v），在 DMSO 中为 0.146%（v/v）。此外，该探针对水的响应时间在 5s 以内，具有较快的响应速度和良好的光稳定性。此外，该探针还成功地通过试纸用于有机溶剂中水分的快速、肉眼检测。这项工作为有机溶剂中痕量水分的检测提供了一种快速、灵敏、肉眼可见的方法，具有实际应用的潜力。
