次氯酸盐是非制式爆炸物原料之一，实现对其液体及固体颗粒的快速、痕量识别对维护国家公共安全至关重要。目前，针对生物体或饮用水中次氯酸盐的检测研究较多，但存在检测限差，摩尔吸光系数低，响应慢且需多步合成等缺点。我们前期工作发现具有D-π-A结构的生色团对于次氯酸盐的检测具有检测限低、响应快的优点。因此，本研究拟通过以萘酚为电子给体，含氰基吸电子基为电子受体，C=C双键为活性位点的D-π-A型比色-荧光探针结构的设计，增加摩尔吸光系数及荧光强度，提高次氯酸盐检测灵敏度；通过制备孔隙率高的比色-荧光传感纤维膜，提高材料比表面积，达到快速、痕量检测的目的；通过水凝胶基底的引入，实现对次氯酸盐固体颗粒的检测。深入探讨探针对次氯酸盐的响应机理；进一步阐明电子受体的吸电子强弱及传感纤维膜结构对次氯酸盐检测性能的影响机制。此研究将为制备高灵敏、快速、痕量、可视化检测次氯酸盐的比色-荧光传感材料开辟新途径。

It is of great significance for homeland security to realize the rapid and trace identification of hypochlorite in liquid and particulate states, considering hypochlorite is one of the common raw materials for improvised explosives. However, most probes reported so far for specific detection of hypochlorite in organisms or drinking water are suffering from limited sensitivity, low molar absorptivity, long response time and complicated multi-step synthesis. In our previous work, the D-π-A structure within the chromophore molecule was found to be favorable for hypochlorite in terms of lowering the detection limit and speeding the response. Therefore, a serial of colorimetric-fluorescent probes with D-π-A structure are proposed here, in which the naphthol electron donating group and the cyano-containing electron accepting group is linked by an unsaturated double bond featuring the active site during detection. The designed probes are supposed to have increased molar absorption coefficient and fluorescence intensity for improving the detection sensitivity of hypochlorite. For the purpose of rapid and trace detection, the colorimetric-fluorescent sensing fiber membrane with high porosity will be prepared to achieve enlarged specific surface area. Finally, the detection of hypochlorite solid particles will be enabled by the introduction of the hydrogel substrate. Furthermore, the response mechanism of probes towards hypochlorite will be determined, while the effects of the electron-withdrawing strength of electron acceptors and the structure of fiber membranes on the the hypochlorite detection performance will be explored. This research will open up a new way to prepare colorimetric-fluorescent sensing materials for the highly sensitive, fast, trace, and visual detection of hypochlorite.