In this study, the amine-functionalized ZIF-11 material was fabricated through post-synthesis modification by using 2-aminobenzimidazole (ABI) to introduce ligand for detection of copper ions, enhancing the stability of ZIF-11 in aqueous solution, and generation an aggregation-fluorescent nanomaterials. A comprehensive set of characterization techniques, including Powder X-ray diffraction, N₂ sorption isotherms, scanning electron microscopy, Fourier-transform infrared spectroscopy, and thermal gravimetric analysis, was employed to elucidate the properties of the amine-functionalized ZIF-11 and CUR loaded nanocomposites. This modification partially replaced the benzimidazole linkers in the ZIF-11-ABI structure with ABI linkers, enhancing the stability of the ZIF-11 in water. The fluorescence properties of curcumin in ZIF-11-ABI and ZIF-11 exhibited differences in copper ion capture sites. The observed fluorescence quenching of ZIF-11-ABI when immersed in a copper solution indicated the disruption of dimerization between zinc clusters and curcumin, caused by copper ions interacting with enol groups. These findings suggest that curcumin incorporated into ZIF-11-ABI has excellent potential as a marker material for the detection of copper ions.

本研究利用2-氨基苯并咪唑（ABI）引入配体进行铜离子检测，通过合成后修饰制备了胺功能化的ZIF-11材料，增强了ZIF-11在水溶液中的稳定性，并生成了聚集荧光纳米材料。采用一整套表征技术，包括粉末 X 射线衍射、N ₂吸附等温线、扫描电子显微镜、傅里叶变换红外光谱和热重分析，来阐明胺官能化 ZIF-11 和 CUR 的性能负载纳米复合材料。该修饰部分用ABI连接体取代了ZIF-11-ABI结构中的苯并咪唑连接体，增强了ZIF-11在水中的稳定性。 ZIF-11-ABI 和 ZIF-11 中姜黄素的荧光特性在铜离子捕获位点上表现出差异。当 ZIF-11-ABI 浸入铜溶液中时，观察到的荧光猝灭表明锌簇和姜黄素之间的二聚作用被破坏，这是由铜离子与烯醇基团相互作用引起的。这些发现表明，ZIF-11-ABI 中掺入的姜黄素作为检测铜离子的标记材料具有极好的潜力。