关键词: 铜碘簇合物, 荧光检测, 亚硝酸盐, 化学综合设计实验

Abstract: To foster student’s research acumen and innovative abilities, and to deepen their comprehension of inorganic cluster compounds and fluorescent properties, a comprehensive experiment focusing on the synthesis of a cuprous iodide coordination polymer and its application in fluorescent detection of nitrites is designed. This experiment employs a nano-precipitation technique for the preparation of cuprous iodide coordination polymer. Various analytical methods, including Fourier transform infrared (FTIR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), UV-visible spectrophotometry, and fluorescence spectrophotometer, were utilized to characterize the material’s structure and properties. The investigation into the polymer’s fluorescence in detecting nitrites revealed high selectivity and sensitivity, with a detection limit of 3.73 µmol∙L⁻¹, positioning the material as a viable “on-off” fluorescence probe for nitrite detection. Through this experiment, students can not only gain the deeper understanding of the structure of cluster polymers and the frontiers of fluorescence detection, but also learn the fundamental knowledge and operational skills in analytical instruments like UV-visible spectrophotometer, fluorescence spectrophotometer. This groundwork is essential for their future engagement in scientific research and related professional activities.

Key words: Cuprous iodide coordination polymer, Fluorescent detection, Nitrite, Comprehensive chemistry design experiment