A novel viologen-based photochromic coordination polymer, namely [Zn(CV)_0.5(BDC)(H₂O)]·2H₂O (1), has been successfully constructed via solvothermal self-assembly of Zn²⁺ ions with the 1, 1′-bis(2-carboxyethyl)-4, 4′-bipyridinium ((H₂CV)²⁺) as a photo-responsive functional unit and terephthalic acid (H₂BDC) as an auxiliary bridging ligand. Single-crystal X-ray diffraction analysis reveals that complex 1 features a 1D chain-like framework. Upon light irradiation, complex 1 exhibited a distinct photo-responsive color-changing behavior, transforming from colorless to blue. The blue-colored sample gradually faded and reverted to its original colorless state upon being placed in a dark environment at room temperature, demonstrating excellent reversible photochromic properties. On the basis of its photochromic performance, the application of this complex in ink-free printing has been explored. Furthermore, complex 1 emitted blue light under UV irradiation in a dark environment, revealing favorable photoluminescent characteristics. In addition, complex 1 possessed multiple photoswitchable properties.

基于向大一学生开设的“电解-量气法测定阿伏加德罗常数”实验，设计了Cu₂O的电化学合成及量气法测定阿伏加德罗常数一体化实验，该实验巧妙地融合了元素化学实验中有关Cu₂O的制备及性质实验内容。一次电解完成两个实验，节约电能，节省时间。Cu₂O的电化学合成及量气法测定阿伏加德罗常数一体化实验可作为一个微实验灵活穿插于大学基础化学实验教学中，对于培养大一学生的全方位思考的意识和多角度分析问题的能力以及经济、环保的理念有重要意义。