作为我国高等化学教育发展的见证者与推动者，《大学化学》自创刊之日起，便肩负起引领教学改革、服务一线教师的重任。四十年风雨兼程，期刊在摸索中成长，离不开几代编委、作者和读者的共同努力。展望未来，我们初心不改，将继续脚踏实地，努力提高质量，让《大学化学》更好地成为化学教师们的良师益友，为建设教育强国贡献一份力量。在此，深切缅怀创刊先驱，并向所有支持者致以最诚挚的谢意！

本文以紫甘蓝蔬菜为原料，进行了pH、金属离子和各种食品添加剂等一系列稳定性分析，探索紫甘蓝色素的最佳存储和使用环境。研究表明，紫甘蓝色素对pH敏感，随着pH增大，色素保留率逐渐减小;不同金属离子对紫甘蓝色素的稳定性也有影响，Fe³⁺会破坏紫甘蓝色素的结构，降低稳定性，保留率仅为8.68%;而Ca²⁺能提高其稳定性。添加剂蔗糖也可提高其稳定性，其中20 g·L^-1的蔗糖水溶液可将保留率提升至119.48%;而食盐、苯甲酸钠和山梨酸钾均会降低其稳定性。

本文介绍了诺贝尔化学奖得主、德国化学家卡尔∙齐格勒(Karl Ziegler)的科研历程及贡献以纪念他逝世50周年。Ziegler对科学的热情、独特的思维和卓越的实验能力奠定了他的科学基础。他专注于自由基化合物、多元环化合物和有机金属化合物的研究，他与朱利奥∙纳塔共同发明命名的Ziegler-Natta催化剂对全球聚烯烃工业产生深远影响，造就了上千亿美元的市场。

以1，1′-二甲基-4，4′-联吡啶(甲基紫精，MV)二氯化物和Keggin型多酸单元合成的晶态材料(MV)₂[HPW^Ⅴ₂W^Ⅵ₁₀O₄₀]·2H₂O为催化剂，在无有机溶剂、室温条件下合成了一系列β-氨基醇类化合物。该催化剂不仅能够高效催化β-氨基醇的合成，而且具有良好的稳定性及可回收性。经过6次循环使用后，催化剂活性未出现明显下降，表明其具有较好的循环利用潜力。与传统方法相比，该反应体系不使用有机溶剂并具有反应条件温和、操作简单、环境友好等优点。

Two new viologen-polyoxometalate hybrid crystalline materials: (MV)₂[HPW₂^ⅤW₁₀^ⅥO₄₀] ·2H₂O (1) and (EV)₂[Mo₈O₂₆] (2) have been synthesized by using the cations of 1, 1'-dimethyl-4, 4'-bipyridinium dichloride (methyl viologen, MV) and 1, 1'-diethyl-4, 4'-bipyridinium dibromide (ethyl viologen, EV) as the electron acceptors, and the electron-rich polyoxometalate anions as the electron donors. The structures of compounds 1 and 2 have been determined by single-crystal X-ray crystallography. Hydrogen bond interactions exist between the cations and the anions in 1 and 2. Interestingly, 2 has a photochromic performance with a light response time within 1 min. The photochromic mechanism of compound 2 has been investigated by solid-state diffuse reflection, electron paramagnetic resonance and theoretical calculation. 1 and 2 show good catalytic performance in the photocatalytic degradation of several organic dyes (methylene blue, pararosaniline hydrochloride and rhodamine 6G).

Under the condition of solvothermal synthesis, the viologen ligand 1, 1′‐bis(3‐carboxyphenyl)‐(4, 4′‐bipyri‐ dine) dichloride (H₂bcbpy·2Cl) and KI are coordinated with the metal cadmium ions. A case of thermochromic coor‐ dination polymer [Cd(bcbpy)I₂] ·2H₂O (1) was constructed. Complex 1 displays a 1D chain structure and exhibits thermochromic behavior. Under different temperature stimulation, the complex (ground) slowly changed from green to yellow‐green, and with the increase of temperature, the color of complex 1 gradually deepened, and finally became orange‐yellow. Therefore, complex 1 was prepared as a thermochromic film. In addition, we also performed electrochemical tests on complex 1, which showed that the complex is a semiconductor material.

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.