荧光“变色龙”——基于动态发光的科普实验方案
衣梓硕, 刘鹏, 徐燕
【大学化学】doi: 10.12461/PKU.DXHX202311079
制备无毒的ZnGa2O4:Bi3+荧光材料,其同时具备可调多色荧光、动态光致变色及热致变色的三模式发光性质。我们利用这种类似“变色龙”的荧光特性设计了三种信息安全实施方案,实验互动性强且具有趣味性,有良好的科普实践展示效果,有助于激发学生对化学学科的学习热情,进而帮助青少年体会“美丽化学”的丰富内涵。
关键词: 动态荧光, 光致变色, 热致变色, 科普实验, 防伪
超分子聚合物“变色龙”在创新型化学实验中的探索
高昭, 孙健翔, 慕斌, 闫毅, 田威
【大学化学】doi: 10.12461/PKU.DXHX202504044
本文进行了具有气致变色特性的蒽环基超分子聚合物材料在创新型化学实验中的初探。利用该材料所制备的“变色龙”图案在固态时呈现橙红色荧光,在特定蒸气作用下迅速响应变为黄色或绿色荧光。实验设计涵盖超分子聚合物材料制备、荧光表征以及蒸气响应测试,将超分子化学中的分子识别与刺激响应原理融入实践教学。学生可通过直观的荧光变色现象观察,结合光谱数据解析,深入理解智能材料的结构-性能关系。本研究将学科前沿与基础实验相结合,有效强化学生的综合实验技能和创新能力。
关键词: 超分子聚合物, 气致变色, 响应性, 选择性, 化学综合实验
Synthesis, structure, and electrocatalytic oxygen reduction reaction properties of metal antimony-based chalcogenide clusters
Xiaoxia WANG, Ya'nan GUO, Feng SU, Chun HAN, Long SUN
【无机化学学报】doi: 10.11862/CJIC.20230478
To explore the diversity of structure and optoelectronic applications of metal chalcogenide cluster materials, two Sb-based chalcogenide cluster compounds [Sb4S5(S3)]·C5H11N (1) and (C5H12N)2[In2Sb2S7] (2) have been synthesized through solvothermal method using asymmetric coordination geometry with Sb(Ⅲ) containing lone pair electrons and sulfur. The two compounds consist of combinations between {SbS3} or {InS4} coordination units in a vertex-sharing manner, respectively. The electrocatalytic oxygen reduction reaction (ORR) studies showed that the limit current density and half-wave potential of compound 2 were higher than those of compound 1, indicating better ORR performance. The Koutecky-Levich plot analysis showed that the ORR catalytic process of layered compound 2 constructed from mixed metals is mainly through a four-electron pathway.
关键词: metal sulfide, cluster chemistry, crystal structure, oxygen reduction reaction

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