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Citation: Chanzi Ruan, Rui Pan, Zhenling Xu, Yuhua Weng, Chunyan Zhang, Yinyun Lü, Zhiqiang Dong, Yanping Ren. “元素化学实验”中的热致变色现象(一)——部分Co(II)化合物的热致变色现象及其变色机理探讨[J]. University Chemistry, ;2022, 37(1): 210400. doi: 10.3866/PKU.DXHX202104004 shu

“元素化学实验”中的热致变色现象(一)——部分Co(II)化合物的热致变色现象及其变色机理探讨

National Demonstration Center for Experimental Chemistry Education(Xiamen University), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, China

Corresponding author: Yanping Ren, ypren@xmu.du.cn
Received Date: 6 April 2021

以探讨Co²⁺鉴定实验过程中意外发现在适量CoCl₂溶液中加入适量NH₄SCN溶液的体系具有可逆热致变色现象为切入点，在分析和探讨其热致变色机理的基础上，顺势通过“先做后教、以做定教”实验教学的“翻转课堂”模式，即学生完成元素化学实验，具有亲身经历和切身体会后，以“问题”为导向，以生动直观的演示实验现象为基础，引导学生直观认识一些Co（II）化合物的热致变色现象及其影响因素，启发学生应用化学原理与化学知识解释和探讨热致变色现象产生的本质，以加深学生对配合物的结构、性质以及分裂能概念的理解，培养学生的观察、分析、判断、归纳、推理、总结和探索规律的能力以及“批判性”思维能力。
- Co(II) compounds,
- Thermochromism,
- Influencing factors,
- Discussion on thermochromic mechanism
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