Inorganic Chemistry Laboratory Experiment on the Zeolitic Imidazolate Framework ZIF-8, a Typical Example of Metal Organic Framework

Umit B. Demirci, Laurent Bernaud
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Abstract

Because our undergraduate chemistry students hear about metal organic frameworks (MOF) within the plan of the teaching units dedicated to inorganic chemistry and coordination chemistry, we initiated in 2017-2018 an inorganic chemistry laboratory experiment aimed at third-year undergraduate students (7 sessions of 4 h each). The laboratory focuses on the synthesis and analysis of the ZIF-8, a well-documented and easy-to-synthesize MOF. Students are introduced to coordination chemistry, MOFs, solvothermal synthesis, analysis techniques (scanning electron microscopy, X-ray diffraction, Fourier transform infra-red spectroscopy, thermogravimetric analysis), and 3D visualization of the structural models of crystalline solids. Prior to any discussion with the instructor, the students are strongly encouraged to analyze their collected data based on the open literature, and it is expected that they will develop their autonomy. The students gain experimental independency. After the laboratory experiment, the students prepare a poster (2 dedicated sessions, of 4 h each), and present it during an oral examination (10 th session) in front of a jury of four instructors. In this way, they are assessed. We believe that this inorganic chemistry laboratory experiment could be adopted by other laboratories as it is, or in an adapted form. Some suggestions to adapt it are made.
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典型金属有机骨架ZIF-8分子筛咪唑酸骨架的无机化学室内实验
由于我们本科化学专业的学生在无机化学和配位化学专业教学单位的计划中听说了金属有机框架(MOF),我们在2017-2018年针对本科三年级学生开展了无机化学实验室实验(7次,每次4小时)。实验室专注于ZIF-8的合成和分析,这是一种记录良好且易于合成的MOF。向学生介绍配位化学,mof,溶剂热合成,分析技术(扫描电子显微镜,x射线衍射,傅立叶变换红外光谱,热重分析),以及晶体固体结构模型的3D可视化。在与导师进行任何讨论之前,强烈鼓励学生根据公开文献分析他们收集的数据,并期望他们能够发展自己的自主性。学生们获得了实验的独立性。实验结束后,学生们准备一张海报(2次,每次4小时),并在口试(第10次)中向4名教师组成的评委会提交。通过这种方式,他们被评估。我们相信,这个无机化学实验室实验可以被其他实验室照旧采用,或者以一种改编的形式采用。提出了一些适应的建议。
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