大学化学 >> 2022, Vol. 37 >> Issue (7): 2110084.doi: 10.3866/PKU.DXHX202110084

化学实验 上一篇    下一篇

苯并三氮唑基乙酸HOF的制备及质子导电性能研究——推荐一个绿色综合化学实验

孟祥茹, 余一泓, 江远帆, 刘宇阳, 李纲()   

  • 收稿日期:2021-10-26 录用日期:2021-11-26 发布日期:2021-12-20
  • 通讯作者: 李纲 E-mail:gangli@zzu.edu.cn
  • 作者简介:李纲, Email: gangli@zzu.edu.cn
  • 基金资助:
    国家自然科学基金(22071223);国家大学生创新创业训练计划(202010459001)

Study on the Preparation and Proton Conductivity of a Benzotriazolyl Acetic Acid-Based HOF: Recommendation of a Green Comprehensive Chemistry Experiment

Xiangru Meng, Yihong Yu, Yuanfan Jiang, Yuyang Liu, Gang Li()   

  • Received:2021-10-26 Accepted:2021-11-26 Published:2021-12-20
  • Contact: Gang Li E-mail:gangli@zzu.edu.cn

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摘要：

氢键有机框架(HOFs)是一类由有机构筑单元通过分子间氢键自组装而成的新型晶态固体材料，具有孔径可调、低密度、含有丰富氢键网络的结构特点，因而在质子导电研究领域备受关注。本实验切合该领域的研究前沿，以水为溶剂，采用一步法制备苯并三氮唑基乙酸HOF (简称HOF 1)，通过元素分析、红外光谱、粉末X射线衍射等手段对其组成和结构进行表征。之后采用交流阻抗法测试其在三种相对湿度(75%、85%以及98% RH)和60–100 ℃之间的质子导电率，进而通过计算活化能推断其质子导电机理。本实验难度适中，综合多种测试手段，可以使学生了解质子导电领域的研究前沿知识、激发科研兴趣，训练科研能力。

关键词: 氢键有机框架, 苯并三氮唑基乙酸, 绿色化学, 质子导电, 综合化学实验

Abstract:

Hydrogen-bonded organic frameworks (HOFs) is one of the new types of crystalline solid materials composed by organic building units through the intermolecular hydrogen bond (H-bond). They have attracted great attention in the field of proton conduction due to their characteristics of high crystallinity, adjustable pore size, low density, abundant and dense H-bonds. In line with the current research frontier, we prepared benzotriazolyl acetic acid-based hydrogen-bonded organic framework (HOF 1) through one-step method in water and determined its composition and structure by means of elemental analysis, infrared spectrum and powder X-ray diffraction. Then, its proton conductivity was measured at three relative humidity (75%, 85% and 98% RHs) and different temperature (60?100 ℃) by alternating current impedance method. The proton conduction mechanism can be deduced by calculation of activation energy. This chemistry experiment is appropriate in difficulty and its testing methods are diversified, which enables the students to know a scientific research frontier, improve their interests in scientific research and stimulate their enthusiasm for scientific research, thus increase their confidence in scientific research in the future.

Key words: Hydrogen-bonded organic framework, Benzotriazolyl acetic acid, Green chemistry, Proton conduction, Comprehensive chemistry experiment