在100°C以上的高质子导电,通过联接介导,在兰坦化金属有机框架中的联接
Qun Tang1, Yiwei Liu, Shuxia Liu
1Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
Journal of the American Chemical Society
|August 20, 2014
概括
这项研究揭示了一种化金属有机框架 (MOF),表现出高质子导电性,高达150°C. 该材料在再水后保持其结构和导电性,显示了先进应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
- 固态化学 固态化学
背景情况:
- 材料中的质子导电对于燃料电池等能源应用至关重要.
- 金属有机框架 (MOF) 为离子运输提供可调节的结构.
- 基于兰化物的MOF对质子导电性质的探索较少.
研究的目的:
- 为了合成和描述一种用于质子导电的新型兰坦化物MOF.
- 为了研究质子运输的机制和温度依赖性.
- 评估材料的稳定性和补水能力.
主要方法:
- 兰化物MOF的热水合成, [Eu2 (((CO3) ((ox) 2 ((H2O) 2) · 4H2O. 在
- 单晶X射线衍射用于结构确定.
- 测量可变温度导电性 (包括化样本) 和光发光学研究.
主要成果:
- 在高温 (150°C) 时,MOF显示出显著的质子导电性 (高达2.08 × 10−3 S cm−1).
- 证实了质子运输是不依赖于湿度的,主要沿着晶体学a轴通过与结合的水联体和酸盐群进行.
- 由于水联体损失,导电性在160°C以上下降,但MOF结构在350°C以上保持稳定,在再水后可恢复.
结论:
- 合成的胺MOF表现出优异的质子导电性,由激活的水联体驱动.
- 该材料表现出了显著的热稳定性和在再水后可逆的质子导电.
- 这种MOF为高温质子导电应用提供了一个有希望的候选.
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