Structure property relationships affecting the proton conductivity in imidazole loaded Al-MOFs.
Structure property relationships affecting the proton conductivity in imidazole loaded Al-MOFs.
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DOI：
10.1039/c6dt03048c
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发表时间：
2016-09
影响因子：
4
通讯作者：
T. Homburg;C. Hartwig;H. Reinsch;M. Wark;N. Stock
中科院分区：
文献类型：
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作者：
T. Homburg;C. Hartwig;H. Reinsch;M. Wark;N. Stock
由粉末X射线衍射数据确定了Al-MIL-53 [Al（OH）（1，4-BDC-（CH 3）x）]（x = 0，1，2）和CAU-11（[Al（OH）（SDBA）]）（1，4-H2 BDC =对苯二甲酸; H2SDBA = 4，4 '-磺酰基二苯甲酸）的咪唑负载衍生物的结构。进行阻抗谱测量以评估它们在无水条件下在高达110 °C的温度下的质子传导率。In Al-MIL-53-（CH3）x_HIm（x = 0，1，2）骨架和客体分子之间氢键的形成导致质子传导率的降低（对于0、1和2个CH 3-基团，在110 °C下x 0 = 1.7 × 10-6，x1 = 1.9 × 10-8和x2 = 1.7 × 10-9 S cm-1，Eact = 0.42、0.41和0.46 eV）。CAU-11_HIm在110 °C（Eact = 0.19 eV）下测得的最高电导率为3.0 × 10-4 S cm-1，其中没有观察到主体-客体氢键相互作用。
The structures of the imidazole loaded derivatives of Al-MIL-53 [Al(OH)(1,4-BDC-(CH3)x)] (x = 0, 1, 2) and CAU-11 ([Al(OH)(SDBA)]) (1,4-H2BDC = terephthalic acid; H2SDBA = 4,4'-sulfonyldibenzoic acid) were determined from powder X-ray diffraction data. Impedance spectroscopy measurements were carried out to evaluate their proton conductivities under anhydrous conditions at temperatures up to 110 °C. In Al-MIL-53-(CH3)x_HIm (x = 0, 1, 2) the formation of hydrogen bonds between the framework and the guest molecules results in a decrease in proton conductivity (x0 = 1.7 × 10-6, x1 = 1.9 × 10-8 and x2 = 1.7 × 10-9 S cm-1 at 110 °C and Eact = 0.42, 0.41 and 0.46 eV, for 0, 1 and 2 CH3-groups, respectively). The highest conductivity has been measured for CAU-11_HIm with 3.0 × 10-4 S cm-1 at 110 °C (Eact = 0.19 eV), where no host-guest hydrogen bonding interactions are observed.