A Preyssler-type polyoxometalate-based coordination supramolecule with proton conducting property
| Autor: | Ke Li, Sai Sun, Yangguang Li, Li-Jie Zhu, Bo Li, Hong-Ying Zang, Yong-Hui Wang, Dongming Cheng |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry Hydrogen bond Chemistry Crystal structure Conductivity 010402 general chemistry 01 natural sciences 0104 chemical sciences Coordination complex Inorganic Chemistry Crystallography Deprotonation Polyoxometalate Materials Chemistry Physical and Theoretical Chemistry Single crystal Powder diffraction |
| Zdroj: | Polyhedron. 169:84-88 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2019.04.058 |
| Popis: | Developing new low-cost and efficient proton-conducting materials remains an attractive and challenging task. Herein, a Preyssler-type polyoxometalate derived coordination compound had been synthesized with a hydrothermal method, namely, H4.5NaCo5(2-MI)15.5(2-MI)3 [NaP5W30O110]·5H2O (1) (where 2-methylimidazole is abbreviated as 2-MI, and partial 2-MI was deprotonated). The structure was characterized by single crystal X-ray diffraction, PXRD, FT-IR, TG, CHN and ICP-OES elemental analyses. We studied the relationship between the crystal structure and proton conduction of compound 1 and found that the presence of 2-MI reduced the leakage of polyoxometalate under high relative humidity. Meanwhile, the strong interaction of the counter cation Na+ with water is beneficial to form more hydrogen bonds. Compound 1 showed the maximum proton conductivity with a value of 4.42 × 10−3 S cm−1 at 367 K and 97% RH. Kinetic investigation indicates that the proton conduction mechanism of compound 1 follows the vehicle mechanism. |
| Databáze: | OpenAIRE |
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