Crystal Structures and Conductivities of Two Organic–Inorganic Hybrid Complexes Based on Poly‐Keggin‐Anion Chains

Autor: Mei‐Lin Wei, Hui‐Hua Li, Yun‐Hui Yang, P. F. Zhuang
Rok vydání: 2011
Předmět:
Zdroj: European Journal of Inorganic Chemistry. 2011:1473-1478
ISSN: 1099-0682
1434-1948
DOI: 10.1002/ejic.201001144
Popis: Two proton-conducting organic–inorganic hybrid complexes have been constructed by the self-assembly of protonated water clusters, transition-metal aqua ions, [PMo12O40]3– anions and isonicotinic acid N-oxide (HINO). Single-crystal X-ray diffraction analyses at 293 K revealed that both complexes presented exactly the same three-dimensional supramolecular framework built from non-covalent interactions. Interestingly, the [PMo12O40]3– anions self-assembled into poly-Keggin-anion chains in the supramolecular frameworks. Thermogravimetric analyses showed no weight loss for either system in the temperature range of 20–100 °C, which indicates that none of the water molecules in the unit structure are easily lost below 100 °C. Surprisingly, the proton conductivities of 1 and 2 in the temperature range of 85–100 °C under 98 % relative humidity reached good proton conductivities of 10–3 S cm–1. A possible mechanism for the proton conduction in accord with experimental results is proposed.
Databáze: OpenAIRE
Externí odkaz: