A supramolecular complex based on poly-Keggin-anion chains: synthesis, structure characterization, and conductivity

作者：Wei, Mei-Lin^*; Li, Hui-Hua; Wang, Xiao-Xiang; Wang, Jun-Hua

来源：Structural Chemistry, 2012, 23(1): 129-136.

DOI：10.1007/s11224-011-9790-3

• Polyoxometalates
• Crystal structure
• Supramolecular complex
• Hydrogen bond
• Conducting material

A proton-conductive supramolecular complex, {[Cu(H2O)(8)][H(H2O)(3)](HINO)(4)(PMo12O40)} (n) , was constructed by a self-assembly of H+(H2O)(3) clusters, [Cu(H2O)(8)](2+) clusters, [PMo12O40](3-) anions, and isonicotinic acid N-oxide (HINO). Single-crystal X-ray diffraction analysis at 293 K revealed that the complex presented the three-dimensional (3D) supramolecular framework built from non-covalent interactions. Interestingly, [PMo12O40](3-) anions self-assembled into poly-Keggin-anion chains in the supramolecular framework. Thermogravimetric analysis shows no weight loss in the temperature range of 20-100 A degrees C, indicating that all water molecules in the unit structure are not easily lost below 100 A degrees C. Surprisingly, the proton conductivity of the complex in the temperature range of 85-100 A degrees C under 98% RH condition reached good proton conductivity of 10(-3) S cm(-1). A possible mechanism of the proton conduction was proposed according to the experimental results.

• 出版日期2012-2
• 单位河南师范大学