Ultrahigh Proton Conduction via Extended Hydrogen-Bonding Network in a Preyssler-Type Polyoxometalate-Based Framework Functionalized with a Lanthanide Ion
| Autor: | Naoki Ogiwara, Yuji Kikukawa, Sayaka Uchida, Sora Shirai, Tsukasa Iwano, R. John Errington, Satoru Ikemoto, Paul G. Waddell, Masanari Okuno, Masahiro Sadakane, Satoshi Muratsugu, Kota Shitamatsu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | ACS Applied Materials & Interfaces. 13:19138-19147 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c01752 |
| Popis: | The exploration of composition-structure-function relationship in proton-conducting solids remains a challenge in materials chemistry. Polyoxometalate-based compounds have been long considered as candidates for proton conductors; however, their low structural stability and a large decrease in conductivity under reduced relative humidity (RH) have limited their applications. To overcome such limitations, the hybridization of polyoxometalates with proton-conducting polymers has emerged as a promising method. Besides, 4f lanthanide ions possess a high coordination number, which can be utilized to attract water molecules and to build robust frameworks. Herein, a Preyssler-type polyoxometalate functionalized with a 9-coordinate Eu3+ (Eu[P5W30O110K]11-) is newly synthesized and combined with poly(allylamine) with amine moieties as protonation sites. The resulting robust crystalline composite exhibits an ultrahigh proton conductivity >10-2 S cm-1 at 368 K and 90% RH, which is still >10-3 S cm-1 at 50% RH, due to the strengthened and extended hydrogen-bonding network. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|