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:	Lanthanide Solid-state chemistry Materials science 010405 organic chemistry Hydrogen bond Coordination number Protonation 010402 general chemistry 01 natural sciences 0104 chemical sciences Proton transport Polyoxometalate Physical chemistry Molecule General Materials Science
Zdroj:	ACS Applied Materials & Interfaces. 13:19138-19147
ISSN:	1944-8252 1944-8244
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:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f52d6a5cf0a62bcb56f9a367ab628baf https://doi.org/10.1021/acsami.1c01752 Zobrazit plný text záznamu