title: Steam-Assisted Synthesis of an Extra-Stable Polyoxometalate-Encapsulating Metal Azolate Framework: Applications in Reagent Purification and Proton Conduction.
abstract: Different from the conventional synthesis approaches, such as hydrothermal or solvothermal synthesis, a porous metal azolate framework encapsulating Keggin-type [SiW12 O40 ](4-) anions was prepared by an environmentally friendly, low-cost, and highly efficient steam-assisted conversion method for the first time. The nanosized polyoxometalates as a template were encapsulated by a zeotype 6(4) 4(8) cage constructed by 28 nuclear zinc atoms connected through 32 Trz ligands. The obtained composite exhibits excellent thermal and chemical stability; meanwhile, its special ability to selectively absorb water from alcohols makes it efficiently separate water from analytically pure ethanol, with the result that water content decreases from 0.23 to 0.05 wt %, which is superior to the standard of chromatographic grade ethanol (<0.1 wt %). Besides, alternating current (ac) impedance experiments also reveal that the hybrid is a kind of proton conductive material.
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education, Institute of Functional Material Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024 (P.R. China).
authors.forename: En-Long
authors.initials: EL
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education, Institute of Functional Material Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024 (P.R. China).
authors.forename: Chao
authors.initials: C
authors.lastname: Qin
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education, Institute of Functional Material Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024 (P.R. China). wangxl824@nenu.edu.cn.
authors.forename: Xin-Long
authors.initials: XL
authors.lastname: Wang
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education, Institute of Functional Material Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024 (P.R. China).
authors.forename: Kui-Zhan
authors.initials: KZ
authors.lastname: Shao
authors.affiliation: Key Laboratory of Polyoxometalate Science of Ministry of Education, Institute of Functional Material Chemistry, Department of Chemistry, Northeast Normal University, Changchun, Jilin, 130024 (P.R. China). zmsu@nenu.edu.cn.
authors.forename: Zhong-Min
authors.initials: ZM
authors.lastname: Su
keywords: Adsorption; metal-organic frameworks; nanostructures; polyoxometalates; synthetic methods