title: The First Demonstration of the Gyroid in a Polyoxometalate-Based Open Framework with High Proton Conductivity.
abstract: The fabrication of extended open frameworks with crystalline ordering on the atomic level by following peculiar mathematical geometry (e.g. Möbius band, Klein bottle, periodic minimal surfaces, etc.) is challenging, but extremely beneficial for discovering non-trivial structure-dependent properties. In light of this, we herein report the first polyoxometalate-based open framework (POM-OF) that definitely lies on the gyroid (G)-minimal surface, which was constructed by a rare pair of chiral POM enantiomers and zinc ions. Due to the presence of the proton carriers (i.e., water, Na(+) , [(Bu)4 N](+) , etc.) in the resultant gyroidal channels, with pore dimensions on the order of the quasi-mesoporous scale, this compound shows a high proton conductivity of 1.04×10(-2)  S cm(-1) at a relative humidity of 75 % (80 °C), and also exhibits enormous potential in the application of electrochemical catalysis.
authors.affiliation: TKL of Metal- and Molecule-Based Material Chemistry, School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, P. R. China.|State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gao
authors.affiliation: Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China.
authors.forename: Xiu-Li
authors.initials: XL
authors.lastname: Wang
authors.affiliation: TKL of Metal- and Molecule-Based Material Chemistry, School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, P. R. China. jxu@nankai.edu.cn.|State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China. jxu@nankai.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.affiliation: TKL of Metal- and Molecule-Based Material Chemistry, School of Materials Science and Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300350, P. R. China. buxh@nankai.edu.cn.|State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China. buxh@nankai.edu.cn.
authors.forename: Xian-He
authors.initials: XH
authors.lastname: Bu
keywords: electrocatalysis; gyroid minimal surface; novel topology; polyoxometalates; proton conduction