title: Synthesis of a Ternary Thiostannate with 3D Channel Decorated by Hydronium for High Proton Conductivity.
abstract: Metal chalcogenides with various channel structures feature a number of interesting properties including fast-ion conductivity and selective ion exchange. Most of these compounds are popularly prepared based on the templates of organic amines that play the part of a structure directing agent and even structure-building units, while it still remains a challenge as to the organotemplate-free synthesis for these compounds. Here, a new ternary thiostannate (H3O)4Cu8Sn3S12was synthesized through a facile, efficient, and organotemplate-free route under hydrothermal conditions. The framework of (H3O)4Cu8Sn3S12consists of [Cu8Sn6S24]8-building units and possesses a 3D interconnected 8-ring channel structure decorated by pure hydroniums, which not only balance the charges but also facilitate the proton conductivity. The proton conductivity reaches as high as 1.03 × 10-3S cm-1at 393 K under anhydrous conditions, which is 2 orders of magnitude higher than that of (H3O)2(enH2)Cu8Sn3S12, a similar channel structure compound prepared by using ethylenediamine as an organic template.
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130000, P. R. China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130000, P. R. China.
authors.forename: Guangshe
authors.initials: G
authors.lastname: Li
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130000, P. R. China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Peng
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun 130000, P. R. China.
authors.forename: Liping
authors.identifier: http://orcid.org/0000-0002-6732-4902
authors.initials: L
authors.lastname: Li