Construction of Strandberg‐Type Polyoxometalate‐Based Inorganic‐Organic Hybrid Material with Water‐Assisted Proton Conductivity. Issue 20 (26th May 2020)

• Record Type: Journal Article
• Authors: Wang, Jia–Xuan; Liang, Song; Tan, Huaqiao; Wang, Yong–Hui; Zang, Hong–Ying; Li, Yang–Guang
• Is Part Of: ChemistrySelect. Volume 5:Issue 20(2020)
• Page Start: 5883
• Page End: 5888
• Publication Date: 2020-05-26
• Subjects: polyoxometalates -- proton conduction -- crystal structure -- hydrogen bonding -- activation energy; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202000169
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Polyoxometalates (POMs) were widely applied in the field of proton conduction due to their rapid charge transfer capability and large proton capacity. The Strandberg‐type POM has small size and large charge density, can form functional organometallic compounds with metal ions. In this study, by using [P2 Mo5 O23 ] 6− coordinate with the cobalt ion with cytosine as the structure‐directing agent, a compound of Co1.5 (C4 H6 N3 O)3 [P2 Mo5 O23 ]⋅8.5H2 O was synthesized, which showed one‐dimensional chain structure and exhibits proton conductivity of 3.62 × 10 −4 S cm −1 at 98 °C and 97% RH. The amino group and nitrogen atoms in the cytosine can form hydrogen bond with the coordination water molecules. Meanwhile, the hydrogen bond network can also be formed between the water molecules, which is one of the main factors for proton conduction performance. The compound Co1.5 (C4 H6 N3 O)3 [P2 Mo5 O23 ]⋅8.5H2 O exhibited the corresponding activation energies and conduction mechanisms at different temperature intervals, by analyzing the temperature‐dependent PXRD spectrum under high‐humidity conditions, which showed the hydrogen bond network of the crystal during the temperature changes affects its proton conduction performance. Abstract : Inorganic‐organic hybrid material as a solid electrolyte. {P2 Mo5 }‐based coordination polymer with Co 2+ exhibits good proton conductivity with 3.62 × 10 −4 S cm −1 . Rearrangement of the hydrogen bond network allows the sample to have different activation energies at different temperatures.