Multifunctional Chiral Three-Dimensional Phosphite Frameworks Showing Dielectric Anomaly and High Proton Conductivity

S S Yu; C Y Xu; X Pan; X Q Pan; H B Duan; H Zhang

doi:10.3389/fchem.2021.778687

Multifunctional Chiral Three-Dimensional Phosphite Frameworks Showing Dielectric Anomaly and High Proton Conductivity

Front Chem. 2021 Dec 9:9:778687. doi: 10.3389/fchem.2021.778687. eCollection 2021.

Authors

S S Yu¹, C Y Xu¹, X Pan¹, X Q Pan¹, H B Duan¹, H Zhang^{1

2}

Affiliations

¹ School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, China.
² Key Laboratory of Advanced Functional Materials of Nanjing, Nanjing Xiaozhuang University, Nanjing, China.

Abstract

Chair 3D Co(II) phosphite frameworks have been prepared by the ionothermal method. It belongs to chiral space group P3₂21, and the whole framework can be topologically represented as a chiral 4-connected qtz net. It shows a multistep dielectric response arising from the reorientation of Me₂-DABCO in the chiral cavities. It can also serve as a pron conductor with high conductivity, 1.71 × 10^-3 S cm^-1, at room temperature, which is attributed to the formation of denser hydrogen-bonding networks providing efficient proton-transfer pathways.

Keywords: dielectric response; ionothermal method; molecular motions; phosphite frameworks; pron conductor.