Issue 12, 2022

Sequential enhancement of proton conductivity by aliovalent cadmium substitution and post-synthetic esterolysis in a carboxylate-functionalized indium framework with dimethylaminium templates

Abstract

A sequential improvement strategy has been devised and implemented on a 3D open framework In-BQ showing 2D intersected channels filled by dimethylamine and its protonated cation constructed by –COOCH3–functionalized anilicate linkers. In situ aliovalent metal substitution and post-synthetic ligand esterolysis led to Cd-BQ-COOH with a doubling of Me2NH2+ carriers and a great number of residual –COOH groups, resulting in maximum proton concentration and frequent jumping sites. As a result, the modified Cd-BQ-COOH exhibits a 300-fold enhanced value of proton conductivity compared with that of pristine In-BQ, reaching 6.06 × 10−2 S cm−1. MD calculations reveal that the entire process of proton transportation in Cd-BQ-COOH is achieved by the vehicle mechanism.

Graphical abstract: Sequential enhancement of proton conductivity by aliovalent cadmium substitution and post-synthetic esterolysis in a carboxylate-functionalized indium framework with dimethylaminium templates

Supplementary files

Article information

Article type
Research Article
Submitted
22 feb. 2022
Accepted
29 apr. 2022
First published
30 apr. 2022

Inorg. Chem. Front., 2022,9, 2997-3002

Sequential enhancement of proton conductivity by aliovalent cadmium substitution and post-synthetic esterolysis in a carboxylate-functionalized indium framework with dimethylaminium templates

H. Gao, Y. Wang, Y. He and X. Zhang, Inorg. Chem. Front., 2022, 9, 2997 DOI: 10.1039/D2QI00407K

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