Issue 2, 2023

Anomalous thermal expansion of strontium squarate trihydrate induced by hydrogen-bond weakening

Abstract

Blending of various chemical bonds with different strengths within a framework is expected to induce some anomalous physical properties. Herein, a novel metal squarate framework containing covalent bonds, coordination bonds and hydrogen bonds was synthesized and it showed a uniaxial negative thermal expansion (NTE). A combination of in situ powder/single-crystal X-ray diffraction, Raman spectroscopy and density-functional theory (DFT) calculations revealed that this anomalous thermal expansion originates from a hydrogen bond-triggered wine-rack-like distortion. This study can provide a new strategy for the rational design of hybrid NTE compounds.

Graphical abstract: Anomalous thermal expansion of strontium squarate trihydrate induced by hydrogen-bond weakening

Supplementary files

Article information

Article type
Research Article
Submitted
24 Oct 2022
Accepted
23 Nov 2022
First published
23 Nov 2022

Inorg. Chem. Front., 2023,10, 552-557

Anomalous thermal expansion of strontium squarate trihydrate induced by hydrogen-bond weakening

Z. Liu, Z. Wang, C. Xing, J. Tian and X. Xing, Inorg. Chem. Front., 2023, 10, 552 DOI: 10.1039/D2QI02274E

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