Journal
CRYSTENGCOMM
Volume 24, Issue 33, Pages 5880-5884Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ce00878e
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Funding
- JSPS KAKENHI [JP22H05144, JP20K22554, JP21H01905]
- Cooperative Research Program of 'Network Joint Research Centre for Materials and Devices'. Kyushu Synchrotron Light Research Center (SAGA-LS) [2107066F, 2107067F, 2104032F]
- [JP21K18936]
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This article presents the unique thermal expansion behavior of a cyanide-bridged honeycomb layer material, including zero thermal expansion, in-plane anisotropy, and complementary structural changes in the cation and anion counterparts.
The zero area thermal expansion (TE) of a cyanide-bridged honeycomb layer was demonstrated by (PPh4)[Cu-2(CN)(3)] (PPh4+ = tetraphenyl phosphonium) via double distortion relaxation. This characteristic TE behaviour involves in-plane anisotropy of the distorted layer with positive and negative TE. The conformation change in distorted PPh4+ tetrahedrons also occurred between the layers. This was coupled with the anisotropic TE of the layers in accordance with complementary structural changes in the cation and anion counterparts.
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