Negative thermal expansion in cubic FeFe(CN)6 Prussian blue analogues

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
View graph of relations

Author(s)

  • Naike Shi
  • Qilong Gao
  • Andrea Sanson
  • Qiang Li
  • Longlong Fan
  • Luca Olivi
  • Jun Chen
  • Xianran Xing

Detail(s)

Original languageEnglish
Pages (from-to)3658-3663
Journal / PublicationDalton Transactions
Volume48
Issue number11
Publication statusPublished - 21 Mar 2019
Externally publishedYes

Abstract

Negative thermal expansion (NTE) behavior is an interesting physical phenomenon, but the number of NTE materials is limited. In this study, a new NTE compound has been found, FeFe(CN)6 Prussian blue analogue, where the average linear coefficient of thermal expansion (αl) is -4.260 × 10-6 K-1 between 100 and 450 K. The NTE properties and local vibration dynamics have been investigated by joint experiments of synchrotron X-ray diffraction, X-ray pair distribution function, and extended X-ray absorption fine structure spectroscopy. It has been observed that the Fe-C/Fe-N bonds expand with increasing temperature, while the unit cell shrinks in FeFe(CN)6. The vibration directions of both Fe-C and Fe-N prefer to be perpendicular to the linkage of Fe-CN-Fe rather than being parallel. More pieces of evidence indicate that the transverse vibrations of N atoms dominate the NTE behavior of FeFe(CN)6. The present results prove directly that the transverse thermal vibrations of C and N atoms are crucial for the occurrence of the NTE of Prussian blue analogues.

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Negative thermal expansion in cubic FeFe(CN)6 Prussian blue analogues. / Shi, Naike; Gao, Qilong; Sanson, Andrea; Li, Qiang; Fan, Longlong; Ren, Yang; Olivi, Luca; Chen, Jun; Xing, Xianran.

In: Dalton Transactions, Vol. 48, No. 11, 21.03.2019, p. 3658-3663.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review