Issue 3, 2023

Room-temperature bistability in a cobalt-octacyanidotungstate framework showing a charge-transfer phase transition with a red-blue color change

Abstract

A two-dimensional cyanido-bridged Co–W assembly, Cs+0.1(H5O2+)0.9 [Co(4-bromopyridine)2.3{W(CN)8}], was synthesized. This compound has a layer structure with H5O2+ and Cs+ ions in between the cyanido-bridged Co–W coordination sheets, and exhibits a charge transfer–induced phase transition between CoII–WV (red) and CoIII–WIV (blue) states with a drastic color change. Upon cooling, the phase transition from the CoII–WV state to the CoIII–WIV state occurs at 276 K, while the opposite transition from the CoIII–WIV state to the CoII–WV state occurs upon heating at 329 K. The present compound shows a large thermal hysteresis loop with a width of 53 K and bistability at room temperature. Analysis of the thermal phase transition using the Slichter–Drickamer model reveals the thermodynamic parameters of the transition enthalpy, transition entropy, and interaction parameter.

Graphical abstract: Room-temperature bistability in a cobalt-octacyanidotungstate framework showing a charge-transfer phase transition with a red-blue color change

Supplementary files

Article information

Article type
Research Article
Submitted
31 Oct 2022
Accepted
19 Dec 2022
First published
21 Dec 2022

Inorg. Chem. Front., 2023,10, 850-859

Room-temperature bistability in a cobalt-octacyanidotungstate framework showing a charge-transfer phase transition with a red-blue color change

K. Nakamura, K. Nakabayashi, K. Imoto and S. Ohkoshi, Inorg. Chem. Front., 2023, 10, 850 DOI: 10.1039/D2QI02321K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements