Issue 48, 2022

In-situ Raman spectroscopic insight into charge delocalization-improved electrical conductivity in metal–cyanide frameworks

Abstract

Porous crystalline materials (PCMs) have attracted widespread attention due to their high porosity and chemical tunability. To solve the problem of the low electrical conductivity of traditional PCMs, a guest-promoted approach has been developed to impart electrical conductivity, whereas microscopic understanding of this process from experiments is largely lacking. Here we use in-situ electrochemical surface-enhanced Raman spectroscopy (EC-SERS) to investigate the microscopic mechanism of the enhanced electrical conductivity in metal–cyanide frameworks, in Prussian Blue (PB), induced by alkali metal ions. The EC-SERS result demonstrates that the charge is localized around the iron atom in PB and becomes delocalized on the CN bond after insertion of the alkali metal ions, verified by density functional theory (DFT) calculations. The enhanced electrical conductivity of PCMs promoted by the guest via the through-bond mechanism instead of the through-space hopping mechanism in pristine PB, offers a new approach to develop conductive PCMs.

Graphical abstract: In-situ Raman spectroscopic insight into charge delocalization-improved electrical conductivity in metal–cyanide frameworks

Supplementary files

Article information

Article type
Paper
Submitted
26 Sep 2022
Accepted
25 Nov 2022
First published
28 Nov 2022

Nanoscale, 2022,14, 18184-18191

In-situ Raman spectroscopic insight into charge delocalization-improved electrical conductivity in metal–cyanide frameworks

Z. Lu, Y. Huang, L. Shao, M. Cao, S. Hu, C. Liu, X. Wang and B. Ren, Nanoscale, 2022, 14, 18184 DOI: 10.1039/D2NR05285G

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