Electrochromic 2,5-Dihydroxyterephthalic Acid Linker in Metal-Organic Frameworks

23 March 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

We report electrochromism of M-MOF-74 (M=Mg, Mn, Co or Zn), a honeycomb nano-framework in which hexagonally packed one-dimensional
arrays of metal cations are coordinated with 2,5-Dihydroxyterephthalic acid linker. Raman spectroscopy upon electrochemical doping combined with density functional theory calculations reveals redox reactions of the linker while the metal cations stay divalent as
probed by X-ray photoemission spectroscopy. Excellent adhesion of the MOFs to glass allows synthesis of quality thin films to be implemented into electrochromic devices that exhibit promising colour contrast and durability.

Keywords

Electrochromism
Metal-organic frameworks
Spectroelectrochemisrty

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