Reversible four-color electrochromism triggered by the electrochemical multi-step redox of Cr-based metallo-supramolecular polymers

Abstract

Four color electrochromism (yellow, magenta, blue, and navy) has been achieved in Cr(iii)-based metallo-supramolecular polymers (polyCr), which were synthesized by 1 : 1 complexation of Cr ions and 1,4-di[[2,2′:6′,2′′-terpyridin]-4′-yl]benzene (L).

Electropolymerization of Thiophene‐Based Monomers with Different Spatial Structures: The Impact of Monomer Structure on Electrochromic Properties

“…[16][17][18][19] In recent years, various types of 3D p-conjugated structure molecules have appeared to be designed for various aspects, including molecular electronics, solar cell, field-effect transistors, optoelectronic materials for electroluminescent devices. [20][21][22][23][24] At present, the polymer chain design of PTh that in the field of electrochromism mainly around star-shaped and linear structures. [25][26][27] Zhang et al used linear thiophene monomers with different chain lengths to prepare polymers to explore the influence of the degree of conjugation on the electrochemical and EC properties of polymers.…”

Dynamic electrochromic play via “mix-and-match” reversible metal-ligand interactions

“…5 Moreover, Higuchi and co-workers reported on a terpyridine-based coordination polymer that demonstrates four different colors upon sequential switching between oxidation states of the Cr redox center. 10 The application of external potential to all of the abovementioned systems is used to change the oxidation state(s) of the metal center(s) affecting the energy-transfer processes and resulting in the color change(s) within the material, but it does not disrupt the metal-ligand coordination.…”