A Mini-Review: Pyridyl-Based Coordination Polymers for Energy Efficient Electrochromic Application

Abstract

Electrochromic devices (ECDs) have a broad range of application prospects in many important energy efficient optoelectronic fields, such as smart windows, anti-glare rearview mirrors, low-energy displays, and infrared camouflage. However, there are some factors restricting their development, such as low coloration efficiency, slow switching speed, and poor cycling stability. Coordination polymer (CP) is a promising active material for the fabrication of high-performance ECD because of its ultrahigh coloration efficiency, fast switching speed, and excellent cycling stability. In this review, current advances of CP in energy efficient ECDs are comprehensively summarized and evaluated. Specifically, the effects of composition, coordination bonding, and microstructure of the bipyridine- and terpyridine-based CP on EC performances are introduced and discussed in detail. Then, the challenges and prospects of this booming field are proposed. Finally, the broad application prospects of the CPs-based EC materials and the corresponding devices are also demonstrated, which hold numerous revolutionary effects over our daily life. Hopefully, this review would provide useful guidance and further promote progress on the electrochromic and other optoelectronic fields.

Crystal structure of catena-poly[[[bis(1-benzylimidazole-κN)copper(II)]-μ-sulfato-κ2 O:O′-[tetrakis(1-benzylimidazole-κN)copper(II)]-μ-sulfato-κ2 O:O′] N,N-dimethylformamide disolvate dihydrate]

“…The exploration of new transition-metal coordination polymers (CPs) is still an ongoing process since this class of molecular materials presents interesting properties and potential applications in adsorption, catalysis, storage, and photoluminescent sensing (Engel & Scott, 2020;Liu et al, 2021;Baruah, 2022;Ma & Horike, 2022). For the design and synthesis of new CPs, metal ions and bridging ligands play an important role, because they influence structural topologies, dimensionalities, and possible functions (Du et al, 2013).…”

3d Magnetic Chains with an Asymmetrical Pyridyl-Triazole Ligand. Influence of Coordination and Local Distortion in the Ligand Field and Magnetometry

“…Coordination polymers (CPs) are extensively studied in diverse fields, such as electrical conduction, gas absorption, magnetism, and luminescence. − Moreover, among all CPs, low-dimensional 1D structures display promising properties in electronics, chiral, absorbent, and catalytical materials …”

Compositionally Controlled Electron Transfer in Metallo-Organics

“…Electron hopping and more recently a “stepping-stone mechanism” (=modified tunneling process) were proposed. , Assemblies having reversible electron transfer to unidirectional current flows and even charge trapping have been demonstrated . Reversible changes in the metal oxidation state, along with concurrent large variations in their light absorption efficiency, have resulted in potentially useful electrochromic coatings. , Electrocatalysis, sensing, and antibacterial properties have been reported as well as supercapacitors, electrochromic devices, and inverted solar cells. − Such films have also been shown to mimic the characteristics of conventional electronic circuits, including flip-flops. , The functionalities of metal–organic films can be controlled by sequence-dependent assembly, that is, depositing nanoscale layers consisting of isostructural complexes with different metal cations. ,, …”