An Electrochromic Hydrogen‐Bonded Organic Framework Film

Feng, Jifei; Liu, Tian‐Fu; Cao, Rong

doi:10.1002/anie.202006926

Cited by 120 publications

(101 citation statements)

References 52 publications

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“…On the other hand, processable porous materials are always preferred for device applications, especially for wearable electronics [46–49] . Very recently, redox‐active microporous hydrogen‐bonded organic frameworks (HOFs) were reported as a new class of electrochromic materials [50] . Even though the processability is a unique advantage of HOF‐based materials, the development of suitable electroactive building units for hydrogen‐bonded supramolecular assembly is synthetically challenging.…”

Section: Discussionmentioning

confidence: 99%

Two‐dimensional Covalent Organic Frameworks for Electrochromic Switching

Sarkar

Dutta

Patra

2021

Chemistry An Asian Journal

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The electrochromic materials have received immense attention for the fabrication of smart optoelectronic devices. The alteration of the redox states of the electroactive functionalities results in the color change in response to electrochemical potential. Even though transition metal oxides, redox‐active small organic molecules, conducting polymers, and metallopolymers are known for electrochromism, advanced materials demonstrating multicolor switching with fast response time and high durability are of increasing demand. Recently, two‐dimensional covalent organic frameworks (2D COFs) have been demonstrated as electrochromic materials due to their tunable redox functionalities with highly ordered structure and large specific surface area facilitating fast ion transport. Herein, we have discussed the mechanistic insights of electrochromism in 2D COFs and their structure‐property relationship in electrochromic performance. Furthermore, the state‐of‐the‐art knowledge for developing the electrochromic 2D COFs and their potential application in next‐generation display devices are highlighted.

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Section: Discussionmentioning

confidence: 99%

Two‐dimensional Covalent Organic Frameworks for Electrochromic Switching

Sarkar

Dutta

Patra

2021

Chemistry An Asian Journal

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“…Coordination polymers or also known as supramolecular metallopolymers exhibit electrochromic properties mainly based on the metal‐to‐ligand charge‐transfer (MLCT) transition. [ 11–13 ] Their metal centers are incorporated on the main chain or side chain of the polymer, which can complement the advantages of organic materials and inorganic materials. Electrochromic films of coordination polymers have been fabricated based on molecular assembly: they have exceptional coloration efficiencies and redox stability, and also realize a wide range of colors.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Metal–Ligand Interaction of Synergistic Polymers for Bistable See‐Through Electrochromic Devices

et al. 2022

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Bistable electrochromic materials are a promising alternative solution to reduce energy consumption in displays. Limited by the mechanism and lack of a design strategy, only a few electrochromic materials have truly been able achieve bistability. Herein, a novel strategy is proposed to design bistable electrochromic materials based on polymer‐assisted dynamic metal–ligand coordination. The mechanism and materials of such unconventional electrochromic systems are proved by sufficient characterization. Synergistic stabilization of polymerized switchable dyes and the ionic ligand polymer are attracted to each other by supramolecular forces. The color states of the dye molecules are controlled and stabilized by valence changes of the metal ions. Meanwhile, through the polymerization of the electrochromic material and the nearby metal–ligand material, the metal ions of the electroinduced valence change are tightly fixed, and the related diffusion problem of the active EC component is also almost completely suppressed. This strategy successfully enables preparation of the corresponding transparent electrochromic displays with good performances, such as, the display information is clearly visible for more than 1.5 h without consuming energy. Furthermore, the new way of dynamic coordination or dissociation bistable displays could likely prosper the development of the electrochromic area and inspire other fields.

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“…Over the last three decades,n umerous advanced porous materials (APMs) have been developed. Constructed from structure-encoded building blocks,A PMs such as metalorganic frameworks (MOFs), [1][2][3][4][5][6] covalent organic frameworks (COFs), [7][8][9][10][11][12][13][14] porous organic polymers (POPs), [15][16][17] hydrogen-bonded organic frameworks (HOFs), [18][19][20][21] and porous molecular solids [22,23] have performed exceptionally in many aspects of science and technology.S pecifically,t he controlled pore sizes and surface areas of APMs are advantageous for areas such as molecular adsorption and separation, [24][25][26][27][28][29][30] heterogeneous catalysis, [31][32][33][34][35][36][37] and chemical sensing. [38][39][40] More importantly,integrating moving elements,such as molecular rotors (i.e.amolecular component that usually consists of astator and arotator, where the latter can display rotational dynamics), into the robust frameworks of APMs forms molecular-rotor-driven advanced porous materials (MR-APMs).…”

Section: Introductionmentioning

confidence: 99%

Molecular‐Rotor‐Driven Advanced Porous Materials

et al. 2021

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Advanced porous materials (APMs)—such as metal‐organic frameworks (MOFs) and porous organic polymers (POPs)—have emerged as an exciting research frontier of chemistry and materials science. Given their tunable pore size and extensive diversity, APMs have found widespread applications. In addition, adding dynamic functional groups to porous solids furthers the development of stimuli‐responsive materials. By incorporating moving elements—molecular rotors—into the porous frameworks, molecular‐rotor‐driven advanced porous materials (MR‐APMs) can respond reversibly to chemical and physical stimuli, thus imparting dynamic functionalities that have not been found in conventional porous materials. This Minireview discusses exemplary MR‐APMs in terms of their design, synthesis, rotor dynamics, and potential applications.

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An Electrochromic Hydrogen‐Bonded Organic Framework Film

Cited by 120 publications

References 52 publications

Two‐dimensional Covalent Organic Frameworks for Electrochromic Switching

Two‐dimensional Covalent Organic Frameworks for Electrochromic Switching

Dynamic Metal–Ligand Interaction of Synergistic Polymers for Bistable See‐Through Electrochromic Devices

Molecular‐Rotor‐Driven Advanced Porous Materials

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