A one-dimensional covalent organic framework film for near-infrared electrochromism

Shi, Peng; Wang, Jiawei; Guo, Zhiyong

doi:10.1016/j.cej.2022.139082

Cited by 37 publications

(11 citation statements)

References 38 publications

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“…Since their discovery in 2005 by Yaghi et al, COFs have drawn much attention and found diverse applications in adsorption and separation, catalysis, sensing, energy storage, optoelectronics, and biomedicine because of their designable framework, good crystallinity, permanent porosity, tunable pore structure, and satisfactory chemical stability . For nearly 20 years, most studies have relied on reticular chemistry to synthesize one-dimensional (1D), two-dimensional (2D), three-dimensional (3D), and woven COFs with the desired structures by combining two organic monomers with specific spatially oriented reaction sites under a predesigned topology . Although such structure-oriented synthesis allows one to greatly increase the number of known COFs (Figure A), the reliance on two-component reactions complicates the synthesis of highly crystalline functionalized COFs.…”

Section: Introductionmentioning

confidence: 99%

Construction of Covalent Organic Frameworks via Multicomponent Reactions

2023

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Multicomponent reactions (MCRs) combine at least three reactants to afford the desired product in a highly atomeconomic way and are therefore viewed as efficient one-pot combinatorial synthesis tools allowing one to significantly boost molecular complexity and diversity. Nowadays, MCRs are no longer confined to organic synthesis and have found applications in materials chemistry. In particular, MCRs can be used to prepare covalent organic frameworks (COFs), which are crystalline porous materials assembled from organic monomers and exhibit a broad range of properties and applications. This synthetic approach retains the advantages of small-molecule MCRs, not only strengthening the skeletal robustness of COFs, but also providing additional driving forces for their crystallization, and has been used to prepare a series of robust COFs with diverse applications. The present perspective article provides the general background for MCRs, discusses the types of MCRs employed for COF synthesis to date, and addresses the related critical challenges and future perspectives to inspire the MCR-based design of new robust COFs and promote further progress in this emerging field.

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Section: Introductionmentioning

confidence: 99%

Construction of Covalent Organic Frameworks via Multicomponent Reactions

2023

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“…This ESD fabricated HOF film additionally displays unique PL performance and the ability to be deposited in distinct patterns (Table S1, Supporting Information). [32][33][34][35][36][37][38] In comparison with well-developed metallo-supramolecular polymers based on EC materials, [39][40] the PFC-1 film displays more color change in more broaden wavelength range with two-band regulation at 550 and 830 nm. Compared with the already applied electrochromic devices of B787 window, the HOFs based on electrochromic materials exhibit more color change and faster response (within 10 s) in the electrochromic process.…”

Section: Resultsmentioning

confidence: 99%

A Large‐Area Patterned Hydrogen‐Bonded Organic Framework Electrochromic Film and Device

Feng

Luo

Wang

et al. 2023

Small

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Fabrication of a patterned hydrogen‐bonded organic framework (HOF) films on a large scale is an extreme challenge. In this work, a large area HOF film (30 × 30 cm2) is prepared via an efficient and low‐cost electrostatic spray deposition (ESD) approach on the un‐modified conductive substrates directly. Combining the ESD with a template method, variously patterned HOF films can be easily produced, including deer‐ and horse‐shaped films. The obtained films exhibit excellent electrochromic performance with multicolor change from yellow to green and violet, and two‐band regulation at 550 and 830 nm. Benefiting from the inherently present channels of HOF materials and the additional film porosity created by ESD, the PFC‐1 film could quickly change color (within 10 s). Furthermore, the large‐area patterned EC device is constructed based on the above film to prove practical potential application. The presented ESD method can be extended to other HOF materials; thus, this work paves a feasible path for constructing large‐area patterned HOF films for practical optoelectronic applications.

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“…As typical PEC materials, poly-triphenylamine derivatives can be easily oxidized to radical cations accompanied with obvious color changes during the electrochemical redox process. − However, the poor film-forming property of triphenylamine molecules and the partial irreversible changes caused by over-redox processes easily cause poor cycling stability, which limits their development and applications. Some researchers synthesized novel triphenylamine derivatives by introducing electron-donating groups such as thiophene, pyrrole, and ferrocene to stabilize cationic radicals and prepared polymer films directly on the electrode surface by electrochemical polymerization, which is not suitable for the preparation of large-area polymer films.…”

Section: Introductionmentioning

confidence: 99%

Thermally Cross-Linked Copolymer for Highly Transparent to Multicolor-Showing Electrochromic Materials

Zhu

et al. 2023

ACS Appl. Polym. Mater.

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A triphenylamine derivative STPA was designed and synthesized by introducing thermally cross-linked vinyl group at the end of 4methoxytriphenylamine. The corresponding polymer pSTPA was prepared by a thermal polymerization reaction without any initiator. CV tests reveal that pSTPA has a pair of distinct redox peaks. Spectroelectrochemical results demonstrates that pSTPA has a maximum absorption peak at 354 nm and a new absorption peak at 730 nm with increasing voltage, accompanied with the polymer from transparent to blue. In order to realize multicolor showing and improve the cycling stability, the corresponding copolymer pSTPA-co-TPA-OCH 3 was further prepared via thermally cross-linked vinyl groups by combining STPA with methoxy-modified triphenylamine derivative TPA-OCH 3 monomers in a molar ratio of 1:1. As expected, the copolymer film presents a multicolored appearance with four color changes (transparent−dark yellow−sky blue−purple), high optical contrast (45.0% at 480 nm, 56.1% at 700 nm, and 82.4% at 910 nm, respectively), large coloration efficiency of 287 cm 2 /C (at 910 nm), and good cycling stability (essentially no degradation of optical contrast over 2000 cycles). Therefore, this work puts forward an effective method to achieve a highly transparent to multicolor-showing electrochromic polymer via thermally cross-linked copolymerization, which shows potential applications in smart windows, sunglasses, and electronic tags.

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A one-dimensional covalent organic framework film for near-infrared electrochromism

Cited by 37 publications

References 38 publications

Construction of Covalent Organic Frameworks via Multicomponent Reactions

Construction of Covalent Organic Frameworks via Multicomponent Reactions

A Large‐Area Patterned Hydrogen‐Bonded Organic Framework Electrochromic Film and Device

Thermally Cross-Linked Copolymer for Highly Transparent to Multicolor-Showing Electrochromic Materials

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