Suitability of alkyne donor-π-donor-π-donor scaffolds for electrofluorochromic and electrochromic use

Wałęsa‐Chorab, Monika; Muras, Kacper; Filiatrault, Heather L.; Skene, W. G.

doi:10.1039/d1tc03388c

Cited by 17 publications

(7 citation statements)

References 86 publications

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“…The decrease in the contrast ratio between the neutral and the oxidized states with prolonged switching of the applied potential can be assigned to a partial degradation of the electrochrome by oxygen that continuously permeates into the device during operating [45]. This is based on an oxygen impervious ECD that operated continuously for 5 h with minimal loss of color contrast of a similar triphenylamine electrochrome [46]. The fully stretchable device (D3) showed a similar trend.…”

Section: Electrochromic Performancementioning

confidence: 91%

An intrinsically stretchable and bendable electrochromic device

Lerond

Raj

et al. 2022

Nanotechnology

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Stretchable electrochromic devices were fabricated from electrospun PEDOT:PSS (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) fibers. Stretchable and transparent electrodes with a sheet resistance of 1200 Ω/sq were prepared by depositing the conductive fibers on elastomeric substrates that were prepared from polydimethylsiloxane. The conductive substrates replaced the ITO coated glass electrodes that are typically used in electrochromic devices. The functioning device was prepared from a flexible chitosan electrolytic gel and a 4,7-bis(4-diphenylaminophenyl)-2,1,3-benzothiaziazole (TPA-BZT-TPA) electrochrome that were deposited on the streatchable transparent electrodes. The assembled device could be stretched to 150% its original length and bent to a curvature of 0.1. The device could be operated and switched between its yellow (off) and blue (on) states while being stretched and bent with a maximum contrast ΔT ≈30% at 805 nm and a coloration efficiency of 168 cm2/C. The stretchable device had an electrochromic contrast that was 30% greater than its counterpart that was prepared from conventional ITO-glass electrodes. The critical composition required for making devices truly stretchable was possible by evaluating the performance of five types of devices consisting of different layers.

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Section: Electrochromic Performancementioning

confidence: 91%

An intrinsically stretchable and bendable electrochromic device

Lerond

Raj

et al. 2022

Nanotechnology

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“…This suggests that the solvent-dependent fluorescence shift is mostly caused by dipole−dipole interactions between the polymer and the solvent in the excited state. 60 2.5. Properties of the Polymer Films.…”

Section: Solvatochromic Effectmentioning

confidence: 99%

Multifunctional Applications of D−π–A-Type Poly Schiff Bases for Electrochromic, Electrofluorochromic Materials, and Organic Cathodes for Aqueous Zinc Ion Batteries

Chu,

You,

Liang

et al. 2024

ACS Appl. Polym. Mater.

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Based on triphenylamine (TPA) and aromatic diamines, two multifunctional donor−π−acceptor (D−π−A) conjugated poly-Schiff bases (PSBs) were synthesized and subsequently tested and analyzed. The aforementioned conjugated PSBs exhibit electrochromic (EC) and electrofluorochromic (EFC) features and can be utilized as cathode electrode materials for aqueous Zn-ion batteries (AZIBs). Both polymer films, PTTB-1 and PTTB-2, show good EC and EFC properties, excellent dissolution processability, thermal stability, and reversible yellow-to-violet color changes in the UV−vis region. Between them, better optical contrast (46%), a fast response time (2.8 s/ 8.2 s), a high coloring efficiency (CE = 310 cm 2 C −1 ), and good cycling stability (10% attenuation over 2000 s of cycling) are all displayed by the PTTB-2 polymer. PTTB-1 and PTTB-2 present excellent EFC properties and solvatochromic effects. Full batteries constructed using a zinc anode, PSB cathodes, and 2 mol L −1 Zn(CF 3 SO 3 ) 2 aqueous solution show better rate performance, quicker reaction kinetics, and high cycling stability. The specific capacities of PAZIB-1 and PAZIB-2 reach 143 and 150 mA h g −1 , respectively, at a current density of 0.1 A g −1 . Furthermore, the specific capacities can still reach 93 and 102 mA h g −1 at a high current density of 6 A g −1 . Surprisingly, the full batteries exhibit outstanding cycling stability for long-term cycling (6 A g −1 , >5000 cycles). These innovative PSB materials, which integrate several functionalities, present more opportunities for the development of EC displays, AZIBs, sensing materials, and energy-efficient smart windows.

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“…Meanwhile, the emission was nearly quenched in acetone, with the emission shifting to the near infrared (810 nm) [ 72 ]. M. Wałęsa-Chorab et al developed MV12 to examine the effects of the electronic-rich central aromatic (thiophene vs. ethylenedioxythiophene (EDOT)) and the substitution of the terminal TPAs on the EFC properties [ 84 ]. Unlike the emitters synthesized by A. Capodilupo et al that exploited the intrinsically fluorescent fluorene core [ 53 ], the fluorescence of MV12 was from the conjugated alkyne framework with an electron-rich central heterocycle.…”

Section: Molecular Electrofluorochromesmentioning

confidence: 99%

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

2023

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In this review, recent advances that exploit the intrinsic emission of organic materials for reversibly modulating their intensity with applied potential are surveyed. Key design strategies that have been adopted during the past five years for developing such electrofluorochromic materials are presented, focusing on molecular fluorophores that are coupled with redox-active moieties, intrinsically electroactive molecular fluorophores, and unconjugated emissive organic polymers. The structural effects, main challenges, and strides toward addressing the limitations of emerging fluorescent materials that are electrochemically responsive are surveyed, along with how these can be adapted for their use in electrofluorochromic devices.

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Suitability of alkyne donor-π-donor-π-donor scaffolds for electrofluorochromic and electrochromic use

Abstract: A series of electroactive materials consisting of an aromatic core that was conjugated with two alkynes and flanked with two triphenyl amines was investigated as electrochromes and electrofluorochromes.

Cited by 17 publications

References 86 publications

An intrinsically stretchable and bendable electrochromic device

An intrinsically stretchable and bendable electrochromic device

Multifunctional Applications of D−π–A-Type Poly Schiff Bases for Electrochromic, Electrofluorochromic Materials, and Organic Cathodes for Aqueous Zinc Ion Batteries

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

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