Reversible Electrochromic/Electrofluorochromic Dual Switching in Zn(II)-Based Metallo-Supramolecular Polymer Films

Mondal, Sanjoy; Santra, Dines Chandra; Roy, Susmita; Narayana, Yemineni S. L. V.; Yoshida, Takefumi; Ninomiya, Yoshikazu; Higuchi, Masayoshi

doi:10.1021/acsami.3c06673

Cited by 6 publications

(3 citation statements)

References 69 publications

(106 reference statements)

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“…The contrast ratio value defined as ΔT% of the films remains almost unchanged and close to 40% during the consecutive electrochemical cycles (up to 150 cycles were performed) suggesting robustness and good stability of the FeP 2 W 17 @SiO 2 thin film on ITO under applied potentials. Such good stability was achieved in spite of using bare ITO as a counter electrode thanks to the low applied overvoltage (avoiding any deterioration that may appear under strong electrochemical reduction 110 ) and owing to the stabilizing effect of the mesoporous silica film (as also reported for other modified ITO surfaces exploited in electrochromism applica- tions 111,112 ). The switching times calculated at the point at which the electrochromic device achieved 95% of its full switching cycle gave rise to a coloration time of about 2.1 s and bleaching time around 2.9 s with a transmittance modulation of 40% at λ = 515 nm.…”

Section: Immobilization Of [Fe(h 2 O)] 6 ] 3+ In the Mesoporous Matri...mentioning

confidence: 79%

Assessing the Influence of Confinement on the Stability of Polyoxometalate-Functionalized Surfaces: A Soft Sequential Immobilization Approach for Electrochromic Devices

Vilà,

Nguyen,

Lacroix

et al. 2024

ACS Appl. Mater. Interfaces

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A functionalization process has been developed and the experimental conditions optimized allowing the immobilization of first-row transition metal (M n+ ) containing polyoxometalates (POMs) with the formula [M(H 2 O)P 2 W 17 O 61 ] (10−n)− on transparent indium−tin oxide (ITO) electrodes for electrochromic applications. Both flat ITO grafted with 4-sulfophenyl moieties and sulfonate-functionalized vertically oriented silica films on ITO have been used as electrode supports to evaluate possible confinement effects provided by the mesoporous matrix on the stability of the modified surfaces and their electrochromic properties. Functionalization involved a two-step sequential process: (i) the immobilization of hexaaqua metallic ions, such as Fe(H 2 O) 6 3+ , onto the sulfonate-functionalized materials achieved through hydrogen bonding interactions between the sulfonate functions and aqua ligands (water molecules) coordinated to the metallic ions facilitating and stabilizing the attachment of the metallic ions to the sulfonated surfaces; (ii) their coordination to [P 2 W 17 O 61 ] 10− species to generate "in situ" the target [Fe(H 2 O)P 2 W 17 O 61 ] 7− moieties. Comparison of the characterized surfaces clearly evidenced a significant improvement in the long-term stability of the nanostructured [Fe(H 2 O)P 2 W 17 O 61 ] 7− -functionalized silica films compared to the less constrained flat [Fe(H 2 O)P 2 W 17 O 61 ] 7− -modified ITO electrodes for which a rapid loss of [P 2 W 17 O 61 ] 10− species was observed. Concordantly, the [Fe(H 2 O)P 2 W 17 O 61 ] 7− POM confined in the mesoporous films coated on ITO gave rise to much better and stable electrochromic properties, with a transmittance modulation of 40% at 515 nm.

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Section: Immobilization Of [Fe(h 2 O)] 6 ] 3+ In the Mesoporous Matri...mentioning

confidence: 79%

Assessing the Influence of Confinement on the Stability of Polyoxometalate-Functionalized Surfaces: A Soft Sequential Immobilization Approach for Electrochromic Devices

Vilà,

Nguyen,

Lacroix

et al. 2024

ACS Appl. Mater. Interfaces

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“…With the advantages of being environmentally friendly and having a wide range of color changes, conductive polymers have been extensively studied as EC materials in the recent decades . EC conductive polymer materials have received increasing attention in recent years because they can switch color states in a reversible manner at different applied voltages, as well as because of their tantalizing and expanded applications, especially in energy-efficient smart windows, automotive glass, solar panels, etc .…”

Section: Introductionmentioning

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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“…1A). 22–24 In this context, the search for new classes of efficient polymeric emitters based on earth-abundant metals is of vital importance for the further development of metallopolymer-based OLEDs.…”

Section: Introductionmentioning

confidence: 99%

Luminescent carbene–copper(i)–amide polymers for efficient host-free solution-processed OLEDs

Tan,

Ying,

Xie

et al. 2024

Chem. Sci.

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Reversible Electrochromic/Electrofluorochromic Dual Switching in Zn(II)-Based Metallo-Supramolecular Polymer Films

Cited by 6 publications

References 69 publications

Assessing the Influence of Confinement on the Stability of Polyoxometalate-Functionalized Surfaces: A Soft Sequential Immobilization Approach for Electrochromic Devices

Assessing the Influence of Confinement on the Stability of Polyoxometalate-Functionalized Surfaces: A Soft Sequential Immobilization Approach for Electrochromic Devices

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

Luminescent carbene–copper(i)–amide polymers for efficient host-free solution-processed OLEDs

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