Electrochromism and electrochemical properties of complexes of transition metal ions with benzimidazole-based ligand

Wałęsa‐Chorab, Monika; Banasz, Radosław; Marcinkowski, Damian; Kubicki, Maciej; Patroniak, Violetta

doi:10.1039/c7ra10451k

Cited by 28 publications

(9 citation statements)

References 36 publications

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“…Fe complexes [12,13,14,15] also exhibit potential applications in the field of electrochromism. Among these Fe complexes, Prussian blue (PB, an iron (II,III) hexacyanoferrate (II,III)) gains much attention for its high redox reversibility and low threshold potential [16].…”

Section: Introductionmentioning

confidence: 99%

Improving Electrochromic Cycle Life of Prussian Blue by Acid Addition to the Electrolyte

Tang

Zhou

et al. 2018

Materials

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In this study, we examined the cyclic stability of Prussian blue (PB) films in electrolytes with acid. The cyclic stabilities of the PB films were investigated in K+ based electrolytes with different values of solution pH. The acidified KCl solution can significantly improve the durability of the film. Among the three pH values tested, the KCl solutions (pH = 2.15 and pH = 3.03) showed better performance. Furthermore, we investigated the cyclic stabilities of the PB films in LiClO4/PC electrolyte containing different acids. We found that the cyclic stability of PB film was significantly improved when a small amount of acetic acid was dissolved in LiClO4/PC electrolyte. The PB film exhibited stable optical modulation after up to 20,000 cycles in LiClO4/PC electrolyte containing acetic acid—a much higher result than those of some literatures. This suggests that the addition of acetic acid to LiClO4/PC electrolyte can promote the development of PB-based devices with improved stability.

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Section: Introductionmentioning

confidence: 99%

Improving Electrochromic Cycle Life of Prussian Blue by Acid Addition to the Electrolyte

Tang

Zhou

et al. 2018

Materials

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“…In case of complex 1 the two quasi-reversible oxidation/reduction waves have been observed with the half-wave potentials of −0.29 V and +0.76 V (Figure 3). [32][33][34]. One additional irreversible wave assigned to the oxidation of the ligand molecule has been observed at +1.07 V in the anodic scan.…”

Section: Resultsmentioning

confidence: 91%

Reductive Electropolymerization and Electrochromism of Iron(II) Complex with Styrene-Based Ligand

et al. 2021

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The benzimidazole-based ligand containing polymerizable styrene group has been prepared via condensation of picolinaldehyde derivative containing styrene moiety and benzimidazole-based hydrazine. The ligand reacted with iron(II) tetrafluoroborate and iron(II) trifluoromethanesulfonate giving red-brown complexes of Fe(II) ions of formula [FeL2]X2, where X = CF3SO3− (1) or BF4− (2). Reductive electropolymerization was used to obtain a thin layer of the polymeric complex, poly-1. Further investigation of electrochemical properties of the compound by cyclic voltammetry showed two quasi-reversible redox processes assigned to electrooxidation and electroreduction of the polymer. Spectroelectrochemical measurements confirmed that the polymer undergoes the color changes during oxidation and reduction process. The polymer in its neutral state (Fe(II)) is yellow and it exhibits absorption band at 370 nm, after oxidation to Fe(III) state absorption band shifts to 350 nm and the polymer is almost colorless. While the metal ions are reduced to Fe(I) absorption band at around 410 nm has been observed and the polymer changed its color to intense yellow. The stability of the polymer during multiple oxidation/reduction cycles has also been investigated.

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“…Their energy levels are easily fine-tuned by applying changes to the organic ligand or greatly varied by changing the metal center. 277,278 However, they have the tendency to form crystalline domains in the solid state, either immediately upon deposition or over time. 107,279 This crystallization may modify film morphology, worsening the contact between the dye or counter electrode and HTM, thus hindering charge transport; or it may create charge recombination sites at grain boundaries.…”

Section: Coordination Metal Complex Hole Transporting Materialsmentioning

confidence: 99%

The researcher's guide to solid-state dye-sensitized solar cells

2018

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Electrochromism and electrochemical properties of complexes of transition metal ions with benzimidazole-based ligand

Abstract: Six complexes of transition metal ions have been synthesized and characterized. Complexes showed optical properties dependent on redox state of both metal ions and ligand molecule and can be used for the construction of multielectrochromic devices.

Cited by 28 publications

References 36 publications

Improving Electrochromic Cycle Life of Prussian Blue by Acid Addition to the Electrolyte

Improving Electrochromic Cycle Life of Prussian Blue by Acid Addition to the Electrolyte

Reductive Electropolymerization and Electrochromism of Iron(II) Complex with Styrene-Based Ligand

The researcher's guide to solid-state dye-sensitized solar cells

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