Metal Complexes as Dyes for Optical Data Storage and Electrochromic Materials

Mortimer, R.S.; Rowley, Natalie M.

doi:10.1016/b0-08-043748-6/09016-2

Cited by 24 publications

(17 citation statements)

References 198 publications

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“…There is a vast number of chemical species that show electrochromic properties, 2 including both metal coordination complexes in solution and as polymer films, 10 contrast ratio, coloration efficiency, cycle life, and write-erase efficiency. Some performance parameters are application dependent; displays need low response times, whereas 'smart windows' can tolerate response times of up to several minutes.…”

Section: Chemical Classes Of Electrochromic Materialsmentioning

confidence: 99%

“…The porphyrins are a group of highly colored, naturally occurring pigments containing a porphine nucleus ( figure 3) with substituents at the eight β-positions (2,3,7,8,12,13,17,18) of the pyrroles, and/or the four meso-positions (5,10,15,20) between the pyrrole rings. 43 The natural pigments are metal chelate complexes of the porphyrins.…”

Section: Metallophthalocyanine Electrochromic Filmsmentioning

confidence: 99%

“…10,30 Chromophoric properties arise from low-energy metal-to-ligand charge transfer (MLCT), intervalence CT, intraligand excitation, and related visible-region electronic transitions. Because these transitions involve valence electrons, chromophoric characteristics are altered or eliminated upon oxidation or reduction of the complex.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4][5][6][7][8][9][10] While materials are considered to be electrochromic when marked visible color changes are shown under illumination, recent interest in electrochromic devices (ECD's) for multispectral energy modulation by reflectance and absorbance has extended the definition. 11 Chemical species are now being studied for modulation of radiation in the near infra-red (NIR), 10,12 thermal infra-red, 13 and microwave regions, and 'color' can mean response of detectors to these electromagnetic regions, not just the human eye. 11 …”

Section: Introductionmentioning

confidence: 99%

“…An electrochromic material is one where a reversible color change takes place upon reduction (gain of electrons) or oxidation (loss of electrons), on passage of electrical current after the application of an appropriate electrode potential. [2][3][4][5][6][7][8][9][10] Many chemical species can be switched between redox states that have distinct electronic absorption spectra. Such spectra arise from either a moderate-energy internal electronic excitation or an intervalence optical charge transfer where the chemical species has two centers of differing valence or oxidation state.…”

Section: Introductionmentioning

confidence: 99%

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Electrochromic organic and polymeric materials for display applications

2006

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An electrochromic material is one where a reversible color change takes place upon reduction (gain of electrons) or oxidation (loss of electrons), on passage of electrical current after the application of an appropriate electrode potential. In this review the general field of electrochromism is introduced, with coverage of the types, applications, and chemical classes of electrochromic materials and the experimental methods that are used in their study. The main classes of electrochromic organic and polymeric materials are then surveyed, with descriptions of representative examples based on transition metal coordination complexes, viologen systems, and conducting polymers. Examples of the application of such organic and polymeric electrochromic materials in electrochromic displays are given.

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Section: Chemical Classes Of Electrochromic Materialsmentioning

confidence: 99%

Section: Metallophthalocyanine Electrochromic Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrochromic organic and polymeric materials for display applications

2006

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Electrochromic Polymers

Ribeiro¹,

Mortimer²

2015

Encyclopedia of Polymer Science and Technology

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were synthesized and electrochemically polymerized. Pendant group at 2-C position of the imidazole ring was functionalized with phenyl (P1), EDOT (P2) and ferrocene (P3) in order to observe substituent effect on electrochemical and electrochromic properties of corresponding polymers. Spectroelectrochemical results showed that different pendant groups resulted in polymers with slightly different optical band gaps (1.75, 1.69 and 1.77 eV respectively) and different number of achievable colored states. Optoelectronic performance were reported in detail.

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Molecular Nature of Electrodeposits in Electrochemical Water Oxidation

Younus

Ahmad

Al‐Abri

et al. 2023

Advanced Energy Materials

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The molecular nature and the structure of the real catalyst are matters of serious concern in homogeneous catalysis. Catalyst transformation in molecular water oxidation catalysis (WOC) is usually linked to catalyst decomposition with the generation of nanostructured materials. This is mainly due to the operational conditions that are conducive for the formation of metal oxides (MOx), which have a strong affinity for adsorbing onto the electrodes’ surfaces. Recently, the exhibition of the molecular nature of the electrodeposits rather than MOx is a breakthrough in the field of WOC, suggesting that deposits in electrocatalysis are not constrained to metal oxides/hydroxides after molecular catalyst decomposition. Therefore, several points should be considered before deciding whether the deposits are aggregates of a molecular structure or simple metal oxides formed due to the decomposition of the original structure. Thus, the aim of this perspective is to showcase the examples of homogeneous WOCs where metal–organic species are electrodeposited instead of metal oxide‐based catalysts. The transformation of heterogenized molecular catalysts for WO into a more electroactive form while preserving their molecular identity, is also discussed. This summary provides an overview of the molecular nature of electrodeposits, how to identify their presence and decide about their nature.

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Metal Complexes as Dyes for Optical Data Storage and Electrochromic Materials

Cited by 24 publications

References 198 publications

Electrochromic organic and polymeric materials for display applications

Electrochromic organic and polymeric materials for display applications

Electrochromic Polymers

Molecular Nature of Electrodeposits in Electrochemical Water Oxidation

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