RU-2861680-C2 - ANODICALLY COLOURING ELECTROCHROMIC COMPOUNDS, AND DEVICES AND COMPOSITIONS CONTAINING SAME

Abstract

FIELD: chemistry. SUBSTANCE: invention relates to an electrochromic device comprising: (a) a first substrate having a surface containing a first transparent electrode layer; (b) a second substrate having a surface containing a second transparent conductive electrode layer, wherein said first transparent electrode layer and said second transparent electrode layer are arranged opposite each other; and (c) an electrochromic layer disposed between said first transparent conductive electrode layer and said second transparent conductive electrode layer, wherein said electrochromic layer comprises: (i) a cathodic component, (ii) an anodic component, (iii) an electrolyte and (iv) a polymer matrix, wherein said anodic component comprises an anodically colouring electrochromic compound represented by formula (I), where R 1 and R 2 are each independently selected from linear or branched C 3 -C 20 alkyl. The invention also relates to an electrochromic composition and to the use of compound (I) as an anodically colouring electrochromic compound. EFFECT: ability to control the concentration of hydrogen peroxide in the oxidation reactor; to prevent the formation of hydrogen peroxide concentrations that exceed the safe limit; to increase the extraction efficiency and thereby increase the production rate of hydrogen peroxide; and to reduce the formation of an undesirable degraded form of anthraquinone. 22 cl, 2 dwg

Inventors

• CHRISTIANSEN, Dylan

Dates

Publication Date

20260507

Application Date

20220527

Priority Date

20210528

Claims (20)

1. 1. An electrochromic device comprising:
2. (a) a first substrate having a surface comprising a first transparent electrode layer;
3. (b) a second substrate having a surface comprising a second transparent conductive electrode layer,
4. wherein said first transparent electrode layer and said second transparent electrode layer are located opposite to each other; and
5. (c) an electrochromic layer located between said first transparent conductive electrode layer and said second transparent conductive electrode layer, where said electrochromic layer comprises:
6. (i) cathode component,
7. (ii) anode component,
8. (iii) electrolyte and
9. (iv) a polymer matrix,
10. wherein said anode component comprises an anodic-colorable electrochromic compound represented by the following formula (I):
11. (I),
12. where R 1 and R 2 are each independently selected from linear or branched C 3 -C 20 alkyl.
13. 2. The electrochromic device of claim 1, wherein R 1 and R 2 each independently represent a linear or branched C 3 -C 10 alkyl.
14. 3. The electrochromic device of claim 2, wherein R 1 and R 2 each independently represent a linear or branched C 4 -C 8 alkyl.
15. 4. The electrochromic device of claim 1, wherein said cathode component comprises a 1,1'-disubstituted-4,4'-dipyridinium cation represented by the following formula (II):
16. (II),
17. where R 3 and R 4 are each independently selected from linear or branched C 1 -C 10 alkyl, unsubstituted aryl, and substituted aryl.
18. 5. The electrochromic device of claim 4, wherein R 3 and R 4 are each independently selected from linear or branched C 1 -C 4 alkyl, unsubstituted phenyl, and substituted phenyl.
19. 6. The electrochromic device of claim 4, wherein said cathode component further comprises counteranions, wherein each counteranion of the cathode component is independently selected from the group consisting of BF 4 - , PF 6 - , ClO 4 - , CF 3 SO 3 - or (CF 3 SO 2 ) 2 N - and (CF 3 SO 2 ) 3 C - .
20. 7. An electrochromic device according to claim 1, wherein said electrolyte contains:

Description

Field of technology to which the invention relates The present invention relates to anodically colorable electrochromic compounds, as well as to electrochromic devices and compositions containing such anodically colorable electrochromic compounds. Information on the prior art Electrochromism involves a reversible change in a material's visible color and/or transmittance of visible light upon the application of an electric potential. The change in color and/or transmittance typically involves alternating oxidized and reduced charge states. A material that generates color upon undergoing reduction is typically called a cathodically colorable electrochromic material; a material that generates color upon undergoing oxidation is called an anodically colorable electrochromic material. In some cases, anodically dyeable electrochromic materials are desirable to be colorless in their neutral state and provide a preferred degree of color reproducibility and contrast. In some cases, anodically dyeable electrochromic materials in their neutral and/or radical cation states may have insufficient solubility in the liquid electrochromic compositions from which the electrochromic layer is formed. It would be desirable to develop new anodically dyeable electrochromic materials. Furthermore, it would be desirable for such newly developed anodically dyeable electrochromic materials to provide properties and characteristics that are at least as good as those of currently available anodically dyeable electrochromic materials. Brief description of the invention According to the present invention, there is provided an electrochromic device comprising: (a) a first substrate having a surface comprising a first transparent electrode layer; (b) a second substrate having a surface comprising a second transparent electrode layer, wherein said first transparent electrode layer and said second transparent electrode layer are located opposite to each other; and (c) an electrochromic layer located between said first transparent electrode layer and said second transparent electrode layer, wherein said electrochromic layer comprises: (i) cathode component, (ii) anode component, (iii) electrolyte and (iv) a polymer matrix, wherein said anode component comprises an anodic-colorable electrochromic compound represented by the following formula (I), When referring to formula (I), R 1 and R 2 are each independently selected from linear or branched C 3 -C 20 alkyl. According to the present invention, there is provided an electrochromic composition comprising: (i) cathode component, (ii) anode component, (iii) electrolyte, (iv) a polymer thickener and (v) solvent. The anode component of the electrochromic composition comprises an anodic-colourable electrochromic compound represented by formula (I) as shown above, wherein R 1 and R 2 are each independently selected from linear or branched C 3 -C 20 alkyl. In further accordance with the present invention, there is provided an anodic-colorable electrochromic compound represented by formula (I) as shown above, wherein R 1 and R 2 are each independently selected from linear or branched C 3 -C 20 alkyl. The features that characterize the present invention are set forth in detail in the claims, which are appended to and form part of this disclosure. These and other features of the invention, its operational advantages, and the specific objectives achieved through its use will be more fully understood from the following detailed description, which illustrates and describes non-limiting embodiments of the invention. Brief description of the drawings Fig. 1 is a typical side sectional view of an electrochromic device according to the present invention; and Fig. 2 is a typical side sectional view of an electrochromic device according to the present invention, which further includes a gasket that serves to seal the electrochromic layer. In Fig. 1 and 2, similar symbols refer to the same components and/or elements, as the case may be, unless otherwise indicated. Detailed description of the invention As used herein, the articles "a," "an," and "the" include plural references unless otherwise clearly and unambiguously limited to a single entity. Unless otherwise stated, all ranges or ratios disclosed herein should be understood to encompass any and all sub-ranges or sub-ratios contained therein. For example, a stated range or ratio of "1 to 10" should be understood to include any and all sub-ranges from and including a minimum value of 1 to and including a maximum value of 10; that is, all sub-ranges or sub-ratios beginning with a minimum value of 1 or more and ending with a maximum value of 10 or less, such as, but not limited to, 1 to 6.1, 3.5 to 7.8, and 5.5 to 10. In this document, unless otherwise indicated, left-to-right representations of linking groups, such as divalent linking groups, include other appropriate orientations, such as, but not limited to, right-to-left orientations. For purposes of non-limiti