ELECTROCHROMIC COMPOUND, ELECTROCHROMIC COMPOSITION, AND DISPLAY ELEMENT

• US 20150274761A1
• Filed: 11/01/2013
• Published: 10/01/2015
• Est. Priority Date: 11/01/2012
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Sagisaka, Toshiya, Takahashi, Hiroyuki, Okada, Takashi, Hirano, Shigenobu, Yashiro, Tohru, Fujimura, Koh, Naijo, Yoshihisa, Okada, Yoshinori, Tsuji, Kazuaki, Kim, Sukchan, Yutani, Keiichiroh, Horiuchi, Tamotsu, Inoue, Mamiko
• Granted Patent: US 10,093,693 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C07D 401/10 linked by a carbon chain containing aromatic rings
• CPC Class Codes: C07D 401/14 containing three or more hetero rings
• CPC Class Codes: C07F 7/0836 Compounds with one or more Si-OH or Si-O-metal linkage
• CPC Class Codes: C07F 9/58 Pyridine rings
• CPC Class Codes: C07F 9/65583 each of the hetero rings containing nitrogen as ring hetero atom
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 2203/02 reflective

Abstract

To provide an electrochromic compound, represented by the following general formula (I): General Formula (I) where X₁, X₂, X₃, X₄, X₅, X₆, X₇ and X₈ are each independently a hydrogen atom or a monovalent substituent; R₁ and R₂ are each independently a monovalent substituent; A− and B− are each independently a monovalent anion; and Y is represented by the following general formula (II) or (III): General Formula (II) General Formula (III) where X₉, X₁₀, X₁₂, X₁₃, X₁₄, X₁₅, X₁₆, X₁₇, and X₁₈ are each independently a hydrogen atom or a monovalent substituent.

Claims

1. An electrochromic compound, which is represented by the following general formula (I):

2. The electrochromic compound according to claim 1,

wherein the electrochromic compound is represented by the following general formula (IV):

3. The electrochromic compound according to claim 1, wherein, in the general formula (I), R₁, or R₂, or both thereof has a functional group capable of directly or indirectly bonding to a hydroxyl group.

4. The electrochromic compound according to claim 3, wherein the functional group capable of directly or indirectly bonding to a hydroxyl group is one selected from the group consisting of a phosphonic acid group, a phosphoric acid group, a carboxyl group, a silyl group, and a silanol group.

5. The electrochromic compound according to any of claim 3, wherein the functional group capable of directly or indirectly bonding to a hydroxyl group is one selected from the group consisting of a phosphonic acid group, a trialkoxysilyl group, and a trihydroxysilyl group.

7. An electrochromic composition, comprising:

an electroconductive or semiconductive nanostructure; and

the electrochromic compound according to claim 1, which is bonded to or adsorbed on the nanostructure.

8. The electrochromic composition according to claim 7, wherein the electroconductive or semiconductive nanostructure is composed of metal oxide particles, and wherein the metal oxide particles are at least one selected from the group consisting of titanium oxide, zinc oxide, tin oxide, alumina, zirconium oxide, iron oxide, magnesium oxide, indium oxide, and tungsten oxide.

9. The electrochromic composition according to claim 8, wherein the metal oxide particles have an average primary particle diameter of 30 nm or smaller.

6. (canceled)

10. A display element, comprising:

a display electrode;

a counter electrode provided to face the display electrode and to be spaced from the display electrode;

an electrolyte provided between the display electrode and the counter electrode; and

a display layer provided on a surface of the display electrode, which surface faces the counter electrode,

wherein the display layer comprises an

electrochromic compound represented by General Formula (I);

11. The display element of claim 10, wherein the display layer comprises an electrochromic composition comprising said electrochromic compound and an electroconductive or semiconductive nanostructure, wherein the electrochromic compound is bonded to or adsorbed on the nanostructure.