Organic compound and electrochromic element containing the same

1. A composition, comprising a compound having an absorption peak at 400 nm or more and 600 nm or less in its colored state and a compound having the following general formula [7]:

wherein A 1 and A 2 independently denote a hydrogen atom, an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, or an optionally substituted aryl group,

provided that at least one of A 1 and A 2 denotes the alkyl group, the alkoxy group, or the aryl group,

the aryl group may have an alkyl group containing 1 or more and 8 or less carbon atoms or an alkoxy group containing 1 or more and 8 or less carbon atoms as a substituent,

R 7 denotes a hydrogen atom, a halogen atom, an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, an alkyl ester group containing 1 or more and 20 or less carbon atoms, an optionally substituted aryl group, an optionally substituted amino group, or a cyano group,

the aryl group may have an alkyl group containing 1 or more and 4 or less carbon atoms as a substituent,

R 2 to R 5 independently denote an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, an optionally substituted aryl group, an alkyl ester group containing 1 or more and 20 or less carbon atoms, an optionally substituted amino group, or a cyano group,

R 1 and R 6 independently denote a hydrogen atom, a halogen atom, an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, an alkyl ester group containing 1 or more and 20 or less carbon atoms, an optionally substituted aryl group, an optionally substituted amino group, or a cyano group,

m is an integer in the range of 1 to 3, and a plurality of R 3 's and R 4 's may be the same or different.

2. The composition according to claim 1 , wherein the compound having an absorption peak at 400 nm or more and 600 nm or less in its colored state has the following general formula [2]:

wherein A 3 and A 4 independently denote a hydrogen atom, an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, or an optionally substituted aryl group, provided that at least one of A 3 and A 4 denotes the alkyl group, the alkoxy group, or the aryl group,

the aryl group may have an alkyl group containing 1 or more and 4 or less carbon atoms or an alkoxy group containing 1 or more and 4 or less carbon atoms as a substituent,

R 8 denotes a hydrogen atom, a halogen atom, an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, an alkyl ester group containing 1 or more and 20 or less carbon atoms, an optionally substituted aryl group, an optionally substituted amino group, or a cyano group,

the aryl group may have an alkyl group containing 1 or more and 4 or less carbon atoms as a substituent,

X has a structure represented by any of the following general formulae [3]to [6], n is 1 or 2, when n is 2, a plurality of X's are independently selected from the following general formulae [3] to [6]:

wherein R 11 to R 16 independently denote a hydrogen atom, a halogen atom, an alkyl group containing 1 or more and 20 or less carbon atoms, an alkoxy group containing 1 or more and 20 or less carbon atoms, an optionally substituted aryl group, an alkyl ester group containing 1 or more and 20 or less carbon atoms, an optionally substituted amino group, or a cyano group, and R 21 denotes an optionally branched alkylene group having 1 or more and 20 or less carbon atoms.

3. An electrochromic element, comprising: a pair of electrodes and a electrochromic layer between the pair of electrodes, wherein

the electrochromic layer contains an electrochromic composition and a supporting electrolyte, and

the composition is the organic compound according to claim 1 .

4. The electrochromic element according to claim 3 , wherein the entire composition shows electrochromic characteristics on one of the pair of electrodes.

5. The electrochromic element according to claim 4 , wherein the electrochromic layer further contains another electrochromic compound, and

that other electrochromic compound exhibits electrochromic characteristics on an electrode facing the electrode on which the composition exhibits the electrochromic characteristics.

6. An optical filter, comprising: the electrochromic element according to claim 5 ; and a TFT element connected to the electrochromic element.

7. A lens unit, comprising: the optical filter according to claim 6 ; and an imaging optical system.

8. An image pickup apparatus, comprising: the optical filter according to claim 6 ; an imaging optical system; and an image pickup element configured to take images through the optical filter.

9. The composition according to claim 1 , wherein m is 2 or 3.

10. An electrochromic elements, comprising: a pair of electrodes and a electrochromic layer between the pair of electrodes, wherein

the electrochromic layer contains an electrochromic composition and a supporting electrolyte, and

the composition is the organic compound according to claim 2 .