Phenazine Electrochromic Compound for Full-Color Displays
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Solution Overview
Problem
Existing electrochromic materials lack an absorption peak in the wavelength region of 540 nm or more in their colored state, limiting their application in full-color displays and other applications requiring various color tones.
Innovation Solution
An organic compound with a phenazine derivative structure, featuring alkoxy or aryloxy groups as substituents at specific positions, which shifts the absorption peak to 540 nm or more in the colored state while maintaining high transparency in the neutral state through steric hindrance and electronic interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing electrochromic materials are used, then the basic electrochromic function is achieved, but the absorption peak does not extend to 540 nm or more in the colored state, limiting color tone variety
Solution Approach 1:
The patent modifies the molecular structure parameters of the phenazine derivative by introducing specific substituents (alkoxy groups at positions 2 and 7, aryloxy groups at positions 3 and 6) to shift the absorption peak wavelength from below 540 nm to 540 nm or more in the colored state, thereby expanding the color tone variety while maintaining electrochromic functionality
Solution Approach 2:
The patent creates a composite molecular structure by combining the phenazine core with multiple different substituent groups (alkoxy and aryloxy groups) at specific positions, resulting in a compound that achieves both the desired long-wavelength absorption and high transparency properties
2Illumination intensity
If the conjugation length is increased to shift absorption to visible region, then the compound is colored by oxidation or reduction, but the absorption peak does not reach 540 nm or more
Solution Approach 1:
The patent optimizes the conjugation length parameter by strategic substitution on the phenazine ring, achieving a balanced conjugation system that produces absorption peaks at 540 nm or more in the colored state, enabling full-color display applications
3Adaptability or versatility
If materials with various color tones are developed, then full-color displays and broad applications become possible, but existing materials lack absorption peaks in the 540 nm or more region
Solution Approach 1:
The patent precisely controls the absorption peak position parameter through systematic modification of the phenazine derivative structure, specifically introducing alkoxy groups at positions 2 and 7 and aryloxy groups at positions 3 and 6, which shifts the absorption peak to 540 nm or more in the colored state while maintaining high transparency in the neutral state, thereby enabling broad application range including full-color displays
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compound achieves a long-wavelength absorption peak in the colored state and improved transparency in the neutral state, enabling broader applications in displays and optical filters.
Implementation Method 1
an electrochromic property in which the optical absorption property (such as a coloration state and/or an optical transmittance) is changed by an electrochemical oxidation-reduction reaction
Implementation Method 2
by oxidation in the case of an anodic EC compound or by reduction in the case of a cathodic EC compound, the conjugation length of the above compound is increased as compared to that thereof obtained before oxidation or reduction is performed, so that the wavelength region at which light is absorbed is shifted to a visible light region
Data Source
AI summary
An organic compound represented by the following general formula is provided.In the above formula (1), R11 to R15 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, an acyl group, or a halogen atom provided that at least one of R11, R13, and R15 represents the alkoxy group or the aryloxy group; and R11 to R15 may form a ring structure therebetween. R5 and R6 each independently represent an alkyl group, an aryl group, or an aralkyl group. In addition, R21 to R24 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an aralkyl group, an acyl group, or a halogen atom and may form a ring structure therebetween. The above groups except the acyl group may be substituted when necessary.