Polycyclic Aromatic Hydrocarbon Derivative for Light Modulation
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Solution Overview
Problem
Conventional light-modulating materials, such as polyacetylene compounds with polycyclic aromatic hydrocarbon substituents, face challenges in hot seasons as they allow infrared light to pass through while blocking visible light, and they often suffer from low long-term stability and insufficient light modulation.
Innovation Solution
A light-modulating material comprising a polycyclic aromatic hydrocarbon derivative with 10 to 500 aromatic rings and specific substituents, which allows for effective near-infrared absorption and emission, enhancing stability and light modulation capabilities by controlling electron density and absorption wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polyacetylene compound with polycyclic aromatic hydrocarbon substituent is used to block visible light, then light transmittance in visible region is reduced, but infrared light transmittance increases (allowing heat penetration)
Solution Approach 1:
The patent modifies the chemical structure parameters of the polycyclic aromatic hydrocarbon by increasing the number of aromatic rings to 10-500 and introducing specific substituents (formulas 2, 3, or 10), which changes the optical absorption characteristics to extend into the infrared region while maintaining visible light blocking capability
Solution Approach 2:
The patent creates a composite light-modulating material that combines polycyclic aromatic hydrocarbon derivative with specific substituent groups, forming a new material system that simultaneously achieves visible light blocking and infrared light absorption, resolving the contradiction between visible light transmittance control and infrared heat management
2Illumination intensity
If conventional light-modulating materials are used, then light transmittance can be adjusted, but long-term stability is insufficient
Solution Approach 1:
The patent optimizes the molecular structure parameters by specifying 10-500 aromatic rings and particular substituent configurations, which enhances the chemical and thermal stability of the material while preserving its electrochromic functionality for long-term reliable operation
Solution Approach 2:
The patent develops a stable polycyclic aromatic hydrocarbon derivative material that replaces conventional less stable light-modulating materials, ensuring long-term durability and reliability for practical applications in various environments
3Illumination intensity
If conventional light-modulating materials are used, then some light modulation function is provided, but the modulation capability is insufficient
Solution Approach 1:
The patent extends the light modulation capability by designing polycyclic aromatic hydrocarbon derivatives with 10-500 aromatic rings and specific substituents that absorb light across a broad spectrum from visible to infrared regions, significantly expanding the modulation range and adaptability
Solution Approach 2:
The patent creates a multi-functional light-modulating material that can modulate light across multiple wavelength regions (visible and infrared), providing universal applicability for various lighting and thermal management scenarios beyond the limited capability of conventional materials
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 new material effectively modulates light across a wide region from visible to infrared, offering improved stability and practical usability, suitable for applications in light-modulating, fluorescent, and phosphorescent materials.
Implementation Method 1
the polyacetylene compound that has one or more substituents containing a polycyclic aromatic hydrocarbon is capable of changing the light transmittance in a wide wavelength region
Implementation Method 2
The organic electrochromic material is being used in various fields including... electronic parts such as electronic paper
Implementation Method 3
Patent Documents 2 to 5 and Non-Patent Documents 1 to 4 disclose further polycyclic aromatic hydrocarbons suitable for use as a fluorescent material
Implementation Method 4
Patent Documents 2 to 5 and Non-Patent Documents 1 to 4 disclose further polycyclic aromatic hydrocarbons suitable for use as a fluorescent material, phosphorescent material
Data Source
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AI summary
Provided is a new polycyclic aromatic hydrocarbon derivative. The polycyclic aromatic hydrocarbon derivative is a derivative of a polycyclic aromatic hydrocarbon having 6 or more aromatic rings and has a substituent represented by the following formula (1). (In the formula (1), R1 and R2 are carbon atoms of the aromatic rings in the polycyclic aromatic hydrocarbon, and R3 to R5 are carbon atoms of an aromatic ring or a heterocyclic ring in a group having the aromatic ring or the heterocyclic ring. n is 0 or 1, and m is the number of substituents.)