Spiro-oxazine UV Sensor Material Reusability
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Solution Overview
Problem
Current UV radiation sensing materials are expensive and have short lifetimes, making them less usable for long-term UV exposure monitoring, and they often require single-use indicators that fade after exposure.
Innovation Solution
A synthetic material represented by the formula (M′)8M″6M″′6O24(X,S)2, where M′, M″, M″′, and X are specific cations and anions from the IUPAC periodic table, which changes color intensity proportionally with UV radiation exposure, allowing for reusable UV and X-radiation detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If reusable photochromic molecules are used, then the device can be used multiple times, but the lifetime is short and functionality is lost after too long or intense UV exposure
Solution Approach 1:
The patent changes the chemical composition parameters by using spiro-oxazine compounds with specific substituents (electron-donating or electron-withdrawing groups) to optimize both reusability and lifetime. The molecular structure parameters are modified to achieve stability against UV degradation while maintaining photochromic reversibility.
Solution Approach 2:
The patent employs composite material systems where spiro-oxazine molecules are incorporated into polymer matrices or combined with other materials to enhance overall stability and lifetime while preserving the reusable photochromic functionality.
2Reliability
If spiro-oxazines are used, then the lifetime is extended to two to three years, but the price is high
Solution Approach 1:
The patent modifies the spiro-oxazine molecular structure by introducing various substituents at different positions of the molecule, which allows tuning of photochromic properties while potentially reducing synthesis complexity and cost. The structural parameters are optimized to achieve long lifetime at lower price points.
Solution Approach 2:
The patent develops cost-effective spiro-oxazine derivatives that may have slightly reduced but still acceptable lifetime compared to expensive variants, making the technology economically viable for widespread applications such as UV index badges and consumer products.
3Ease of manufacture
If organic photochromic molecules are used, then color change upon UV exposure is achieved, but the color fades when UV exposure is removed
Solution Approach 1:
The patent carefully selects and optimizes the substituent parameters on the spiro-oxazine molecule to control the reversibility of the photochromic reaction. By adjusting electronic and steric parameters of substituents, the patent achieves stable color change that persists appropriately after UV exposure while maintaining reusable reversibility.
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 material provides stable, long-term UV and X-radiation sensing capabilities, enabling reusable indicators that can detect UV A, B, and C radiation, and X-radiation, with color intensity correlating to radiation intensity, facilitating effective monitoring and potential applications in various products and security devices.
Implementation Method 1
UV responsive photochromic organic molecules that change color upon UV exposure can be used
Implementation Method 2
The material changes color intensity proportionally with UV radiation exposure
Data Source
AI summary
A material represented by the following formula (I)(M′)8M″6M″′6O24(X,S)2:M″″ formula (I).Also disclosed is an ultraviolet radiation sensing material, an X-radiation sensing material, a device and a method for determining the intensity of ultraviolet radiation.