Azo Polymer Selective Alkali Metal Ion Detection
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Solution Overview
Problem
Current technologies lack effective materials for selectively detecting and separating alkali metal ions, particularly lithium and sodium, which are crucial for improving battery performance and physiological functions, due to limited sensitivity and specificity of existing azo-based monomers and polymers.
Innovation Solution
Development of a novel azomonomer and azopolymer with specific structural features, including an alkyleneoxy group and a long alkyl chain, that selectively bonds with lithium and sodium ions, exhibiting excellent light sensitivity and heat resistance, allowing for the creation of a metal ion sensor and capturing agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing azo-based monomers and polymers are used, then the sensor material can be obtained, but the selectivity and sensitivity for detecting alkali metal ions is insufficient
Solution Approach 1:
The patent introduces specific functional groups (crown ether, calixarene, unimolecular azobenzene derivatives) at localized positions within the polymer structure to create regions with enhanced metal ion binding capability. This local functionalization allows the sensor to selectively detect specific alkali metal ions while maintaining the overall polymer structure
Solution Approach 2:
The patent combines azobenzene chromophores with metal-binding functional groups (crown ether, calixarene) to create composite polymer structures. This composite approach integrates the optical properties of azobenzene with the selective metal ion binding capabilities of the functional groups, achieving both detection sensitivity and selectivity
2Use of energy by moving object
If azobenzene groups are introduced into polymers for optical detection, then light sensitivity is improved, but the ability to selectively capture specific metal ions is limited
Solution Approach 1:
The patent merges the optical detection function of azobenzene groups with the selective metal ion binding function of crown ether and calixarene moieties into a single integrated sensor material. This merging allows the material to simultaneously exhibit light sensitivity for detection and selective binding for specific metal ion capture
Solution Approach 2:
The patent designs polymer structures that perform multiple functions: optical detection through azobenzene photoisomerization, selective metal ion binding through crown ether or calixarene groups, and signal transduction. This multi-functionality enables a single material to address both detection sensitivity and metal ion selectivity requirements
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 azopolymer effectively forms complexes with lithium and sodium ions while avoiding potassium ions, enabling selective detection and separation, thereby enhancing battery performance and physiological control with high sensitivity and specificity.
Implementation Method 1
the azopolymer according to one embodiment of the present invention is characterized in that it forms a complex with a lithium ion and a sodium ion among alkali metal ions, but does not form a complex with a potassium ion
Implementation Method 2
azobenzene has advantages of causing minute optical changes by photoisomerization such as changes in birefringence, absorptivity of complex and absorption wavelength
Data Source
Figure 1(a)~1(c)
Figure 2(a)~2(d)
Figure 3(a)~3(d)
AI summary
According to one embodiment of the present invention, an azo polymer forms a complex with a lithium ion and a sodium ion among alkali metal ions, but does not form a complex with a potassium ion. Therefore, the azo polymer is expected to be utilized as a material for a sensor capable of selectively detecting a specific alkali metal ion, or as a novel material capable of selectively trapping a specific alkali metal ion from a solution in which metal ions are mixed.