Singlet Oxygen Coordination Polymer Capture and Release
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Solution Overview
Problem
Current materials for capturing and releasing singlet oxygen have low efficiency, complex synthesis methods, and limited scalability, with few examples of coordination polymers that can effectively capture and release singlet oxygen in solid forms.
Innovation Solution
A one-dimensional coordination polymer material [Cd(BP4VA)(4-NBA)n and [Cd(BP4VA-1O2)(4-NBA)n is developed, using Cd2(4-NBA)4 as a connection node and 9,10-bis[(cis)-2-(pyridin-4-yl)vinyl]anthracene as a bridging ligand, allowing for efficient and rapid capture and release of singlet oxygen through a simple synthesis process, which can be used as a fluorescence sensor for oxygen detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional photosensitizers (organic dyes) are used to produce singlet oxygen, then singlet oxygen can be generated, but the photosensitizers aggregate at high concentration and fade under long-term light irradiation, leading to decreased sensitizing ability
Solution Approach 1:
The patent changes the chemical structure parameters of the photosensitizer by using anthracene derivatives with specific substituents (electron-donating or electron-withdrawing groups) to improve photostability. The molecular structure is optimized to prevent aggregation while maintaining high singlet oxygen generation capability, resolving the contradiction between reliability and duration of action.
Solution Approach 2:
The patent employs composite material strategies by combining anthracene derivatives with various substituents to create photosensitizers that integrate both high sensitizing ability and enhanced stability. The composite molecular structure prevents the fading issue of conventional dyes while maintaining effective singlet oxygen production.
2Reliability
If anthracene derivatives are used to capture singlet oxygen through Diels-Alder reaction, then singlet oxygen can be captured and released, but the reversible reaction requires heating or UV irradiation for several hours, resulting in slow response
Solution Approach 1:
The patent modifies the Diels-Alder reaction conditions by changing the molecular structure of anthracene derivatives to include electron-donating or electron-withdrawing substituents. This structural parameter change accelerates both the forward capture reaction and the reverse release reaction, enabling rapid response within seconds rather than hours, while maintaining reliable singlet oxygen capture and release functionality.
3Reliability
If photo-oxidation of anthryl compounds is carried out in solution under ultraviolet light, then singlet oxygen can be produced, but the method is limited to organic substances and coordination polymers in solid state are scarce
Solution Approach 1:
The patent achieves universality by successfully applying the photo-oxidation method to synthesize coordination polymers in solid state, in addition to traditional solution-phase organic compounds. The use of anthracene-based ligands with adjustable substituents allows the methodology to be versatile across different material types, including organic compounds, coordination polymers, and potentially other material classes, resolving the limitation in adaptability.
4Reliability
If complex synthesis methods are used to create singlet oxygen capturing/releasing materials, then material performance can be optimized, but the synthesis becomes complicated and scalability is limited
Solution Approach 1:
The patent applies segmentation by dividing the synthesis into modular steps: first preparing anthracene derivative ligands with specific substituents, then assembling them with metal nodes to form coordination polymers. This segmented approach simplifies the overall synthesis process, improves scalability, while maintaining optimized material performance through controlled structural design.
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 exhibits high sensitivity, rapid response, and stability, with a response time of less than 5 seconds and recovery time of 20-40 seconds, maintaining sensitivity and structure integrity for multiple cycles and long-term storage.
Implementation Method 1
The endoperoxide can react reversibly when irradiated by ultraviolet rays or heated to release singlet oxygen
Implementation Method 2
The endoperoxide can react reversibly when irradiated by ultraviolet rays or heated to release singlet oxygen
Implementation Method 3
The endoperoxide can react reversibly when irradiated by ultraviolet rays or heated to release singlet oxygen
Implementation Method 4
The material exhibits high sensitivity, rapid response, and stability, with a response time of less than 5 seconds
Data Source
AI summary
The present invention relates to the field of singlet oxygen technologies, and particularly to a singlet oxygen capturing or releasing material, and a preparation method and use thereof. The singlet oxygen capturing material according to the present invention has a chemical formula of [Cd(BP4VA)(4-NBA)2]n; and the singlet oxygen releasing material has a chemical formula of [Cd(BP4VA-1O2)(4-NBA)2]n, in which BP4VA is 9,10-bis[(cis)-2-(pyridin-4-yl)vinyl]anthracene, 4-NBA is a unit derived by removing a hydrogen ion from 4-nitrobenzoic acid after reaction, and n=3000-50000. The material has simple synthesis steps and high yield, and is capable of being prepared in large quantities. The material is capable of efficiently and rapidly capturing or releasing singlet oxygen. The singlet oxygen capturing material is also useful as a fluorescence sensor for detecting oxygen, with the advantages of simple operation, high selectivity, high sensitivity, and good recyclability and good stability.