共价有机框架的结构异构,导致不同的电化学发光效应及其用于检测的应用
Xiang-Lan Mao1, Qiu-Xia Luo1, Yuan-Jun Cai1
1School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
Analytical chemistry
|July 4, 2023
概括
在共价有机框架 (COFs) 中的结构异构显著影响电化学发光 (ECL). 这项研究表明,由于极性相互作用和电荷传输的增强,TFPB-BD(OMe) 2-H表现出比其同位素更优异的ECL性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 摄影化学的使用.
背景情况:
- 聚合有机框架 (COF) 是具有可调节性质的晶体多孔聚合物.
- 在COF中的结构异构可能导致电子和光学特征的变化.
- 电化学发光 (ECL) 是一种敏感的检测技术,在传感和成像方面具有应用.
研究的目的:
- 研究COF中的结构异构对其电化学发光 (ECL) 性能的影响.
- 合成和描述一对具有不同 imine 链接方向的异构COF.
- 探索这些COF中控制ECL排放的结构-属性关系.
主要方法:
- 通过 imine 凝结和素形成,合成两个异构性 COF (TFPB-BD(OMe) 2-H 和 TAPB-BD(OMe) 2-H).
- 使用像X射线衍射和光谱学这样的技术来描述COF结构和特性.
- 对同位体COFs的光电化学和ECL性能进行评估.
- 一个ECL传感器的制造和测试,用于As(V) 检测.
主要成果:
- 异构性COF表现出不同的ECL行为,尽管它们的组成和结构相似.
- 与TAPB-BD(OMe) 2-H相比,TFPB-BD(OMe) 2-H显示出明显更强的ECL排放,而TAPB-BD(OMe) 2-H则显示出明显更强的ECL排放.
- 在TFPB-BD(OMe) 2-H中,增强的ECL归因于较强的极性相互作用,不均的电荷分布,以及有序的结合骨,以促进电荷运输.
- TFPB-BD ((OMe) 2-H显示了更小的带隙能量和更强的极化,有利于更强的ECL信号的电荷迁移.
- 基于高级COF的ECL传感器实现了对As{V}的敏感检测,具有超低的检测极限.
结论:
- 在COF中的结构异构极大地影响了它们的ECL性能.
- 较强的极性相互作用和高效的电荷传输路径增加了ECL的排放.
- 开发的COF为设计高效的ECL材料和传感器提供了一个有前途的平台.
- 这项研究为新型ECL有机发光器的合理设计提供了宝贵的见解.
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