基于冠状链压缩的AIE活性,刺激响应的光二维块共聚物纳米小板
Shixing Lei1,2, Jia Tian1, Yuetong Kang1
1Department of Chemistry, University of Victoria, Victoria, British Columbia V8P 5C2, Canada.
Journal of the American Chemical Society
|September 15, 2022
概括
研究人员使用结晶驱动自组装开发了统一的,可调整尺寸的聚合诱导发射 (AIE) 纳米板块. 这些AIE纳米粒子作为敏感的"启动"传感器来检测具有高选择性和低检测极限的离子.
科学领域:
- 纳米科学和材料科学
- 超分子化学
- 聚合物化学
背景情况:
- 聚合诱导辐射 (AIE) 材料在凝聚状态下提供增强的发光,但实现明确的,统一的纳米粒子仍然是一个挑战.
- 可定制和均的AIE活性纳米粒子对于传感和成像的先进应用至关重要.
研究的目的:
- 开发一种可调整尺寸和统一的AIE活性2D纳米板块的方法.
- 研究这些纳米血小板的形成机制及其反应性质.
- 展示这些AIE纳米板块作为重金属离子检测的敏感传感器的潜力.
主要方法:
- 使用种子生长,活体结晶驱动自组合 (CDSA) 的两块共聚物 (BCPs).
- 具有可结晶的核心形成块和冠状形成块的工程BCP与四乙烯 (TPE) AIE组功能化.
- 通过对纳米血小板形成的溶恐惧症诱导了1D到2D形态过渡.
主要成果:
- 成功制备了可调整尺寸的,均的AIE活性2D纳米血小板.
- 由AIE纳米板块产生的被证明是溶剂反应的光辐射.
- 开发了用于Hg(II) 检测的"启动"概念验证传感器,具有快速响应,高选择性和低检测极限 (5-125 × 10-9 M).
- 观察到非线性光强度依赖于分析物度和与纳米血小板面积的相关性,这表明涉及限制分子内运动 (RIM) 的合作机制.
结论:
- 种子生长CDSA方法可以精确控制AIE活性BCP纳米血小板的尺寸和形态.
- 开发的AIE纳米血小板是Hg(II) 离子检测的有效和敏感平台.
- 观察到的光反应机制与BCP冠状体内的硬质压缩和RIM效应有关.
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