混合平面扭曲椅子形状的印素捐赠器,使得明亮的分子和聚合状态近红外辐射
Qiqi Xu1, Ying Wang1,2, Yiyan Guan3
1Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China.
一种新型的椅子形的印林输出器 (cID) 能够在各种状态中发出明亮的近红外 (NIR) 辐射,克服了先进应用中常规有机光体的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
- 生物医学工程 生物医学工程
背景情况:
- 有机近红外 (NIR) 光体具有捐赠者-接受者 (D-A) 架构对于光电子和生物医学用途至关重要.
- 传统的D-A NIR发射器面临着诸如聚合诱导的火和由于捐赠单位结构 (平面或高度扭曲) 的弱吸收等挑战.
- 这些局限性阻碍了NIR光体在分子和聚合状态的多功能实用性.
研究的目的:
- 在各种状态中开发具有增强亮度和稳定性的新型NIR光体.
- 引入一种独特的椅子形印林输送器 (cID),具有混合平面扭曲形状,以改善NIR发射特性.
- 探索这些新型光体在成像和材料检测等先进应用中的潜力.
主要方法:
- 设计和合成纳米射线光体,其中包含一种新的椅子形的印素供体 (cID).
- 光物理性质的表征,包括辐射光谱,量子产量和溶液中的亮度,固态,微球,纳米粒子和薄膜.
- 评估影响排放的因素,如HOMO-LUMO能量差距,振荡器强度,重组能量和黄瑞斯因子.
- 在多孔陶损伤检测,刺激排放耗尽 (STED) 显微镜和NIR-II血管成像中应用的演示.
主要成果:
- 该cID捐赠者促进了跨越不同州的650-1200纳米 (尾巴到1600纳米) 的明亮的NIR辐射.
- cID促进了电子定位,导致更高的振荡器强度,更小的HOMO-LUMO间隙,增强的光采集和红移发射.
- 在cID中,硬质阻碍有效抑制了非辐射衰变,由减少的重组能量和黄瑞斯因子证明.
- π-结合扩展导致了强大的NIR-I (PLQY高达67.8%,亮度高达15668M-1cm-1) 和NIR-II发射.
- 在材料损伤检测,STED显微镜和血管成像方面展示了成功的应用.
结论:
- 椅子形的印林供体 (cID) 是一种多功能构建块,用于创建高性能NIR光体.
- 这些新的NIR光体在各种状态下表现出明亮的发射和稳定性,克服了传统DA系统的局限性.
- 开发的光体显示出先进的生物医学成像和光电子应用的巨大潜力.
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