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用于单分子成像和检测的明亮长时间光二极管的合理设计

Laura Kacenauskaite¹, Niels Bisballe¹, Rebecca Mucci¹

¹Nano-Science Center & Department of Chemistry, University of Copenhagen Universitetsparken 5, 2100 Copenhagen, Denmark.

Journal of the American Chemical Society

|January 11, 2021

概括

研究人员开发了明亮的,长时间的光二极管光体,用于单分子检测. 这些新型染料结合了烯天线和三角发射器,显著提高了在具有挑战性的环境中成像的亮度.

科学领域:

化学物理
生物物理
材料科学

背景情况:

先进的光显微镜需要明亮,光稳定的光体来检测单分子.
长光寿命的光体在时间分辨率成像中具有优势,但通常具有较低的摩尔吸收系数,限制了它们的使用.
开发具有高亮度和长光寿命的光体对于克服成像挑战至关重要.

研究的目的:

创建一种通用方法来合成明亮的,长时间的光二极管光体.
提高长光寿命发射器单分子成像的分子吸收系数.
在复杂的生物或物质环境中开发适合检测单个分子的新型光体.

主要方法:

通过将烯天线染色体连接到三角发射器来合成二化.
使用高效的Förster共振能量转移 (FRET) 从烯输送器到三角接收器.
描述了光物理特性,包括光寿命,量子产量和摩尔吸收系数.

主要成果:

从烯天线到三角发射器实现了100%的能量传输效率.
由此产生的二极管保留了发射器的长光寿命 (~17 ns) 和高量子产量 (75%).
与自由三角染料相比,烯天线增加了多达5倍的摩尔吸收系数,显著提高了亮度.

结论:

开发的二呈现出增强的亮度,并保持长光寿命.
这些新型光体能够通过基于生命周期的成像技术对单个分子进行敏感的检测和分辨.
这种通用方法为要求光显微镜应用设计先进的光体提供了途径.

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