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通过增强的短距离三重能量传输来增强染料敏感的发光

Fei Zhao¹, Jialing Hu¹, Daoming Guan¹

¹Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200438, China.

Advanced materials (Deerfield Beach, Fla.)

|August 11, 2023

概括

研究人员使用一种新的染料敏感化策略增强了基于胺的上转换发光 (UCN). 这种方法通过优化从有机染料到纳米颗粒中的离子的能量转移,显著提高了UCN效率.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
摄影化学的使用

背景情况:

染料敏感化增强了基于兰化物的上转换发光 (UCN).
在UCNP中,从有机染料到离子 (Yb3+) 的界面能量转移可能是限制因素.
优化能量传输途径对于高效的UCN至关重要.

研究的目的:

通过修改染料结构和最小化染料和Yb3+之间的距离来克服染料敏感的UCN的局限性.
开发一个高效的染料敏感的UCN系统,使用专门设计的近红外 (NIR) 染料.
为了证明这种策略对不同的NIR染料和激发波长的适用性.

主要方法:

设计一个近红外 (NIR) 染料,二硫-绿 (二硫-ICG),作为一个天线分子.
将染料与上转化纳米粒子 (UCNPs) 结合,并将距离Yb3+离子的距离最小化.
在808nm和730nm激发下,研究从染料的三元状态 (T1) 到Yb3+的能量转移效率.

主要成果:

在808nm激发下,通过二硫-ICG实现了发光的2413倍增加.
从二硫-ICG到Yb3+的高能量转移效率 (72.1%) 被观察到,主要来自染料的三重状态.
在730nm激发下,Cy7-SO3敏感化系统的发光度被证明增强了52倍.
染料敏感化的升级转换增强在单颗粒水平上得到证实.

结论:

修改协调位点并将染料-Yb3+距离最小化,显著提高了染料敏感的UCN效率.
开发的策略有效地利用NIR染料的三重状态,以实现高效的能量传输.
这种方法扩大了NIR染料用于UCN敏感化的范围,并为高效的UCN系统开辟了新的途径.

关键词:

染料敏感化的染料转移能量转移能量是什么?兰他化物兰他化物接近红外的染料.上升转换的发光效应

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