Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Adv Sci (Weinh). 2022 Jan;9(2):e2102739. doi: 10.1002/advs.202102739. Epub 2021 Nov 7.
The design of sensor array members with synchronous fluorescence and photostability is crucial to the reliable performance of sensor arrays in multiple detections and their service life. Herein, a strategy is reported for achieving synchronous fluorescence and photostability on two coassemblies fabricated from carbazole-based energy donor hosts and a photostable energy acceptor. When a small number of the same energy acceptors are embedded into two carbazole-based energy donor hosts, the excitation energy of the donors can be efficiently harvested by the acceptors through long-range exciton migration and Förster resonance energy transfer (FRET) to achieve synchronous fluorescence and photostability in both coassemblies. More intriguingly, the synchronous photostability substantially improves the multiple discrimination capacity (e.g., 10 times more discriminations of TNT in two coassemblies have been achieved compared to the sensor array comprising two individual donor assemblies) and the working lifetime of the sensor array. The concept of optical synchronization (i.e., emission and photostability) of sensor array members can be extended to other sensor arrays for the steady multiple detection of certain hazardous chemicals.
传感器阵列成员的设计具有同步荧光和光稳定性对于传感器阵列在多次检测及其使用寿命中的可靠性能至关重要。本文报道了一种策略，通过将基于咔唑的供体主体和光稳定的受体构建两个共组装体来实现同步荧光和光稳定性。当少量相同的受体嵌入两个基于咔唑的供体主体中时，供体的激发能量可以通过受体的长程激子迁移和Förster 共振能量转移（FRET）有效地被受体收集，从而在两个共组装体中实现同步荧光和光稳定性。更有趣的是，同步光稳定性显著提高了多重分辨能力（例如，与由两个单独的供体组装体组成的传感器阵列相比，两个共组装体中 TNT 的分辨能力提高了 10 倍）和传感器阵列的工作寿命。传感器阵列成员的光学同步（即发射和光稳定性）的概念可以扩展到其他传感器阵列，以稳定地对某些危险化学品进行多次检测。
