Host–Guest Cocrystal Enabling Efficient Electrochemiluminescence Based on Thermally Activated Delayed Fluorescence

Feng Zheng, Mingxin Liu, Yijiang Li*, Jinliu Wei, Xiaoping Chen, Jiancong Ni and Zhixiong Cai*, 
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引用次数: 0

Abstract

Thermally activated delayed fluorescence (TADF) materials have garnered significant attention for their capacity to augment electrochemiluminescence (ECL). In this work, three kind of host–guest cocrystals were prepared by incorporating dicyanobenzene (DCB) derivatives as acceptor guests within calix[3]acridan (C[3]A) as donor host. Notably, the ECL signals of C[3]A@o-DCB were significantly stronger than those of C[3]A@p-DCB and C[3]A@m-DCB, attributed to enhanced intermolecular charge transfer (ISCT). Mechanistic investigation, supported by DFT calculations, reveals that the physically separated yet spatially proximate D–A configuration promotes efficient ISCT, leading to enhanced ECL. This study provides insights in designing TADF host–guest cocrystals with favorable properties for ECL.

Abstract Image

基于热激活延迟荧光的主客体共晶实现高效电化学发光
热激活延迟荧光(TADF)材料因其增强电化学发光(ECL)的能力而引起了人们的极大关注。本研究以二氰苯(DCB)衍生物为受体客体,在杯状体bb[3] (C[3]A)为供体主体内制备了三种主客体共晶。值得注意的是,C[3]A@o-DCB的ECL信号明显强于C[3]A@p-DCB和C[3]A@m-DCB,这是由于分子间电荷转移(ISCT)增强所致。在DFT计算的支持下,力学研究表明,物理上分离但空间上接近的D-A配置促进了有效的ISCT,从而增强了ECL。该研究为设计具有良好ECL性能的TADF主客体共晶提供了见解。
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来源期刊
ACS Applied Optical Materials
ACS Applied Optical Materials 材料科学-光学材料-
CiteScore
1.10
自引率
0.00%
发文量
0
期刊介绍: ACS Applied Optical Materials is an international and interdisciplinary forum to publish original experimental and theoretical including simulation and modeling research in optical materials complementing the ACS Applied Materials portfolio. With a focus on innovative applications ACS Applied Optical Materials also complements and expands the scope of existing ACS publications that focus on fundamental aspects of the interaction between light and matter in materials science including ACS Photonics Macromolecules Journal of Physical Chemistry C ACS Nano and Nano Letters.The scope of ACS Applied Optical Materials includes high quality research of an applied nature that integrates knowledge in materials science chemistry physics optical science and engineering.
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