Polymorph-Dependent Thermally Activated Delayed Fluorescence Emitters: Understanding TADF from a Perspective of Aggregation State

Kailu Zheng; Fan Ni; Zhanxiang Chen; Cheng Zhong; Chuluo Yang

doi:10.1002/anie.201913210

Polymorph-Dependent Thermally Activated Delayed Fluorescence Emitters: Understanding TADF from a Perspective of Aggregation State

Angew Chem Int Ed Engl. 2020 Jun 15;59(25):9972-9976. doi: 10.1002/anie.201913210. Epub 2019 Dec 13.

Authors

Kailu Zheng^{1

2}, Fan Ni², Zhanxiang Chen¹, Cheng Zhong¹, Chuluo Yang^{1

2}

Affiliations

¹ Renmin Hospital of Wuhan University, Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China.
² Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.

PMID: 31710142
DOI: 10.1002/anie.201913210

Abstract

Current research on thermally activated fluorescence (TADF) emitters is mainly based on the molecular levels, while the aggregation states of TADF emitters are to be explored deeply. Now two multifunctional emitters are reported with simultaneous TADF, aggregation induced emission (AIE), and multicolor mechanochromic luminescence (MCL) features. Both emitters also show polymorph-dependent TADF emission. Crystal structure analysis reveals that the polymorphism is ascribed to the mutable conformations in different aggregation states. This work brings new insight to TADF emitters from a perspective of aggregation states.

Keywords: aggregation state; aggregation-induced emission; delayed fluorescence; multicolor-mechanochromic luminescence; polymorphism.

Abstract

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