Competition between Arene-Perfluoroarene and Charge-Transfer Interactions in Organic Light-Harvesting Systems

Yanqiu Sun; Yilong Lei; Liangsheng Liao; Wenping Hu

doi:10.1002/anie.201702084

Competition between Arene-Perfluoroarene and Charge-Transfer Interactions in Organic Light-Harvesting Systems

Angew Chem Int Ed Engl. 2017 Aug 21;56(35):10352-10356. doi: 10.1002/anie.201702084. Epub 2017 May 19.

Authors

Yanqiu Sun^{1

2}, Yilong Lei³, Liangsheng Liao⁴, Wenping Hu^{1

5}

Affiliations

¹ Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P.R. China.
² University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.
³ Institute of Molecular Functional Materials, Department of Chemistry and Institute of Advanced Materials, Hong Kong Baptist University, Waterloo Road, Hong Kong, P.R. China.
⁴ Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P.R. China.
⁵ Key Laboratory of Molecular Optoelectronic Sciences, School of Science, Tianjin University & Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, P.R. China.

PMID: 28523729
DOI: 10.1002/anie.201702084

Abstract

Two typical types of luminescent organic cocrystals comprising pyrene-octafluoronaphthalene (pyrene-OFN) and pyrene-1,2,4,5-tetracyanobezene (pyrene-TCNB) were developed by a simple supramolecular assembly strategy. The cocrystals exhibit distinct optical properties because of their different intermolecular interaction modes; that is, arene-perfluoroarene (AP) and charge-transfer (CT) interactions. Unexpectedly, a pyrene-TCNB system with strong CT interactions was incorporated into a pyrene-OFN host as a robust guest to generate white-light emission (WLE). In the supramolecular cocrystal system, an efficient energy-transfer process from pyrene-OFN to pyrene-TCNB occurred because of the well-matched spectra of the constituents and a desirable energy donor/acceptor (D/A) distance. The present competitive intermolecular interaction strategy could be applied to the fabrication of more complicated organic light-harvesting systems.

Keywords: arene-perfluoroarene complexes; charge-transfer systems; cocrystals; energy transfers; organic light-harvesting systems.

Publication types

Research Support, Non-U.S. Gov't