Hetero-bichromophore Dyad as a Highly Efficient Triplet Acceptor for Polarity Tuned Triplet-Triplet Annihilation Upconversion

Ya Liu; Kepeng Chen; Songqiu Yang; Daoyuan Zheng; Guanghua Ren; Yang Yang; Jianzhang Zhao; Donghui Wei; Keli Han

doi:10.1021/acs.jpclett.9b01454

Hetero-bichromophore Dyad as a Highly Efficient Triplet Acceptor for Polarity Tuned Triplet-Triplet Annihilation Upconversion

J Phys Chem Lett. 2019 Aug 1;10(15):4368-4373. doi: 10.1021/acs.jpclett.9b01454. Epub 2019 Jul 22.

Authors

Ya Liu^{1

2}, Kepeng Chen³, Songqiu Yang¹, Daoyuan Zheng^{1

2}, Guanghua Ren^{1

2}, Yang Yang¹, Jianzhang Zhao³, Donghui Wei⁴, Keli Han^{1

5}

Affiliations

¹ State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , 457 Zhongshan Road , Dalian 116023 , People's Republic of China.
² University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China.
³ State Key Laboratory of Fine Chemicals, School of Chemical Engineering , Dalian University of Technology , E-208 West Campus, 2 Ling Gong Road , Dalian 116024 , People's Republic of China.
⁴ College of Chemistry and Molecular Engineering , Zhengzhou University , 100 Science Avenue , Zhengzhou 450000 , People's Republic of China.
⁵ Institute of Molecular Sciences and Engineering , Shandong University , Qingdao 266000 , People's Republic of China.

PMID: 31310130
DOI: 10.1021/acs.jpclett.9b01454

Abstract

Triplet-triplet annihilation upconversion (TTA UC) was intensively investigated for developing efficient photosensitizers and emitters. But an emission wavelength tunable TTA UC system with only one emitter was rarely reported. A novel hetero-bichromophore dyad, HB-An, showing solvatochromic emission and high fluorescence quantum yields in weakly polar solvents (such as n-hexane, dichloromethane (DCM), and so on) was used as triplet energy acceptor/emitter for polarity tuned TTA UC. A high TTA UC quantum yield up to 25% was achieved and the UC emission wavelengths can be fine-tuned from cyan to yellow by changing the media polarity. This information will be useful for constructing efficient emitting-light-tunable TTA UC system.