Persistent organic room temperature phosphorescence: what is the role of molecular dimers?

Yunsheng Wang; Jie Yang; Yu Tian; Manman Fang; Qiuyan Liao; Liwei Wang; Wenping Hu; Ben Zhong Tang; Zhen Li

doi:10.1039/c9sc04632a

Persistent organic room temperature phosphorescence: what is the role of molecular dimers?

Chem Sci. 2019 Nov 25;11(3):833-838. doi: 10.1039/c9sc04632a.

Authors

Yunsheng Wang¹, Jie Yang¹, Yu Tian¹, Manman Fang¹, Qiuyan Liao², Liwei Wang¹, Wenping Hu¹, Ben Zhong Tang^{1

3}, Zhen Li^{1

2

4}

Affiliations

¹ Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Institute of Molecular Aggregation Science, Tianjin University Tianjin 300072 China [email protected] [email protected].
² Department of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University Wuhan 430072 China [email protected].
³ Department of Chemistry, The Hong Kong University of Science & Technology Clear Water Bay Kowloon Hong Kong [email protected].
⁴ Joint School of National University of Singapore, Tianjin University, International Campus of Tianjin University Binhai New City Fuzhou 350207 China.

Abstract

Molecular dimers have been frequently found to play an important role in room temperature phosphorescence (RTP), but its inherent working mechanism has remained unclear. Herein a series of unique characteristics, including singlet excimer emission and thermally activated delayed fluorescence, were successfully integrated into a new RTP luminogen of CS-2COOCH₃ to clearly reveal the excited-state process of RTP and the special role of molecular dimers in persistent RTP emission.