A new dicyanophenanthrene-based thermally activated delayed fluorophore: Design, synthesis, photophysical study, and electroluminescence application

Wen-Cheng Chen; Xiao-Long Liu; Qiang Liu; Fan Zheng; Longjiang Xing; Qiao-Er Wu; Zi-Xian Lian; Pei-Yan Zheng; Yuzhen Zhang; Shaomin Ji; Yanping Huo

doi:10.1016/j.saa.2024.124808

A new dicyanophenanthrene-based thermally activated delayed fluorophore: Design, synthesis, photophysical study, and electroluminescence application

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Dec 5:322:124808. doi: 10.1016/j.saa.2024.124808. Epub 2024 Jul 10.

Authors

Affiliations

¹ Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, PR China; School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, PR China. Electronic address: [email protected].
² Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, PR China; School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, PR China.
³ School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, PR China.
⁴ Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang, PR China; School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, PR China; Analytical & Testing Center, Guangdong University of Technology, Guangzhou, PR China. Electronic address: [email protected].

PMID: 39024786
DOI: 10.1016/j.saa.2024.124808

Abstract

A novel thermally activated delayed fluorescence (TADF) emitter, DCNP-SCF, is developed based on a dicyanophenanthrene acceptor. DCNP-SCF is prepared by a simple C-N coupling reaction. Its thermal, theoretical, photophysical, and electroluminescent properties are investigated, emphasizing its potential in organic electroluminescence devices. DCNP-SCF demonstrates highly distorted donor-acceptor conformation, facilitating significant TADF for efficient triplet harvesting in electroluminescence devices. Additionally, due to the moderate electron push-pull effect, DCNP-SCF exhibits appropriate intramolecular charge transfer for considerable photoluminescence quantum yield for electroluminescence applications.

Keywords: Dicyanophenanthrene; Electroluminescence; Intramolecular charge transfer; Organic light-emitting device; Thermally activated delayed fluorescence.