A donor-acceptor cage for circularly polarized TADF emission

Lihua Chen; Chenfei Li; Zheng-Fei Liu; Yoshiaki Kuboi; Enguang Fu; Lydia Sosa Vargas; Chihaya Adachi; Fabrice Mathevet; Shaodong Zhang

doi:10.1039/d3cc05136f

A donor-acceptor cage for circularly polarized TADF emission

Chem Commun (Camb). 2024 Feb 8;60(13):1758-1761. doi: 10.1039/d3cc05136f.

Authors

Lihua Chen¹, Chenfei Li¹, Zheng-Fei Liu², Yoshiaki Kuboi¹, Enguang Fu¹, Lydia Sosa Vargas³, Chihaya Adachi⁴, Fabrice Mathevet^{4

3}, Shaodong Zhang¹

Affiliations

¹ School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China. sdzhang@sjtu.edu.cn.
² Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
³ Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM 4 place Jussieu, Paris 75005, France.
⁴ Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan. adachi@cstf.kyushu-u.ac.jp.

PMID: 38251830
DOI: 10.1039/d3cc05136f

Abstract

Herein, we report the first example of chiral donor-acceptor cage DA-2 displaying efficient circularly polarized thermally activated delayed fluorescence (CP-TADF) with |g_lum| values up to 2.1 × 10^-3 and PLQY of 32%. A small ΔE_ST of 0.051 eV and quasi-parallel (θ = 6°) transition electric and magnetic dipole moments were realized from the through-space charge transfer interaction between the parallelly aligned donor and acceptor in DA-2. This D-A cage configuration has provided a novel design strategy for discovering potential efficient CP-TADF emitters.