Achieving high singlet-oxygen generation by applying the heavy-atom effect to thermally activated delayed fluorescent materials.

Ya-Fang Xiao Jia-Xiong Chen Wen-Cheng Chen Xiuli ZhengChen CaoJihua TanXiao CuiZhanxiang YuanShaomin JiGuihong LuWeimin Liu Pengfei Wang Shengliang Li Chun-Sing Lee

Published in: Chemical communications (Cambridge, England) (2021)

A bromine-substituted thermally activated delayed fluorescent (TADF) molecule AQCzBr2 is designed with both small singlet-triplet splitting (ΔEST) and increased spin-orbit coupling (SOC) to boost intersystem crossing (ISC) for singlet oxygen generation. AQCzBr2 nanoparticles (NPs) demonstrate high productivity of singlet oxygen generation (ΦΔ = 0.91) which allows highly efficient photodynamic therapy toward cancer cells.

Keyphrases

highly efficient
energy transfer
photodynamic therapy
quantum dots
living cells
climate change
molecular dynamics
molecular docking
label free
single molecule
molecular dynamics simulations
light emitting
oxide nanoparticles
walled carbon nanotubes