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Enhanced Thermally Activated Delayed Fluorescence in New Fluorescein Derivatives By Introducing Aromatic Carbonyl Groups
Author(s) -
Wu Yingnan,
Song Fengling,
Luo Wenfang,
Liu Zhiwei,
Song Bo,
Peng Xiaojun
Publication year - 2017
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201600027
Subject(s) - thiophene , intersystem crossing , fluorescence , photochemistry , chemistry , derivative (finance) , fluorescein , organic chemistry , excited state , physics , quantum mechanics , nuclear physics , singlet state , financial economics , economics
In this work, two new fluorescein derivatives which exhibit thermally activated delayed fluorescence (TADF) were rationally designed and synthesized by introducing aromatic carbonyl groups to increase the rate of intersystem crossing. The TADF properties of one of two compounds (the thiophene‐containing derivative) were found to be additionally enhanced as a result of the presence of the thiophene moieties, with the compound having a TADF lifetime of 52.05 μs in deaerated ethanol. The thiophene‐containing derivative was used in time‐resolved luminescence imaging of MCF‐7 cells.