한빛사 논문
Weijie Chi,†,# Jie Chen,‡,# Wenjuan Liu,‡,# Chao Wang,†,‡ Qingkai Qi,‡ Qinglong Qiao,‡ Tee Meng Tan,† Kangming Xiong,‡ Xiao Liu,§ Keegan Kang,† Young-Tae Chang,§,* Zhaochao Xu,‡,* Xiaogang Liu†,*
†Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road 487372, Singapore
‡CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road, Dalian 116023, China
§Department of Chemistry, POSTECH & Center for Self-assembly and Complexity, IBS, Pohang 37673, Republic of Korea
#These authors contributed equally.
*Corresponding author
Abstract
Photoinduced electron transfer (PET) is one of the most important mechanisms for developing fluorescent probes and biosensors. Quantitative prediction of the quantum yields of these probes and sensors is crucial to accelerate the rational development of novel PET-based functional materials. Herein, we developed a general descriptor (ΔE) for predicting the quantum yield of PET probes, with a threshold value of ∼0.6 eV. When ΔE < ∼0.6 eV, the quantum yield is low (mostly <2%) due to the substantial activation of PET in polar environments; when ΔE > ∼0.6 eV, the quantum yield is high because of the inhibition of PET. This simple yet effective descriptor is applicable to a wide range of fluorophores, such as BODIPY, fluorescein, rhodamine, and Si-rhodamine. This ΔE descriptor enables us not only to establish new applications for existing PET probes but also to quantitatively design novel PET-based fluorophores for wash-free bioimaging and AIEgen development.
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