Volume 39, Issue 5 pp. 1113-1120
Concise Report

Sensing Mechanism of Excited-State Intermolecular Hydrogen Bond for Phthalimide: Indispensable Role of Dimethyl Sulfoxide

Dongdong Wang

Dongdong Wang

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

These authors contributed equally to this work.

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Tianxin Bai

Tianxin Bai

Institute of Molecular Sciences and Engineering, Shandong University, Qingdao, Shandong, 266237 China

These authors contributed equally to this work.

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Xue Wang

Xue Wang

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

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Yuting Xiong

Yuting Xiong

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

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Yahui Zhang

Yahui Zhang

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

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Zhenqiang Shi

Zhenqiang Shi

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

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Fusheng Zhang

Fusheng Zhang

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

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Wenqi Lu

Wenqi Lu

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

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Guangyan Qing

Corresponding Author

Guangyan Qing

Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023 China

College of Chemistry and Chemical Engineering, Wuhan Textile University, 1 Sunshine Road, Wuhan, Hubei, 430200 China

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First published: 14 December 2020
Citations: 4

Main observation and conclusion

Excited-state hydrogen bond strongly affects the intramolecular charge conversion process, which is very suitable for the design and development of high-performance fluorescent probes. However, as one of the most common solvents or additives used in sensing, the role of dimethyl sulfoxide (DMSO) in the system of the excited-state hydrogen bond is seldom explored. As the goal of this research, we investigated the sensing mechanism of a CORM3-green fluorescent probe system for carbon monoxide releasing molecule (CORM-3) detection and tracking in vivo, through quantum chemistry calculations based on density-functional-theory (DFT)/ time-dependent density-functional-theory (TDDFT) methods. Based on the analysis of the solvent effect of DMSO by the reduced density gradient function and IR spectroscopy, we provided a new strategy to explain the fluorescence mechanism. Subsequently, we verified the result through the potential energy curve of Phthalimide (PTI, the reduced product of CORM3-green). The excited-state hydrogen bond between PTI and DMSO promotes radiation transition and leads to obvious difference in the photophysical properties of PTI and PTI-DMSO.image

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