【摘 要】
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Main observation and conclusionrnExcited-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 solve
【机 构】
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Key Laboratory of Separation Science for Analytical Chemistry,Dalian Institute of Chemical Physics,C
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Main observation and conclusionrnExcited-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 re-search,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.
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