A proton sponge-based fluorescent switch |
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| Authors: | Yi Xiao Meiyan Fu Jingnan Cui |
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| Institution: | a State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, PR China
b Shanghai Key Laboratory of Chemical Biology, East China University of Science and Technology, Shanghai 200237, PR China |
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| Abstract: | A proton-triggered fluorescent switch was developed through direct connection of a proton sponge, 1,8-bis(dimethylamino)naphthalene to a fluorophore, 4-aminonaphthalimide. The molecular fluorescent switch was based on a photoinduced electron transfer (PET) mechanism. The fluorescent switch exhibited significant fluorescence enhancement upon binding the low-concentration protons in high pH aqueous solution. The high pKa value (around 11) of the fluorescent switch could be ascribed to the nature of the proton sponge. |
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| Keywords: | Fluorescent switch Proton sponge Photoinduced electron transfer |
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