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A novel fluorescence enhancing F - probe based on intermolecular energy transfer |
| Quanguo WANG,Yubin DING,Weihong ZHU,Yongshu XIE, |
| Key Laboratory for Advanced
Materials and Institute of Fine Chemicals, East China University of
Science and Technology, Shanghai 200237, China; |
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Abstract A supramolecular fluorescent sensor of F− based on intermolecular energy transfer is described. The maximum absorption wavelength of a pyrrolic compound 1 is 472 nm, which is coincident with the emission wavelength of a dipyridylamine-anthracene compound 2. In the CH2Cl2 solution of 1 and 2, the fluorescence of 2 was quenched because of the presence of intermolecular energy transfer from 2 to 1. When F− was added to this solution, the absorption maximum wavelength of 1 shifted from 472 to 594 nm due to a deprotonation process. Simultaneously, the fluorescence of 2 was recovered because of the interruption of the intermolecular energy transfer. Based on these observations, the combination of 1 and 2 can be regarded as a novel supramolecular fluorescence enhancing F− probe.
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| Keywords
fluoride sensor
intermolecular energy transfer
fluorescence enhancement
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Issue Date: 05 June 2010
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