Abstract
New temperature - and polarity-sensitive dye probes were synthesized, which demonstrate intramolecular energy transfer from excited violet pyrene chromophore to green dansyl chromophore. Fluorescence of these dye probes is highly sensitive to environment polarity changes. The intramolecular energy transfer efficiencies of these dye probes increase from 55.0% in nonpolar solvent environment to 95.3% in polar solvent environment. The emitting-light colors of these dye probes change from blue in nonpolar solvent environment to yellow in polar solvent environment. These dye probes demonstrate highly temperature-sensitive fluorescence changes due to intramolecular energy transfer ON/OFF under environment cooling/heating condition. Fluorescence intensity of these dye probes significantly changes with environment temperature. Dynamic Diels-Alder covalent bonds enable dye exchange and conversion to achieve structurally optimized emitting-lighting probes.
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