Anomalous fluorescent responses of 9-fluorenecarboxamide derivatives possessing benzo-15-crown-5. |
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| Authors: | Hiroya Hama Tatsuya Morozumi Hiroshi Nakamura |
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| Affiliation: | Division of Environmental Material Science, Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan. |
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| Abstract: | A new fluorescent ionophore for alkaline earth metal ions, 4'-(9-fluorenecarboxamido)benzo-15-crown-5 (3), was synthesized; its photochemical behavior was investigated using UV, fluorescence, (1)H NMR, and (13)C NMR spectrometry. In the absence of a metal ion, the fluorene moiety showed weak fluorescence emission (fluorescence "Off" state). However, complexation with metal ions greatly enhanced the fluorescence intensity (fluorescence "On" state). |
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