Abstract
A water-soluble fluorescent pH sensor of 9-amino-10-methylacridinium chromophore with the 2-(diethylamine)ethyl chain as a receptor shows an "off-on" response going from basic to acidic solution. Photoinduced electron transfer has been directly demonstrated to be the quenching mechanism by the observation of the long-lived acridinyl radical. The interaction of the protonated sensor with anionic micelles causes a significant increase in the detection sensitivity of pH.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Aminacrine / analogs & derivatives*
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Aminacrine / chemistry
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Anions
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Electron Transport
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Electrons*
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Fluorescent Dyes / analysis
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Fluorescent Dyes / chemical synthesis*
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Free Radicals / chemistry
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Hydrogen-Ion Concentration
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Micelles*
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Molecular Structure
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Protons*
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Solutions
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Water / chemistry*
Substances
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Anions
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Fluorescent Dyes
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Free Radicals
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Micelles
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Protons
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Solutions
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Water
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Aminacrine
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9-amino-10-methylacridinium