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US 11,199,497 B2Granted
Fluorescent compounds as sensing agents
AssigneeOhio Northern University
InventorJake R. Zimmerman
Life of this patent
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Abstract
A method may comprise: exposing a substituted chromone dissolved in a solvent to a sample; taking a fluorescence measurement of the sample after exposure to the substituted chromone; and determining a presence or absence of one or more ions in the sample, a concentration of the one or more ions in the sample, or both based on the fluorescence measurement.
Claims10
A composition comprising:
- Compound 1, wherein R1 is methyl acetate or methyl (2,2-dimethyl) acetate, R2 is hydroxymethylene, (4-methylphenylsulfonamido)methylene, or ((4-methoxyphenyl)sulfamido)methylene, R3 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R4 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, and R5 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl
Dependencies are inferred from the claim text.