Colorimetric and fluorimetric fluoride sensing
AssigneeThe Florida State University Research Foundation, Inc.
InventorsSourav Saha, Samit Guha
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Abstract
The present invention generally relates to fluoride receptor reagent compounds that are derived from one or more N-aryl or heteroaryl substituted 1,4,5,8-naphthalenetetracarboxydiimide (NDI) units. The invention also relates to associated methods for the detection of fluoride in a composition. π-electron orbitals present in the NDI unit of the reagents form a complex with fluoride anions. It is believed that the anion-π interaction results in a charge transfer process between the fluoride anion and the NDI unit, resulting in a number of measurable effects (e.g., colorimetric response).
Claims13
A method for detecting fluoride anion (F−) in a material comprising:
- contacting the material with a fluoride receptor reagent to form a complex involving anion-π interactions, wherein the fluoride receptor reagent comprises an N-aryl or heteroaryl derivative of 1,4,5,8-naphthalenediimide (NDI) having the formula (I):
- wherein R1 comprises a substituted or unsubstituted aryl or heteroaryl moiety;
- and R2 is independently a substituted or unsubstituted aryl or heteroaryl moiety, or R2 comprises a second NDI moiety comprising a second NDI unit and having the formula:
- wherein R3 is a linking group connecting the second NDI unit to the nitrogen atom of formula (I) and comprising a substituted or unsubstituted aryl or heteroaryl moiety;
- and R4 is independently a substituted or unsubstituted aryl or heteroaryl moiety, and
- detecting the presence of fluoride anions as indicated by a colorimetric or fluorometric response.
Dependencies are inferred from the claim text.