Method for producing an ionic sensor
First Claim
1. A method of making an ionic sensor comprising:
- (a) contacting a water-swellable ion-permeable matrix material with an aqueous-based bath of a sensing component, or precursor thereof, under conditions effective to covalently attach the sensing component, or precursor thereof, to the water-swellable ion-permeable matrix material;
wherein the aqueous-based bath comprises water and an organic solvent in an amount effective to solubilize the sensing component, or precursor thereof;
(b) contacting the water-swellable ion-permeable matrix material having covalently attached sensing component, or precursor thereof, with an aqueous solution having a pH of at least about 10 and an ionic strength of at least about that of a 5% aqueous sodium chloride solution to form a sensing element; and
(c) coveting the sensing element with an opaque overcoat material.
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Abstract
The present invention provides processes for the preparation of ionic sensors that include a matrix material, such as ion-permeable cellulose, having a sensing component included therein, such as a fluorescent dye, and an opaque overcoat material. For example, the present invention provides a method of making an ionic sensor comprising: contacting a water-swellable ion-permeable matrix material with an aqueous-based bath of a sensing component, or precursor thereof, under conditions effective to covalently attach the sensing component, or precursor thereof, to the water-swellable ion-permeable matrix material; wherein the aqueous-based bath comprises water and an organic solvent in an amount effective to solubilize the sensing component, or precursor thereof; contacting the water-swellable ion-permeable matrix material having covalently attached sensing component, or precursor thereof, with an aqueous solution having a pH of at least about 10 and an ionic strength of at least about that of a 5% aqueous sodium chloride solution to form a sensing element; and covering the sensing element with an opaque overcoat material. Also provided is a method of making a precursor to a preferred sensing component, i.e., acetoxypyrenetris(sulfonyl)chloride, which is made using a thionyl chloride method. If the sensing component is attached to the matrix material using amine groups, any unreacted amine groups can be capped by contacting them with a solution comprising an acetylating agent, an organic amine, and an ethereal solvent.
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Citations
17 Claims
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1. A method of making an ionic sensor comprising:
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(a) contacting a water-swellable ion-permeable matrix material with an aqueous-based bath of a sensing component, or precursor thereof, under conditions effective to covalently attach the sensing component, or precursor thereof, to the water-swellable ion-permeable matrix material;
wherein the aqueous-based bath comprises water and an organic solvent in an amount effective to solubilize the sensing component, or precursor thereof;(b) contacting the water-swellable ion-permeable matrix material having covalently attached sensing component, or precursor thereof, with an aqueous solution having a pH of at least about 10 and an ionic strength of at least about that of a 5% aqueous sodium chloride solution to form a sensing element; and (c) coveting the sensing element with an opaque overcoat material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of making an ionic sensor comprising:
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(a) reacting acetoxypyrenetris(sulfonyl)chloride with an amine-modified polymeric ion-permeable matrix material to form bound acetoxypyrenesulfonamide;
wherein the acetoxypyrenetris(sulfonyl)chloride is made by a method comprising;(i) converting hydroxypyrenetrisulfonate to acetoxypyrenetrisulfonate; and (ii) reacting acetoxypyrenetrisulfonate with thionyl chloride and a catalytic amount of disubstituted formamide to form acetoxypyrenetris(sulfonyl) chloride; (b) converting the bound acetoxypyrenesulfonamide to the hydroxy form to form a sensing element; and (c) covering the sensing element with an opaque overcoat material. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of making an ionic sensor comprising:
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(a) applying to a surface of a first polymeric ion-permeable matrix material, a second polymeric ion-permeable matrix material having mixed therein an opaque agent; (b) reacting both matrix materials with an epoxide having at least two epoxy groups per molecule to covalently bond the two matrix materials together and form pendant epoxy groups; (c) reacting the epoxy groups with an organic amine having at least two amine groups per molecule to form pendant amine groups; (d) reacting acetoxypyrenetris(sulfonyl)chloride with the pendant amine groups in an aqueous-based bath comprising water, an organic solvent in an amount effective to solubilize the acetoxypyrenetris(sulfonyl)chloride, and buffer salts, to form bound acetoxypyrenesulfonamide;
wherein the acetoxypyrenetris(sulfonyl)chloride is made by a method comprising;(i) converting hydroxypyrenetrisulfonate to acetoxypyrenetrisulfonate; and (ii) reacting acetoxypyrenetrisulfonate with thionyl chloride and a catalytic amount of a disubstituted formamide to form acetoxypyrenetris(sulfonyl) chloride; (e) converting the bound acetoxypyrenesulfonamide to the bound hydroxy form; and (f) capping any unreacted amine groups on the matrix material by contacting them with a solution comprising an acetylating agent, an organic amine, and an ethereal solvent. - View Dependent Claims (17)
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Specification