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US 5,474,743 AGranted
Cation-sensing composite structure and compounds for use therein
AssigneeMinnesota Mining and Manufacturing Company
InventorsJohn E. Trend, Cary A. Kipke, Mitchell A. Rossman, Masao Yafuso, Sanjay L. Patil
Life of this patent
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Abstract
A fluorescent ionophoric compound comprises a cryptand portion and a coumarin portion substituted at the 3-position with an electron withdrawing or polarizable group. The compound, which exhibits good photostability, can be incorporated into cation-sensing composite structures useful in biological and environmental testing, which can be used with conventional glass optics, by means of convenient points of covalent attachment.
Claims25
A fluorescent ionophoric compound having the general formula ##STR7## wherein m and n are independently 0 or 1,
- R is at least one of an electron withdrawing group and a polarizable group, and
- Z is oxygen or N--R" where R" is H or a C.sub.1 to C.sub.4 alkyl group,
- said compound having an absorbance maximum in the range of 350 to 440 nm.
Dependencies are inferred from the claim text.