Cation-sensing composite structure and compounds for use therein
First Claim
Patent Images
1. A fluorescent ionophoric compound, comprising:
- a complexing moiety for selective binding of an ion; and
a fluorescing moiety that contains close-lying nπ
* and π
π
* excited states, wherein the compound has a wavelength of maximum absorbance of at least about 350 nm;
wherein the ionophoric compound has the general formula;
##STR104## wherein;
T is O or N, with the proviso that when T is O, q is 0 and n is 0 to 2, and whenT is N, q is 1 and m and n are independently 0 or 1;
each R2 independently is selected from the group consisting of;
hydrogen, halogen, a C1 -C10 alkyl, a C1 -C10 alkoxy, a C2 -C10 alkenyl, a C1 -C10 alkylamino, a C1 -C10 dialkylamino, and a group having the formula (CH2 X)a E in which X is O, NH, or a single bond, E is a tonal group that includes active hydrogen, and a is a whole number from 1 to 10;
R3 is selected from the group consisting of;
hydrogen, a C1 -C10 aryl, a C5 -C8 cycloalkyl, a C6 -C10 aryl, a heterocyclic group comprising at least one O, N, or S atom, a C2 -C10 alkenyl, and a group having the formula (CH2 X)b E in which X and E are defined above and b is a whole number from 0 to 10;
R1 is a substituted heterocyclic or aromatic moiety andZ is O or NR5, where R5 is hydrogen or a hydrocarbyl-containing group.
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Abstract
A fluorescent ionophoric compound is disclosed that includes a complexing moiety, such as a cryptand or crown-ether portion, and a fluorescing moiety such as a coumarin portion. The coumarin portion may be substituted at the 3-position with an electron withdrawing or polarizable group such as a substituted aromatic group or a substituted heterocyclic group having a heteroatom in at least one of its alpha positions. The compound, which exhibits good photostability, can be incorporated into cation-sensing composite structures by means of convenient points of covalent attachment.
82 Citations
29 Claims
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1. A fluorescent ionophoric compound, comprising:
-
a complexing moiety for selective binding of an ion; and a fluorescing moiety that contains close-lying nπ
* and π
π
* excited states, wherein the compound has a wavelength of maximum absorbance of at least about 350 nm;wherein the ionophoric compound has the general formula;
##STR104## wherein;
T is O or N, with the proviso that when T is O, q is 0 and n is 0 to 2, and whenT is N, q is 1 and m and n are independently 0 or 1; each R2 independently is selected from the group consisting of;
hydrogen, halogen, a C1 -C10 alkyl, a C1 -C10 alkoxy, a C2 -C10 alkenyl, a C1 -C10 alkylamino, a C1 -C10 dialkylamino, and a group having the formula (CH2 X)a E in which X is O, NH, or a single bond, E is a tonal group that includes active hydrogen, and a is a whole number from 1 to 10;R3 is selected from the group consisting of;
hydrogen, a C1 -C10 aryl, a C5 -C8 cycloalkyl, a C6 -C10 aryl, a heterocyclic group comprising at least one O, N, or S atom, a C2 -C10 alkenyl, and a group having the formula (CH2 X)b E in which X and E are defined above and b is a whole number from 0 to 10;R1 is a substituted heterocyclic or aromatic moiety and Z is O or NR5, where R5 is hydrogen or a hydrocarbyl-containing group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A fluorescent ionophoric compound having the general formula:
- ##STR107## wherein m and n are independently 0 or 1;
Z is O or NH; Y and Y'"'"' independently are O, S, NHx, or CHy where x is 0 or 1 and y is 1 or 2, with the proviso that at least one of Y and Y'"'"' must be O, S, or NHx, each R2 independently is a sterically non-interferring group; R3 is a non-electron withdrawing group; and each R4 group is independently hydrogen, halogen, a hydrocarbyl-containing group, a hetero-acyclic group, a heterocyclic group, or a group having the formula (CH2 X)c E in which X is O, NH, or a single bond, E is a functional group that includes active hydrogen, and c is a whole number from 0 to 100, or both R4 groups together with the carbon atoms to which they are attached form a 5- or 6-membered ring which optionally can have one or more further R4 groups attached, wherein the compound has a wavelength of maximum absorbance of at least about 380 nm a wavelength of maximum emission of no more than about 500 nm. - View Dependent Claims (28)
- ##STR107## wherein m and n are independently 0 or 1;
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29. A fluorescent ionophoric compound, comprising
a complexing moiety for selective binding of an ion; - and
a fluorescing moiety that contains close-lying nπ
* and π
π
* excited states,wherein the compound has a wavelength of maximum absorbance of at lest about 350 nm, the ionophoric compound having the formula;
##STR108## wherein Y is O, S, NH.
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Specification