Membrane selective for metal ions
First Claim
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1. Membrane selective for metal ions comprising an ionophore covalently bonded to the membrane with the general formula:
- ##STR6## in which;
X represents O, S, or SO;
Y represents S or O;
R1, R2, R3, and R4 represent (C1 -C5)alkyl, polyether, an intramolecular or intermolecular (C1 -C1 O)alkyl bridge or polyether bridge;
at least A, B, C, or D is a group with the formula;
space="preserve" listing-type="equation">--(CEF).sub.m --G and the other A, B, C, and D are hydrogen, (C.sub.1 -C.sub.5)alkyl, (C.sub.5 -C.sub.7)aryl, (C.sub.1 -C.sub.5)alkyl(C.sub.5 -C.sub.7)aryl, halogen or (C.sub.5 -C.sub.7)aryl(C.sub.1 -C.sub.5)alkyl, wherein;
m≧
0;
E and F are equal or different and represent hydrogen, (C1 -C5)alkyl, or halogen; and
G is a group for covalent bonding to the membrane;
or A, B, C, and D form a saturated (C5 -C7)cycloalkyl group, which group is substituted by the group --(CEF)m --G, wherein m ≧
0;
or A, B, C, and D form an aromatic (C5 -C7)aryl group which is substituted by the group --(CEF)m --G, wherein m≧
0;
wherein;
E and F are equal or different and represent hydrogen, (C1 -C5)alkyl, or halogen; and
G is a group for covalent bonding to a membrane.
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Abstract
An ionophore according to the general formula I wherein the substituents are chosen such that the ionophore is either also polymerized in the matrix of a membrane selective for metal ions or interwoven therewith. Thus obtained is a membrane having a long useful life for use in diverse sensors such as ISFET, ion-selective electrode, and the like.
14 Citations
9 Claims
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1. Membrane selective for metal ions comprising an ionophore covalently bonded to the membrane with the general formula:
- ##STR6## in which;
X represents O, S, or SO;Y represents S or O; R1, R2, R3, and R4 represent (C1 -C5)alkyl, polyether, an intramolecular or intermolecular (C1 -C1 O)alkyl bridge or polyether bridge; at least A, B, C, or D is a group with the formula;
space="preserve" listing-type="equation">--(CEF).sub.m --G and the other A, B, C, and D are hydrogen, (C.sub.1 -C.sub.5)alkyl, (C.sub.5 -C.sub.7)aryl, (C.sub.1 -C.sub.5)alkyl(C.sub.5 -C.sub.7)aryl, halogen or (C.sub.5 -C.sub.7)aryl(C.sub.1 -C.sub.5)alkyl,wherein; m≧
0;E and F are equal or different and represent hydrogen, (C1 -C5)alkyl, or halogen; and
G is a group for covalent bonding to the membrane;or A, B, C, and D form a saturated (C5 -C7)cycloalkyl group, which group is substituted by the group --(CEF)m --G, wherein m ≧
0;or A, B, C, and D form an aromatic (C5 -C7)aryl group which is substituted by the group --(CEF)m --G, wherein m≧
0;wherein; E and F are equal or different and represent hydrogen, (C1 -C5)alkyl, or halogen; and G is a group for covalent bonding to a membrane. - View Dependent Claims (2, 6, 7)
- ##STR6## in which;
-
3. Membrane selective for metal ions, comprising a polymer membrane and an ionophore included in the polymer membrane with the general formula I, wherein:
-
X represents O, S, or SO; Y represents S or O; R1, R2, R3, and R4 represent (C1 -C5)alkyl, polyether, an intramolecular or intermolecular (C1 -C1 O)alkyl bridge or polyether bridge; at least A, B, C, or D is a group with the formula;
space="preserve" listing-type="equation">--(CEF).sub.m --G and the other A, B, C, and D are hydrogen, (C.sub.1 -C.sub.5)alkyl, (C.sub.5 -C.sub.7)aryl, (C.sub.1 -C.sub.5)alkyl(C.sub.5 -C.sub.7)aryl;
, halogenide or (C.sub.5 -C.sub.7)aryl(C.sub.1 -C.sub.5)alkyl,wherein; m≧
0;E and F are equal or different and represent hydrogen, (C1 -C5)alkyl, or halogen; and G is a group covalently bonded to an oligomer Q; A, B, C, and D form a saturated (C5 -C7)cycloalkyl group which is substituted by the combination --(CEF)m --G--Q, wherein m≧
0;or A, B, C, and D form an aromatic (C5 -C7)aryl group which is substituted by the combination --(CEF)m --G--Q, wherein m≧
0;wherein; E and F are equal or different and represent hydrogen, (C1 -C5)alkyl, or halogen; and G is a group covalently bonded to an oligomer Q. - View Dependent Claims (5, 8, 9)
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4. Membrane as claimed in claim 4, characterized in that G is a group derived from hydroxyl, halogenide, amine, amide, ketone, aldehyde, enamine, epoxide, carboxylic acid ester, acylhalogen, acid anhydride, allylether, acryl, methacryl, alkenyl, alkynyl, sulphide, sulphonic acid, or sulphonic acid ester.
Specification