Carbonate ionophore with improved selectivity
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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Nov 21, 2000
filing date -
Nov 21, 2000
priority date (Note) -
Expired
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Abstract
The invention pertains to a novel ionophore having the general structure: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently straight or branched chain alkyl having 4 to 12 carbon atoms or the alkyl groups may optionally contain a cycloalkyl group having 3 to 8 carbon atoms or R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4 together with N to which they are attached, can form a ring having 5 to 8 carbon atoms. This ionophore has increased selectivity for carbonate ions over other ions, especially salicylate. The invention includes membranes containing effective amounts of the novel ionophores and -sensors containing these membranes.
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