AI Article Synopsis
- - A study examined ten ionophores that selectively bind silver ions (Ag+) in solvent polymeric membranes, focusing on their selectivity and ability to form complexes.
- - Ionophores with thioether or thiocarbamate groups showed significantly stronger interactions compared to those with pi-coordination.
- - The most effective ionophores maintained remarkably low detection limits for Ag+ ions (down to 3 x 10^-11 M for potentiometric and 2 x 10^-11 M for optical detection) for at least a month, particularly using bridged thiacalixarenes in fluorescent microspheres.
Article Abstract
Ten Ag+-selective ionophores have been characterized in terms of their potentiometric selectivities and complex formation constants in solvent polymeric membranes. The compounds with pi-coordination show much weaker interactions than those with thioether or thiocarbamate groups as the coordinating sites. Long-term studies with the best ionophores show that the lower detection limit of the best Ag+ sensors can be maintained in the subnanomolar range for at least 1 month. The best ionophores have also been characterized in fluorescent microspheres. The so far best lower detection limits of 3 x 10(-11) M (potentiometrically) and 2 x 10(-11) M Ag+ (optically) are found with bridged thiacalixarenes.
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2883728 | PMC |
| http://dx.doi.org/10.1016/j.aca.2006.05.009 | DOI Listing |
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