| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1311214 | Inorganica Chimica Acta | 2010 | 5 Pages |
The reduction potentials for two Wurster’s crowns, aza crown ethers which incorporate the redox active N,N,N′,N′-tetraalkyl-1,4-phenylenediamine into the structure of 18-crown-6, were studied in the presence of the siderophore ferrioxamine B, FeHDFB+. Addition of FeHDFB+ resulted in a positive shift in the host reduction potential for both aza crown ethers studied. This shift is explained in terms of host-guest supramolecular assembly formation, which was independently verified by FAB-MS. An enhanced affinity for host-guest formation of the reduced aza crown ether was calculated for each aza crown ether-siderophore assembly using a thermochemical cycle. These differences in host binding affinity as a function of redox state can be harnessed for use in specific metal ion compartmentalization with application, for example, to environmental remediation.
Graphical abstractThe reduction potentials for two Wurster’s crowns, aza crown ethers which incorporate the redox active N,N,N′,N′-tetraalkyl-1,4-phenylenediamine into the structure of 18-crown-6, were studied in the presence of the siderophore ferrioxamine B, FeHDFB+. Addition of FeHDFB+ resulted in a positive shift in the aza crown reduction potential, which is explained in terms of host-guest supramolecular assembly formation.Figure optionsDownload full-size imageDownload as PowerPoint slide
