| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1304087 | Inorganic Chemistry Communications | 2012 | 4 Pages |
A reversible turn-on sensor (Rh–OH–Rh) which can selectively detect Fe3+ in solution has been developed. The sensor combines two rhodamine moieties with a 3-oxygen Fe3+ receptor to provide excellent selectivity for Fe3+ over a range of biologically relevant metal ions. It binds Fe3+ in a 1:1 stoichiometry with an apparent binding constant 5.2 × 106 M− 1 (log K = 5.28) in ACN/DMF (9/1 v/v) solution. The sensor displays distinct “on–off” changes in color and fluorescence upon the alteration of free Fe3+ levels in solution with a reversible response and little interference with other biological relevant metal ions.
Graphical abstractA reversible turn-on sensor (Rh–OH–Rh) which can selectively detect Fe3+ in solution based on distinct “on–off” changes in color and fluorescence has been developed.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A new Fe3+-selective turn-on optical sensor with a 3-oxygen Fe3+ receptor was designed and synthesized. ► The sensor binds Fe3+ in a 1:1 stoichiometry with an apparent binding constant 5.2 × 106 M–1 in solution. ► The sensor displays distinct "on-off" color and fluorescence changes upon the alteration of free Fe3+ levels in solution. ► The sensor has excellent selectivity for Fe3+, with little interference from other metal ions.
