Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1233310 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2011 | 5 Pages |
A novel fluoroionophore 1 based on 3,4-dimethylthieno[2,3-b]thiophene bearing two monoaza-15-crown-5 ethers at 3- and 4-positions was prepared. UV–vis and fluorescence responses of compound 1 upon the addition of alkali and alkaline earth metal cations were evaluated in acetonitrile solution. Receptor 1 showed unique response for Ba2+ due to the formation of an intramolecular sandwich complex.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We reported that a novel fluorescent chemosensor 1 of 3,4-dimethylthieno[2,3-b]-thiophene bearing two aza-15-crown-5 moieties at 3- and 4-positions. ► Fluorescent chemosensor 1 displays a strong fluorescence enhancement upon interaction with Ba2+. ► This selective enhancement of 1 is ascribed to the formation of the intramolecular sandwich complex.