| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 176904 | Dyes and Pigments | 2013 | 9 Pages |
Novel azadithiacrown ether containing bis(styryl)pyridinium dyes were synthesized and their complexation with different transition metal cations was investigated. It was found that the compounds give a selective ratiometric optical response in the presence of silver (I) and mercury (II) cations. Evidence was given for the occurrence of two stoichiometries: LM and LM2. Moreover, the formation of a mixed complex [Ag+·L·Hg2+] containing both Ag+ and Hg2+ cations simultaneously was demonstrated. Optical spectroscopy was used to estimate stability constant values of the complexes, NMR spectroscopy data allowed us to offer a model of spatial arrangement of the obtained species.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Novel bis(styryl)pyridinium dyes containing two azadithiacrown receptors were synthesized. ► Complexation with transition metal ions were investigated by optical and NMR spectroscopy. ► Evidence was given for the occurrence of mono- and bimetallic complexes. ► The formation of a mixed heterometallic complex with both Ag+ and Hg2+ ions was studied. ► Being absorbed onto the solid surface the dyes retain their cation binding properties.
