H. R. Darabi, M. Kargar, Roghayeh Hajipoor
Jan 20, 2016
Citations
0
Influential Citations
8
Citations
Journal
Tetrahedron Letters
Abstract
The fluorophore 2,6-bis(2-methoxyphenyl)dithiazolo[4,5- b :5′,4′- e ]pyridine) 3 , with a planar structure, was synthesized using a one-pot Willgerodt–Kindler reaction which is potentially applicable to various dithiazolopyridines. The basic photophysical characteristics were investigated in organic solvents of different polarity. Chemosensor 3 exhibits a ‘turn-off’ response toward Cu 2+ and Fe 3+ ions, as well as a new emission wavelength-ratiometric response to H + ions, illustrating a different recognition manner. From the binding constant calculations of 3 with Cu 2+ , increased sensitivity for the fluorescence method over that of the UV–vis method was found, while both methods showed similar sensitivity for binding of 3 with H + . On the other hand, the different behavior in the complexes of 3 ·H + and 3 ·Cu 2+ under cyclic voltammetric analysis was observed. These findings suggest that compound 3 may have potential as a sensor for water pollution by Cu 2+ and Fe 3+ ions as well as protons.