Journal
JOURNAL OF FLUORESCENCE
Volume 22, Issue 1, Pages 213-221Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-011-0948-6
Keywords
Azo dyes; Kamlet-Taft; Catalan solvent scales; Chemosensor; Acidic solvents
Funding
- Department of Science and Technology [SR/S1/IC-73/2010]
- University Grants commission [36-21/2008 (SR)]
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A new metal ion-responsive azo-based fluorescent probes have been synthesized and characterized by NMR spectral techniques. Steady-state fluorometric study has been used to analyze the spectroscopic and photophysical characteristics of dye derivatives in various solvents. The fluorescence properties of these dyes are strongly solvent dependent, the wavelength of maximum fluorescence emission shifts to the red. The Kamlet-Taft and Catalan's solvent scales were found to be the most suitable for describing the solvatochromic shifts of the absorption and fluorescence emission. The hydroxy substituted azo dye formed complexes with several metal ions (Co2+, Hg2+, Ni2+ and Cu2+) and fluorescence quenching with metal ions reveal that it can be used as a new fluorescence sensor to detect the Cu2+ ion.
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