Abstract
Salicylaldehyde was found to have a high selectivity for zinc ions with simultaneous enhancement of fluorescence in aqueous buffer solution at optimum pH 8.5. The stoichiometry of the complex was determined to be 1:1 with a Ka value of 3.4×10 4 M -1 at 298 K. The fluorescence of the complex is not affected by common anions and Zn 2+ binds preferentially to salicylaldehyde in the presence of alkali, alkaline earth and heavy metal cations (Hg 2+, Cd 2+, Cr 3+ and Ni 2+). This property is not observed with related phenolic compounds bearing a carbonyl group such as esters, amides, carboxylic acids and ketones.
| Original language | English |
|---|---|
| Pages (from-to) | 677-683 |
| Number of pages | 7 |
| Journal | Journal of Fluorescence |
| Volume | 22 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Mar 2012 |
Keywords
- Fluorescence
- Metal ions
- Salicylaldehyde
- Selectivity
- Zinc
ASJC Scopus subject areas
- Biochemistry
- Clinical Psychology
- Social Sciences (miscellaneous)
- Sociology and Political Science
- Spectroscopy
- Clinical Biochemistry
- Law
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