Abstract
Fluorescence enhancement of 8-hydroxyquinoline-5-sulfonic acid complexes of Mg, Ca, Sr, Ba, Al, Zn and Cd were studied in micellar and hydroorganic solvents. Al is extraordinarily amenable to both types of fluorescence enhancement, an order of magnitude to two order of magnitude enhancement of fluorescence intensity has been observed with aqueous hexadecyltrimethylammonium chloride (HTAC) and certain mixed aqueous-organic solvents. Fe(III) appears to be an unusually powerful fluorescence quencher in these systems — the effect is noticeable in low micromolar concentrations and is greatly amplified by cationic surfactants such as HTAC.
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Phillips, D.A., Soroka, K., Vithanage, R.S. et al. Enhancement and quenching of fluorescence of metal chelates of 8-hydroxyquinoline-5-sulfonic acid. Mikrochim Acta 88, 207–220 (1986). https://doi.org/10.1007/BF01196613
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DOI: https://doi.org/10.1007/BF01196613