title: Fluorescent studies of salicylaldehyde and other related carbonyl compounds for the selective and sensitive detection of zinc(II) ions in aqueous solution.
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 K(a) 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.
authors: Chemistry Department, UAE University, Al-Ain, UAE. soleiman.hisaindee@uaeu.ac.ae
authors: Soleiman
authors: S
authors: Hisaindee
authors: Osama
authors: O
authors: Zahid
authors: Mohammed A
authors: MA
authors: Meetani
authors: John
authors: J
authors: Graham
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000577:Amides / Q000737:chemistry; D002264:Carboxylic Acids / Q000737:chemistry; D004952:Esters / Q000737:chemistry; D005453:Fluorescence; D007477:Ions / Q000032:analysis; D007659:Ketones / Q000737:chemistry; D015394:Molecular Structure; D012996:Solutions; D014867:Water / Q000737:chemistry; D015032:Zinc / Q000032:analysis*
chemical_list: D000447:Aldehydes; D000577:Amides; D002264:Carboxylic Acids; D004952:Esters; D007477:Ions; D007659:Ketones; D012996:Solutions; D014867:Water; C013243:salicylaldehyde; D015032:Zinc