title: A novel Schiff-base as a Cu(II) ion fluorescent sensor in aqueous solution.
abstract: A new fluorescent Cu(II) sensor (L) obtained from the Schiff base of 5,5'-methylene-bis-salicylaldehyde with amidol (2,4-diaminophenol) was synthesized and characterized by FT-IR, MS, (1)H NMR, (13)C NMR techniques. In the presence of pH 6.5 (KHPO4-Na2HPO4) buffer solutions, copper reacted with L to form a stable 2:1 complex. Fluorescence spectroscopic study showed that Schiff base is highly sensitive towards Cu(II) over other metal ions (K(+), Na(+), Al(3+), Ni(2+), Co(2+), Fe(3+), Zn(2+), Pb(2+)) in DMSO/H2O (30%, v/v). The sensor L was successfully applied to the determination of copper in standard reference material. The structural properties and molecular orbitals of the complex formed between L and Cu(2+) ions were also investigated using quantum chemical computations.
authors.affiliation: Chemistry Department, Faculty of Arts and Sciences, Marmara University, Turkey.
authors.forename: Z Yurtman
authors.initials: ZY
authors.lastname: Gündüz
authors.affiliation: Chemistry Department, Faculty of Arts and Sciences, Marmara University, Turkey.
authors.forename: C
authors.initials: C
authors.lastname: Gündüz
authors.affiliation: Çanakkale Onsekiz Mart University, Biga Vocational School, Department of Chemistry Technology, Biga 17200, Çanakale, Turkey.
authors.forename: C
authors.initials: C
authors.lastname: Özpınar
authors.affiliation: Chemistry Department, Faculty of Arts and Sciences, Marmara University, Turkey. Electronic address: oaydinurucu@gmail.com.
authors.forename: O Aydın
authors.initials: OA
authors.lastname: Urucu
keywords: Chemosensor; Copper (II); Fluorescence; Schiff-base