Spectrophotometric determination of Cu<SUP>2+</SUP> with quinolinyl derivative in organic and aqueous solutions
Makaleler > Tam Makale · 2007
Yazarlar: Nesibe Avcibasi, Yevgen Posokhov, Kasim Ocakoglu, Canan Varlikli, Mahmut Kus, Gülşah TÜRKMEN, Mustafa Kemal Gumus, Fatma Tolay Tugcu, Ercan Aydemir, Seniz Kaban
ASIAN JOURNAL OF CHEMISTRY, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2007, cilt 19, ss 1930-1942
Özet
A spectrophotometric study of complex formation of 4-chloro-2-{[(1E)-quinolin-2-ylmethylene)]amino} phenol (4-Cl-2-QMAP)with copper (II) in aprotic acetonitrile and in protic ethanol and n-butanol has been carried out. The stability constants and stoichiometry of the complexes have been estimated. The stability constant of copper (II)-ligand complex formation grows with growth of solvent polarity/polarizability and is the greatest in polar aprotic acetonitrile, whereas spectral characteristics of the metal-ligand complex (long-wave length shift of absorbance maximum, extinction coefficient) grow in H-bond donating solvents-in protic ethanol and n-butanol. 4-Cl-2-QMAP on dioctyl phthalate plasticized PVC film has shown efficient selectivity and sensitivity towards Cu2+ in aqueous solution. ortho-Hydroxyphenol quinolinyl derivative on PVC film is found to have higher photostability with respect to same quinolinyl in water and methanol solutions. Embedding of 4-Cl-2-QMAP on PVC is shown to be useful for the spectroscopic determination of Cu2+ trace amounts (< 10(-4) M) in aqueous solutions.