Coumarin-derivatized fluorescent vic-dioxime-type ligand and its complexes; The preparation, spectroscopy, and electrochemistry
Transition Metal Chemistry, cilt.32, sa.5, ss.642-648, 2007 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 32 Sayı: 5
- Basım Tarihi: 2007
- Doi Numarası: 10.1007/s11243-007-0220-8
- Dergi Adı: Transition Metal Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.642-648
- Kırklareli Üniversitesi Adresli: Evet
Özet
A new vic-dioxime bearing coumarin functionality, N′ 1 , N′ 2 -Dihydroxy-N 1 ,N 2 -bis(4-methyl-2-oxo- 2H-chromen-7-yl)oxalimidamid (LH 2 ), N,N-bis-[4-methylcoumarinyl]- diamino glyoxime (LH 2 ), and its mono- and dinuclear complexes {copper II , cobalt II , nickel II and uranyl II } have been reported. The fluorescence excitation and emission spectra of LH 2 and its complexes with metal ions were examined. It was observed that fluorescence and excitation emission intensity of LH 2 was quenched depending on complex formation with metal ions. The characterizations of all newly synthesized compounds were made by elemental analysis, 1 H-n.m.r, i.r., u.v.-vis., and l.c-m.s./m.s. data. Electrochemical behaviour of the ligand involving oxime and coumarine moieties, and its complexes with Ni II , Cu II , Co II and UO 2 II were investigated by cyclic voltammetry. The comparison of the electrochemical behaviour of the ligand with its complexes enabled us to identify metal-, oxime- and coumarine-based signals. © 2007 Springer.