Fluorescent vic-dioxime-type ligand and its mono- and dinuclear complexes: The preparation, spectroscopy, and electrochemistry of its various complexes

Metin Özer; Mehmet Kandaz; Ali Riza Özkaya; Mustafa Bulut; Orhan Güney

doi:10.1016/j.dyepig.2006.08.034

Fluorescent vic-dioxime-type ligand and its mono- and dinuclear complexes: The preparation, spectroscopy, and electrochemistry of its various complexes

Metin Özer, Mehmet Kandaz^*, Ali Riza Özkaya, Mustafa Bulut, Orhan Güney

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

A new coumarin functionalized vic-dioxime, S,S-bis-[4-methylcoumarinyl]-dithioglyoxime (LH₂), and its soluble mono- and dinuclear complexes {nickel(II), copper(II), cobalt(II), and uranyl(II)} have been reported. The fluorescent properties of the ligand and its complexes are due to the 7-mercapto-4-methylcoumarin fluorophore, which is conjugated with vic-dioxime that functions as the MN₄ core. Fluorescence spectra of the probe showed a clear shift in excitation wavelength maxima upon metal binding indicating its potential use as ratiometric metal indicator. The fluorescence of complexes was found to be highly sensitive to both polarity and protic character of the solvent used. Both mononuclear (LH)₂M (M = Ni, Cu and Co) and homodinuclear (LH)₂(UO₂)₂(OH)₂) complexes have been obtained with the metal:ligand ratios of 1:2 and 2:2, respectively. The characterizations of all newly synthesized compounds were made by elemental analysis, ¹H NMR, FT-IR, UV-vis, and mass (LSI-MS) data. The electrochemical investigation of the Ni(II), Cu(II), Co(II) and UO₂(II) complexes in comparison with the ligand involving oxime and coumarin moieties enabled us to identify metal-, oxime- and coumarin-based signals.

Original language	English
Pages (from-to)	125-132
Number of pages	8
Journal	Dyes and Pigments
Volume	76
Issue number	1
DOIs	https://doi.org/10.1016/j.dyepig.2006.08.034
Publication status	Published - 2008

Funding

We thank the Research Fund of DPT (Project No: 2003K120970 and 2003K120810) and Scientific and Technical Research Council of Turkey (TUBITAK) [TBAG-AY/400 (105T002)] for financial support.

Funders	Funder number
DPT	2003K120970, 2003K120810
TUBITAK	TBAG-AY/400, 105T002
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

Keywords

Cobalt
Copper
Coumarin
Cyclic voltammetry
Fluorescence
Nickel
Uranyl
Vic-dioxime complexes

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10.1016/j.dyepig.2006.08.034

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title = "Fluorescent vic-dioxime-type ligand and its mono- and dinuclear complexes: The preparation, spectroscopy, and electrochemistry of its various complexes",

abstract = "A new coumarin functionalized vic-dioxime, S,S-bis-[4-methylcoumarinyl]-dithioglyoxime (LH2), and its soluble mono- and dinuclear complexes {nickel(II), copper(II), cobalt(II), and uranyl(II)} have been reported. The fluorescent properties of the ligand and its complexes are due to the 7-mercapto-4-methylcoumarin fluorophore, which is conjugated with vic-dioxime that functions as the MN4 core. Fluorescence spectra of the probe showed a clear shift in excitation wavelength maxima upon metal binding indicating its potential use as ratiometric metal indicator. The fluorescence of complexes was found to be highly sensitive to both polarity and protic character of the solvent used. Both mononuclear (LH)2M (M = Ni, Cu and Co) and homodinuclear (LH)2(UO2)2(OH)2) complexes have been obtained with the metal:ligand ratios of 1:2 and 2:2, respectively. The characterizations of all newly synthesized compounds were made by elemental analysis, 1H NMR, FT-IR, UV-vis, and mass (LSI-MS) data. The electrochemical investigation of the Ni(II), Cu(II), Co(II) and UO2(II) complexes in comparison with the ligand involving oxime and coumarin moieties enabled us to identify metal-, oxime- and coumarin-based signals.",

keywords = "Cobalt, Copper, Coumarin, Cyclic voltammetry, Fluorescence, Nickel, Uranyl, Vic-dioxime complexes",

author = "Metin {\"O}zer and Mehmet Kandaz and {Riza {\"O}zkaya}, Ali and Mustafa Bulut and Orhan G{\"u}ney",

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T1 - Fluorescent vic-dioxime-type ligand and its mono- and dinuclear complexes

T2 - The preparation, spectroscopy, and electrochemistry of its various complexes

AU - Özer, Metin

AU - Kandaz, Mehmet

AU - Riza Özkaya, Ali

AU - Bulut, Mustafa

AU - Güney, Orhan

PY - 2008

Y1 - 2008

N2 - A new coumarin functionalized vic-dioxime, S,S-bis-[4-methylcoumarinyl]-dithioglyoxime (LH2), and its soluble mono- and dinuclear complexes {nickel(II), copper(II), cobalt(II), and uranyl(II)} have been reported. The fluorescent properties of the ligand and its complexes are due to the 7-mercapto-4-methylcoumarin fluorophore, which is conjugated with vic-dioxime that functions as the MN4 core. Fluorescence spectra of the probe showed a clear shift in excitation wavelength maxima upon metal binding indicating its potential use as ratiometric metal indicator. The fluorescence of complexes was found to be highly sensitive to both polarity and protic character of the solvent used. Both mononuclear (LH)2M (M = Ni, Cu and Co) and homodinuclear (LH)2(UO2)2(OH)2) complexes have been obtained with the metal:ligand ratios of 1:2 and 2:2, respectively. The characterizations of all newly synthesized compounds were made by elemental analysis, 1H NMR, FT-IR, UV-vis, and mass (LSI-MS) data. The electrochemical investigation of the Ni(II), Cu(II), Co(II) and UO2(II) complexes in comparison with the ligand involving oxime and coumarin moieties enabled us to identify metal-, oxime- and coumarin-based signals.

AB - A new coumarin functionalized vic-dioxime, S,S-bis-[4-methylcoumarinyl]-dithioglyoxime (LH2), and its soluble mono- and dinuclear complexes {nickel(II), copper(II), cobalt(II), and uranyl(II)} have been reported. The fluorescent properties of the ligand and its complexes are due to the 7-mercapto-4-methylcoumarin fluorophore, which is conjugated with vic-dioxime that functions as the MN4 core. Fluorescence spectra of the probe showed a clear shift in excitation wavelength maxima upon metal binding indicating its potential use as ratiometric metal indicator. The fluorescence of complexes was found to be highly sensitive to both polarity and protic character of the solvent used. Both mononuclear (LH)2M (M = Ni, Cu and Co) and homodinuclear (LH)2(UO2)2(OH)2) complexes have been obtained with the metal:ligand ratios of 1:2 and 2:2, respectively. The characterizations of all newly synthesized compounds were made by elemental analysis, 1H NMR, FT-IR, UV-vis, and mass (LSI-MS) data. The electrochemical investigation of the Ni(II), Cu(II), Co(II) and UO2(II) complexes in comparison with the ligand involving oxime and coumarin moieties enabled us to identify metal-, oxime- and coumarin-based signals.

KW - Cobalt

KW - Copper

KW - Coumarin

KW - Cyclic voltammetry

KW - Fluorescence

KW - Nickel

KW - Uranyl

KW - Vic-dioxime complexes

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M3 - Article

AN - SCOPUS:34447134338

SN - 0143-7208

VL - 76

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JO - Dyes and Pigments

JF - Dyes and Pigments

IS - 1

ER -

Fluorescent vic-dioxime-type ligand and its mono- and dinuclear complexes: The preparation, spectroscopy, and electrochemistry of its various complexes

Abstract

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Keywords

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