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Journal of Taibah University for Science Volume 13, 2019 - Issue 1
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Research Articles

Synthesis, spectroscopic characterization and DNA binding studies of Cu(II) complex of Schiff base containing benzothiazole moiety

Madhuri ChaurasiaDepartment of Chemistry, Zakir Husain Delhi College, University of Delhi, New Delhi, IndiaORCID Iconhttps://orcid.org/0000-0001-7499-0623View further author information
ORCID Icon,
Deepak TomarDepartment of Chemistry, Dyal Singh College, University of Delhi, New Delhi, IndiaORCID Iconhttps://orcid.org/0000-0001-7633-5657View further author information
ORCID Icon &
Sulekh ChandraDepartment of Chemistry, Zakir Husain Delhi College, University of Delhi, New Delhi, IndiaCorrespondence[email protected]
[email protected]
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Pages 1050-1059 | Received 29 May 2018, Accepted 07 Oct 2019, Published online: 25 Oct 2019

Figures & data

Scheme 1. Synthesis of Schiff base ligand L.

Scheme 1. Synthesis of Schiff base ligand L.

Figure 1. Mass spectrum of ligand L.

Figure 1. Mass spectrum of ligand L.

Figure 2. Mass spectrum of copper(II) complex of ligand, [CuL2(OAc)2].

Figure 2. Mass spectrum of copper(II) complex of ligand, [CuL2(OAc)2].

Figure 3. 1H NMR spectrum of ligand L.

Figure 3. 1H NMR spectrum of ligand L.

Figure 4. 13C NMR spectrum of ligand L.

Figure 4. 13C NMR spectrum of ligand L.

Figure 5. IR spectrum of ligand L. Inset, zoom IR spectrum of ML2.

Figure 5. IR spectrum of ligand L. Inset, zoom IR spectrum of ML2.

Figure 6. Electronic spectra of Cu(II) complex of Schiff base ligand L showing wide absorption upto 1100 nm.

Figure 6. Electronic spectra of Cu(II) complex of Schiff base ligand L showing wide absorption upto 1100 nm.

Figure 7. EPR spectrum of Cu(II) complex of Schiff Base ligand.

Figure 7. EPR spectrum of Cu(II) complex of Schiff Base ligand.

Figure 8. The proposed structure of Cu(II) complex [CuL2(OAc)2].

Figure 8. The proposed structure of Cu(II) complex [CuL2(OAc)2].

Figure 9. The absorbance spectra of Cu(II) complex (1 × 10−5 M) and increasing the concentration of CT-DNA from zero to 120 µM in presence of 20 mM Tris- HCl buffer containing 100 mM NaCl, pH 7.4.

Figure 9. The absorbance spectra of Cu(II) complex (1 × 10−5 M) and increasing the concentration of CT-DNA from zero to 120 µM in presence of 20 mM Tris- HCl buffer containing 100 mM NaCl, pH 7.4.

Figure 10. The fluorescence spectra of ligand L and Cu(II) complex ML2 (1 × 10−5 M) and increasing the concentration of CT-DNA from zero to 100 µM in presence of 20 mM Tris- HCl buffer containing 100 mM NaCl, pH 7.4, λex = 270 nm.

Figure 10. The fluorescence spectra of ligand L and Cu(II) complex ML2 (1 × 10−5 M) and increasing the concentration of CT-DNA from zero to 100 µM in presence of 20 mM Tris- HCl buffer containing 100 mM NaCl, pH 7.4, λex = 270 nm.

Figure 11. The plot of log (F0-F) /F versus log [CT-DNA].

Figure 11. The plot of log (F0-F) /F versus log [CT-DNA].

Figure 12. Stern-Volmer plot for quenching of ML2 by CT-DNA.

Figure 12. Stern-Volmer plot for quenching of ML2 by CT-DNA.

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