Synthesis of a new ONNO donor tetradentate schiff base ligand and binuclear Cu(II) complex: Quantum chemical, spectroscopic and photoluminescence investigations

Sarıoğlu, Ahmet Oral; Ceylan, Ümit; Yalçın, Şerife Pınar; Sönmez, Mehmet; Ceyhan, Gökhan; Aygün, Muhıttın

doi:10.1016/j.jlumin.2016.03.021

Cited by 22 publications

(4 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bond length of C-N (1.337 (2) Å) has been observed as shorter than the standard C-N single bond length (1.48 Å) but it is slightly longer than standard double bond length (1.28Å) 44 and C-O bond length observed in the range of 1.360(3)-1.423(3) Å for L1.…”

Section: Crystal Structurementioning

confidence: 67%

Synthesis of Fe and Cu metal complexes derived from ‘SNS’ Pincer type ligands and their efficient catalyst precursors for the chemical fixation of $$\hbox {CO}_{2}$$ CO 2

et al. 2019

Self Cite

View full text Add to dashboard Cite

Two novel tridentate SNS pincer type ligands, 2,6-bis[[(2-methoxyphenyl)thio]methyl]pyridine (L1) and 2,6-bis[[(2-chlorophenyl)thio]methyl]pyridine (L2), each possessing two sulfur and one nitrogen donor functionalities (SNS), based on 2,6-bis(thioether)pyridine ligands were prepared and metallised with CuCl 2 • 2H 2 O and FeCl 2 • 4H 2 O metal salts. Two new unanticipated complexes were obtained from the L2 ligand, the dimeric bidentate Cu(I) complex [Cu 2 (κ 2 −L2) 2 Cl 2 ] and tridentate Fe(II) complex [Fe(κ 3 −L2)Cl 2 ] while two new tridentate pincer-type complexes M(κ 3-L1)Cl 2 ] (M = Cu, Fe) were formed from the L1 ligand. It was observed that the structure of this Cu(I) complex has a tetrahedral geometry using single crystal Xray diffraction analysis. In addition, catalytic properties of metal complexes towards the formation of cyclic carbonates from CO 2 and epoxides were investigated. The less sterically hindered Fe(II) complex with the L1 ligand [Fe(κ 3 −L1)Cl 2 ] (2) showed the best catalytic activity. Several parameters including temperature, time, epoxide identity and CO 2 pressure were investigated to find the optimum catalytic reaction conditions. Moreover, DFT studies of these compounds are presented in the study.

show abstract

Section: Crystal Structurementioning

confidence: 67%

Synthesis of Fe and Cu metal complexes derived from ‘SNS’ Pincer type ligands and their efficient catalyst precursors for the chemical fixation of $$\hbox {CO}_{2}$$ CO 2

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…When the FT‐IR spectra of the free ligands were examined, it was observed that the azomethine stretch band (C=N) was 1617 cm −1 for the ligand (H 2 L) and 1584 cm −1 for the phen, respectively [37,45] . The IR spectra of Ni(II), Cu(II), and Pd(II) complexes showed a strong sharp band evident in the range 1577–1583 and 1608–1610 cm −1 , [46] which was attributed to stretching of azomethine (C=N) and phenanthroline (C=N) in the ligands. However, this peak in the complexes shifted to the lower (1–9 cm −1 ) wavenumbers, indicating the participation of azomethine nitrogen in coordination with the metal ion [47–49] .…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, Photoluminescence Properties and Antiproliferative Activity of New Pd(II), Ni(II) and Cu(II) Mixed Complexes Bearing Schiff Base Ligand and 1,10‐phenanthroline

et al. 2023

Self Cite

View full text Add to dashboard Cite

In this study, new mixed ligand Cu(II), Ni(II) and Pd(II) metal complexes were synthesized and characterized by NMR (for ligand), UV‐Vis, elemental analysis, FT‐IR, molar conductivity techniques. While the octahedral structure is recommended for Cu(II) and Ni(II) complexes, the square plane structure is recommended for the Pd(II) complex. The compounds lack conductivity traits indicating their non‐electrolyte nature in solution. Photoluminescence properties of the synthesized mixed ligand complexes were investigated. These three complexes showed emission bands when excited at their maximum absorbances. The excitation/emission bands of the Pd(II) complex shifted to higher (red) wavelengths when compared to the Cu(II) and Ni(II) complexes. The Pd(II) complex showed the Stokes shift of 26 nm. These metal complexes were screened for their anticancer activities against the colon cancer (DLD‐1) and lung cancer (A549) cell lines. The results show that these complexes have antiproliferative activity. In particular, two of the complexes (Pd(II) and Cu(II)) were found to have a higher cytotoxic effect than the positive control drug cisplatin with low IC50 values.

show abstract

“…Open Sci. 8: 210910 chemical compound is directly associated with the difference of E HOMO and E LUMO [51]. The ability to accept electron is the feature of LUMO orbital which is electronically empty or unoccupied orbital while the ability to donate electron is the feature of HOMO orbital which is filled with electrons.…”

Section: Frontier Molecular Orbital Analysismentioning

confidence: 99%

Metal incorporated aminothiazole-derived compounds: synthesis, density function theory analysis,in vitroantibacterial and antioxidant evaluation

et al. 2021

View full text Add to dashboard Cite

The present study advocates the combined experimental and computational study of metal-based aminothiazole-derived Schiff base ligands. The structure and electronic properties of ligands have been experimentally studied by spectroscopic methods (UV-Vis, FT-IR, 1 H-NMR and 13 C-NMR), mass spectrometry, elemental analysis and theoretically by density function theory (DFT). Computational calculations employing the B3LYP/6-31 + G(d,p) functional of DFT were executed to explore the optimized geometrical structures of ligands along with geometric parameters, molecular electrostatic potential (MEP) surfaces and frontier molecular orbital (FMO) energies. Global reactivity parameters estimated from FMO energy gaps signified the bioactive nature of ligands. The synthesized ligands were used for chelation with 3 d -transition metals [VO(IV), Cr(III), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II)] in 1 : 2 (metal : ligand) molar ratio. The spectral and magnetic results confirmed the formation of octahedral geometry around all the divalent and trivalent metal centres, whereas the tetravalent vanadyl centres were confirmed to have square-pyramidal geometry. All the as-synthesized compounds were investigated for in vitro antibacterial potential against two Gram-negative ( Salmonella typhimurium and Escherichia coli ) and two Gram-positive ( Bacillus subtilis and Staphylococcus aureus ) bacteria. Antibacterial assay results displayed pronounced activity, and their activity is comparable to that of a standard drug (streptomycin). The antioxidant potential of these compounds was assessed by employing diphenyl picryl hydrazide radical scavenging activity. The results displayed that all the metal chelates have exhibited more bioactivity in contrast with free ligands. The chelation was the main reason for their enhanced bioactivity. These results indicated that the thiazole metal-based compounds could be exploited as antioxidant and antimicrobial candidates.

show abstract

Synthesis of a new ONNO donor tetradentate schiff base ligand and binuclear Cu(II) complex: Quantum chemical, spectroscopic and photoluminescence investigations

Cited by 22 publications

References 67 publications

Synthesis of Fe and Cu metal complexes derived from ‘SNS’ Pincer type ligands and their efficient catalyst precursors for the chemical fixation of $$\hbox {CO}_{2}$$ CO 2

Synthesis of Fe and Cu metal complexes derived from ‘SNS’ Pincer type ligands and their efficient catalyst precursors for the chemical fixation of $$\hbox {CO}_{2}$$ CO 2

Synthesis, Characterization, Photoluminescence Properties and Antiproliferative Activity of New Pd(II), Ni(II) and Cu(II) Mixed Complexes Bearing Schiff Base Ligand and 1,10‐phenanthroline

Metal incorporated aminothiazole-derived compounds: synthesis, density function theory analysis,in vitroantibacterial and antioxidant evaluation

Contact Info

Product

Resources

About