Transition metal complexes with binucleating ligands

Casellato, U.; Vigato, P.A.; Vidali, M.

doi:10.1016/s0010-8545(00)80330-6

Cited by 199 publications

(49 citation statements)

References 157 publications

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“…Schiff base ligands are able to easily attach metal ions and to stabilize them in order to create highly stable coordination compounds [45][46][47][48][49][50]. Due to the biological essential activity of copper, its coordination chemistry has received significant attention.…”

Section: Morphology and Characterization Of Immobilized Materialsmentioning

confidence: 99%

Highly ordered Nanomaterial Functionalized Copper Schiff Base Framework: Synthesis, Characterization, and Hydrogen Peroxide Decomposition Performance

2017

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An immobilized copper Schiff base tridentate complex was prepared in three steps from SBA-15 supports. The immobilized copper nanocatalyst (heterogeneous catalyst) was characterized by Fourier transform infrared spectroscopy (FT-IR), cross polarization magic angle spinning (CP-MAS), 13-carbon nuclear magnetic resonance ( 13 C-NMR), atomic absorption spectroscopy (AAS), thermogravimetric analysis (TGA), and N 2 -physisorption. Moreover, morphological and structural features of the immobilized nanocatalyst were analyzed using transmission electron microscopy (TEM) and X-ray powder diffraction spectrometry (PXRD). After characterizing the nanocatalyst, the catalytic activity was determined in hydrogen peroxide (H 2 O 2 ) decomposition. The high decomposition yield of H 2 O 2 was obtained for low-loaded copper content materials at pH 7 and at room temperature. Furthermore, the nanocatalyst exhibited high activity and stability under the investigated conditions, and could be recovered and reused for at least five consecutive times without any significant loss in activity. No copper leaching was detected during the reaction by AAS measurements.

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Section: Morphology and Characterization Of Immobilized Materialsmentioning

confidence: 99%

Highly ordered Nanomaterial Functionalized Copper Schiff Base Framework: Synthesis, Characterization, and Hydrogen Peroxide Decomposition Performance

2017

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“…For hydrogenbond motifs, see: Bernstein et al (1995). For information on Schiff base ligands, their complexes and applications, see, for example ; ;Fun & Kia (2008a,b); Calligaris & Randaccio (1987); Casellato & Vigato (1977).…”

Section: Related Literaturementioning

confidence: 99%

“…The condensation of primary amines with carbonyl compounds yields Schiff base compounds (Casellato & Vigato, 1977); these are still one of the most prevalent mixed-donor ligands in coordination chemistry. In the past two decades, the synthesis, structure and properties of Schiff base complexes have stimulated much interest due to their noteworthy contributions in single molecule-based magnetism, materials science and the catalysis of many reactions such as carbonylation, hydroformylation, reduction, oxidation, epoxidation and hydrolysis (Casellato & Vigato 1977).…”

Section: S1 Commentmentioning

confidence: 99%

“…In the past two decades, the synthesis, structure and properties of Schiff base complexes have stimulated much interest due to their noteworthy contributions in single molecule-based magnetism, materials science and the catalysis of many reactions such as carbonylation, hydroformylation, reduction, oxidation, epoxidation and hydrolysis (Casellato & Vigato 1977). However, only a relatively small number of free Schiff base ligands have been characterized (Calligaris & Randaccio, 1987).…”

Section: S1 Commentmentioning

confidence: 99%

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4,4′-[Butane-1,4-diylbis(nitrilomethylidyne)]dibenzonitrile

2008

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Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.001 Å; R factor = 0.047; wR factor = 0.143; data-to-parameter ratio = 18.0.The title Schiff base compound, C 20 H 18 N 4 , lies across a crystallographic inversion centre and adopts E configurations with respect to the C N bonds. The asymmetric unit of the compound is composed of one half-molecule. The imino group is coplanar with the benzene ring. Within the molecule, the planar units are parallel but extend in opposite directions from the methylene bridge. In the crystal structure, neighbouring molecules are linked together by weak intermolecular C-HÁ Á ÁN hydrogen bonds involving the cyano N atoms. These form ten-membered rings, generating R 2 2 (10) ring motifs, and link the molecules along the c axis. Related literature

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“…Efforts to synthesize ligands capable of generating such dinuclear complexes have resulted in a large number of dinuclear ligands. 7 One of such ligand systems was obtained from "2+2" condensation of 2,6-diformyl-4-methylphenol with 1,3-diaminopropane. 8 Macrocyclic ligands derived by template condensation of 2,6-diformyl-4-methylphenol with simple diamines such as 1,2-ethylenediamine, 1,3-propanediamine, 1,4-butanediamine etc., generally produce 2:2 macrocyclic rings, encompassing two metal atoms, bridged by two phenoxide groups and each bound terminally by two imine nitrogen donors.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and biological activity of symmetric dinuclear complexes derived from a novel macrocyclic compartmental ligand

Mruthyunjayaswamy¹,

Ijare²,

Jadegoud³

2005

J. Braz. Chem. Soc.

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A phenol based novel macrocyclic binucleating compartmental ligand N,N-bis(2,6-diiminomethyl-4-methyl-1-hydroxyphenyl)malonoyldicarboxamide was prepared. The complexes were prepared by template method by reacting 2,6-diformyl-4-methylphenol, malonoyl dihydrazide and the metal chlorides of Cu(II), Ni(II), Co(II), Cd(II), Zn(II) and Hg(II) in methanol to get a series of dinuclear complexes. The complexes were characterized by elemental analyses, conductivity measurements, magnetic susceptibility data, IR, UV-Vis, ESR, NMR and FAB mass spectral data. The dinuclear nature of the complexes was confirmed on the basis of elemental analyses, magnetic susceptibility, ESR and FAB mass spectral data. The ligand as well as Cu(II), Ni(II), Co(II) and Zn(II) complexes were tested for their antibacterial and antifungal properties against Escherichia coli, Staphyloccocus aureus, Aspergillus niger and Fusarium oxysporum. Magnetic susceptibility measurements of Cu(II), Ni(II) and Co(II) complexes reveal that these complexes exhibit antiferromagnetic coupling behavior due to the presence of two metal ions in close proximity. FAB mass spectrum of the Cu(II) complex gave a clear evidence for the dinuclear nature. The ligand and the complexes were found to be less active against the tested bacteria, but the ligand alone was found active against the fungus Fusarium oxysporum.

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Transition metal complexes with binucleating ligands

Cited by 199 publications

References 157 publications

Highly ordered Nanomaterial Functionalized Copper Schiff Base Framework: Synthesis, Characterization, and Hydrogen Peroxide Decomposition Performance

Highly ordered Nanomaterial Functionalized Copper Schiff Base Framework: Synthesis, Characterization, and Hydrogen Peroxide Decomposition Performance

4,4′-[Butane-1,4-diylbis(nitrilomethylidyne)]dibenzonitrile

Synthesis, characterization and biological activity of symmetric dinuclear complexes derived from a novel macrocyclic compartmental ligand

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