Mononuclear and binuclear Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes of schiff-base ligands derived from 7-formyl-8-hydroxyquinoline and diaminonaphthalenes

Ismail, Tarek M.

doi:10.1080/0095897042000274733

Cited by 61 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, the first two low energy bands observed in the region of 500-900 nm in all of the complexes are characteristic of nickel(II) in octahedral environment. The octahedral geometry of Ni(II) complexes is further supported by the value of ] 2 /] 1 ratio which lies in the region of 1.498-1.504 [26,37].…”

Section: Serial Number Complexmentioning

confidence: 80%

“…The paramagnetism of nickel(II) complexes (1) to (5) rules out the possibility of square planar structure and tetrahedral structure can be discarded on the basis of the magnitude of the magnetic moment. Complexes (1) to (5) have magnetic moment values in the region of 2.85-3.45 BM which is typical of an octahedral Ni(II) compound [26,27].…”

Section: Magnetic Momentmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis, Characterization, and Structural Assessment of Ni(II) Complexes Derived from Bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone

Chakrabarty

Ahmed

Lal

2015

International Journal of Inorganic Chemistry

View full text Add to dashboard Cite

The monometallic nickel(II) complexes [Ni(H2nsh)(A)2]·nH2O (where A = water (H2O), n=0 (1); pyridine (py), n=2 (2); 2-picoline(2-pic), n=0 (3); 3-picoline(3-pic), n=2 (4); and 4-picoline(4-pic), n=0 (5)) and homobimetallic nickel(II) complexes [Ni2(nsh)(A)4]·nH2O (where A = water (H2O), n=1 (6); pyridine (py), n=4 (7); 2-picoline(2-pic), n=4 (8); 3-picoline(3-pic), n=4 (9); and 4-picoline(4-pic), n=4 (10), resp.) have been synthesized in methanol from bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone (H4nsh). The complexes have been characterized by elemental analyses, molar conductance, magnetic moment, and electronic and IR and TGA/DTA spectroscopic studies. The monometallic complexes (1) to (5) are found to have octahedral stereochemistry while complexes (6) to (10) are found to have distorted octahedral stereochemistry in which one of the Ni(II) centres is present in N2O2 coordination sphere and another Ni(II) centre is bonded to it through phenolate oxygen atoms via oxo-bridging.

show abstract

Section: Serial Number Complexmentioning

confidence: 80%

Section: Magnetic Momentmentioning

confidence: 99%

Synthesis, Characterization, and Structural Assessment of Ni(II) Complexes Derived from Bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone

Chakrabarty

Ahmed

Lal

2015

International Journal of Inorganic Chemistry

View full text Add to dashboard Cite

show abstract

“…Yb 3? ) (Moawad and Hanna 2002;Ismail 2005 In addition, isosbestic points at 342-357 nm for ligands and at 400-410 nm for Yb(III) complexes are observed, indicating that the reaction between every investigated compound and DNA takes place by an equilibrium. Absorption titration can monitor the interaction of a compound with DNA.…”

Section: Ultraviolet-visible (Uv-vis) Spectroscopy Study For Dna Bindmentioning

confidence: 89%

“…All the complexes show 3,422-3,385 br assigned to m(OH) of H 2 O; 976-937 w assigned to q r (H 2 O) and 675-615 w assigned to q w (H 2 O), indicating that there are coordinated water molecules participating in the Yb(III) complexes(Moawad and Hanna 2002;Ismail 2005). (2) All the complexes show 1,107-1,103 assigned to m(C-OM), indicating that the binding of metal ion to every ligand through an O-M covalent linkage takes place(Ou-Yang 1997).…”

mentioning

confidence: 99%

Crystal structures, antioxidation and DNA binding properties of Yb(III) complexes with Schiff-base ligands derived from 8-hydroxyquinoline-2-carbaldehyde and four aroylhydrazines

Zhou

2009

Biometals

View full text Add to dashboard Cite

X-ray crystal and other structural analyses indicate that Yb(III) and all four newly synthesized ligands can form a binuclear Yb(III) complex with a 1:1 metal to ligand stoichiometry by octacoordination at the Yb(III) center. Investigations of DNA binding properties show that all the ligands and Yb(III) complexes can bind to Calf thymus DNA through intercalations with the binding constants at the order of magnitude 10(5)-10(7) M(-1), but Yb(III) complexes present stronger affinities to DNA than ligands. All the ligands and Yb(III) complexes may be used as potential anticancer drugs. Investigations of antioxidation properties show that all the ligands and Yb(III) complexes have strong scavenging effects for hydroxyl radicals and superoxide radicals but Yb(III) complexes show stronger scavenging effects for hydroxyl radicals than ligands.

show abstract

“…There are characteristic stretching frequencies at 3475-3460 cm -1 , indicating the presence of O-H vibration of the coordinated water molecules to the complexes. The absorption bands appearing between 3334-3306 cm -1 indicated the stretching vibration for N-H bonds [51]. Absorption peaks in the range of 3115-3045 cm -1 are assigned to the C-H stretching vibration in the benzene/pyridine rings, lower wavenumber than free C-H bonds.…”

Section: Ir Spectra Analysismentioning

confidence: 97%

Mixed-Ligand Ni(II), Co(II) and Fe(II) Complexes as Catalysts for Esterification of Biomass-Derived Levulinic Acid with Polyol and in Situ Reduction via Hydrogenation with NaBH4

Lee

Hossain

2019

Journal of Renewable Materials

View full text Add to dashboard Cite

Synthesizing polyol-based ester from biomass feedstocks for the preparation of biolubricant overcomes the dependence on petroleum oil usage. Albeit biomass-derived bio-oil is an alternative for the production of polyol ester, upgrading is essential prior to use as biolubricant. Levulinic acid (LA), obtained from bio-oil was applied for the catalytic esterification with two polyols, e.g., trimethylolpropane (TMP) and pentaerythritol (PE), in the presence of mixedligand Ni(II), Co(II), and Fe (II) complexes as catalyst. New mixed-ligand coordination complexes with empirical formula; [Ni(Phe)(Bpy)Cl].H2O, [Co(Phe)(Bpy)Cl].H2O, and [Fe(Phe)(Tyr)Cl].H2O were synthesized by the reaction of ligands [L-phenylalanine (Phe), 4,4'-bipyridine (Bpy), and L-tyrosine (Tyr)] with metal chloride salts and characterized by elemental analysis, magnetic susceptibility, FTIR, TGA/DTA, powder-XRD, and SEM techniques.This study aims to investigate the catalytic activities of the complexes via esterification reaction of levulinic acid with trimethylolpropane and pentaerythritol. In addition, these catalysts were further employed for the in situ hydrogenation of levulinate esters via NaBH4 at room temperature upon refluxing. Indeed, the iron(II) complex was more potential, exhibiting its efficiency as a homogeneous catalyst for esterification-hydrogenation reaction for synthesizing ester-based oils.

show abstract

Mononuclear and binuclear Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes of schiff-base ligands derived from 7-formyl-8-hydroxyquinoline and diaminonaphthalenes

Cited by 61 publications

References 15 publications

Synthesis, Characterization, and Structural Assessment of Ni(II) Complexes Derived from Bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone

Synthesis, Characterization, and Structural Assessment of Ni(II) Complexes Derived from Bis(2-hydroxy-1-naphthaldehyde)succinoyldihydrazone

Crystal structures, antioxidation and DNA binding properties of Yb(III) complexes with Schiff-base ligands derived from 8-hydroxyquinoline-2-carbaldehyde and four aroylhydrazines

Mixed-Ligand Ni(II), Co(II) and Fe(II) Complexes as Catalysts for Esterification of Biomass-Derived Levulinic Acid with Polyol and in Situ Reduction via Hydrogenation with NaBH4

Contact Info

Product

Resources

About