Synthesis, characterization and solid state conductivity of nano-size ionic Schiff base polymers of Cu2+, Zn2+ and VO2+ containing viologen moieties

2019 ◽  
Vol 43 (42) ◽  
pp. 16468-16477
Author(s):  
Zohreh S. Ghavami ◽  
Gholamhossein Grivani
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Organic Semiconductors ◽  
Schiff Base Ligand ◽  
Conductivity Measurements ◽  
Schiff Base Polymers ◽  
Nano Size

The new nano size ionic metallo-Schiff base polymers (IMSPs) were synthesized by reaction of Schiff base ligand of L and VO (acac)2, ZnCl2 and CuCl2. The solid state conductivity measurements candidate them as new metallo-organic semiconductors.

A Zn(II) luminescent complex with a Schiff base ligand: solution, computational and solid state studies

2018 ◽  
Vol 71 (6) ◽  
pp. 874-889 ◽  
Author(s):  
Sebastián Martínez ◽  
Fernando Igoa ◽  
Ignacio Carrera ◽  
Gustavo Seoane ◽  
Nicolás Veiga ◽  
...  
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Schiff Base Ligand

scholarly journals Synthesis, Characterization and Thermal Studies of Fe(II), Co(II), Ni(II) and Cu(II) Complexes with bis-(4-benzylidenamino-phenyl)-methane Schiff base ligand

2021 ◽  
Vol 2063 (1) ◽  
pp. 012004
Author(s):  
Atared F. Hassan ◽  
Hiba H. Sabah ◽  
Afaq A. Turki
Keyword(s):  
Schiff Base ◽  
Metal Ions ◽  
General Formula ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Thermal Studies ◽  
Molar Conductivity ◽  
Conductivity Measurements ◽  
Infra Red ◽  
Thermal Stable

Abstract A new series of Co(II), Fe(II), Cu(II) and Ni(II) complexes of Bis–(4-benzylidenamino-phenyl)-methane (L) have been prepared and characterized. The complexes conform to general formula [CoL(H2O)3] Cl2, [FeL(H2O)5]SO4.2H2O, [CuL(H2O)5] NO3 and [NiL(H2O)3Cl2], Infra red spectra and elemental analysis reveal uni-dentate coordination of Schiff base to metal ions. Molar conductivity measurements show that complexes (I, III) behave as 2:1 electrolyte while complex (II) behave as 1:1 electrolyte. The thermal studies for complexes shows that the complexes are thermal stable.

Impact of the Schiff base ligand substituents on the solid state and solution properties of eleven iron(iii) complexes

2019 ◽  
Vol 43 (35) ◽  
pp. 13916-13928 ◽  
Author(s):  
Lukáš Pogány ◽  
Barbora Brachňaková ◽  
Petra Masárová ◽  
Ján Moncol ◽  
Ján Pavlik ◽  
...  
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Schiff Base Ligand ◽  
Molecular Design ◽  
Redox Properties ◽  
Schiff Base Complexes ◽  
Solution Properties

A series of novel iron(iii)-Schiff base complexes have been prepared and structurally characterised. Their stereochemical, magnetic and redox properties were correlated with the molecular design of the corresponding N3O2-pentadentate Schiff base ligand.

{6,6′-Dimethoxy-2,2′-[ethane-1,2-diylbis(nitrilomethylidyne)]diphenolato}nickel(II) chloroform solvate

2006 ◽  
Vol 62 (5) ◽  
pp. m948-m949 ◽  
Author(s):  
Yu-Ye Yu
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Schiff Base Ligand ◽  
Solid State Reaction ◽  
Title Compound ◽  
Coordination Geometry ◽  
Square Planar ◽  
Salen Ligand

The title compound, [Ni(C18H18N2O4)]·CHCl3, has been synthesized by the solid-state reaction of Ni(OAc)2·4H2O and the Schiff base ligand N,N′-ethylene-bis(3-methoxysalicylaldehyde) [abbreviated as H2(3-MeO-salen)]. The Ni atom adopts a slightly deformed square-planar coordination geometry in which the 3-MeO-salen ligand acts as a cis-N2O2 donor.

scholarly journals Synthesis, Spectral Characterization and Antimicrobial Evaluation of New Metal Complexes of Novel Schiff Base Derived from 4,6-dihydroxy-1,3-phenylenediethanone

2021 ◽  
Author(s):  
Yasmin mamdoh hussien Ahmed ◽  
Gehad G. Mohamed
Keyword(s):  
Staphylococcus Aureus ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Magnetic Moment ◽  
Magnetic Measurements ◽  
Diffusion Method ◽  
Spectral Studies ◽  
Conductivity Measurements ◽  
Absorption Bands ◽  
Elemental Analyses

Abstract A new tetradentate Schiff base ligand was prepared from condensation of 4,6-dihydroxy-1,3-phenylenediethanone with ethane-1,2-diylbis(oxy)diethanamine. The ligand forms complexes in good yield. The Schiff base and its complexes were characterized by analytical (CHN elemental analyses, solubility, melting point, conductivity) measurements, spectral (IR, UV-vis, 1H NMR and MS) and magnetic measurements. The elemental analyses, Uv-vis spectra, and room temperature magnetic moment data and theoretically through density function theory were used as characterizing techniques in supporting of further interpretation of the complexes structures. The results of elemental analyses, EI-mass and conductivity measurements confirmed the stoichiometry of the ligand and its complexes while the characteristic absorption bands and resonance peaks in IR and NMR spectra confirmed the formation of the ligand frameworks around the metal ions. The octahedral environment for complexes derived from Schiff base ligand have been confirmed on the basis of results of electronic and diffused reflectance spectral studies and magnetic moment measurements. Detailed studies of the thermal properties of the Schiff base ligand and complexes were investigated by thermogravimetric technique. Moreover, the molecular docking into (PDB: 6NE0) was the DNA binding and supports the experimental finding and 6IY0 Crystal structure of conserved hypothetical protein SAV0927 from Staphylococcus aureus subsp. aureus Mu50. The synthesized ligand and its complexes were tested for in vitro antimicrobial activity against Candida albicans, Bacillus subtilis, Aspergillus flavus, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus by using agar-well diffusion method.

scholarly journals Synthesis, Characterization, and Biological Activity of Some Transition Metal Complexes Derived from Novel Hydrazone Azo Schiff Base Ligand

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
C. Anitha ◽  
S. Sumathi ◽  
P. Tharmaraj ◽  
C. D. Sheela
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Base Ligand ◽  
Second Harmonic ◽  
Biological Activities ◽  
Diffusion Method ◽  
Spectral Studies ◽  
Planar Geometry ◽  
Conductivity Measurements ◽  
Tetrahedral Geometry

A series of metal(II) complexes ML where M = VO(II), Co(II), Ni(II), Cu(II), and Zn(II) have been synthesized from azo Schiff base ligand (N′E)-N′-(5-((4-chlorophenyl)diazenyl)-2-hydroxybenzylidene)-2-hydroxybenzohydrazide and characterized on the basis of elemental analyses, electronic, IR, and 1H NMR spectra, magnetic susceptibility and also by aid of scanning electron microscopy (SEM), X-ray powder diffraction, fluorescence spectral studies, and molar conductivity measurements. Conductivity measurements reveal that the complexes are nonelectrolytes. Spectroscopy and other analytical studies reveal distorted square planar geometry for copper, square-pyramidal geometry for oxovanadium, and tetrahedral geometry for other complexes. Redox behavior of the copper(II) complex has been studied with cyclic voltammetry, and the biological activities of the ligand and metal complexes have been studied against several microorganisms by the well diffusion method. All synthesized compounds can serve as potential photoactive materials as indicated from their characteristic fluorescence properties. The second harmonic generation (SHG) efficiency of the ligand was measured and found to be higher than that of urea and KDP. The SEM image of the copper(II) complex implies that the size of the particles is 50 nm.

scholarly journals Catecholase-Like Activity and Theoretical Study in Solid State of a New Ru(III)-Schiff Base Complex

2021 ◽  
Vol 68 (1) ◽  
pp. 212-221
Author(s):  
Niladri Biswas ◽  
Sandeepta Saha ◽  
Ennio Zangrando ◽  
Antonio Frontera ◽  
Chirantan Roy Choudhury
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Schiff Base Ligand ◽  
Metal Ion ◽  
Theoretical Study ◽  
Schiff Base Complex ◽  
Aerobic Condition ◽  
Halogen Bonding ◽  
Molecular Formula ◽  
Charge Balance

A new ruthenium(III) complex of molecular formula [Ru(PPh3)Cl2(L)] (1) has been synthesized using the Schiff base ligand obtained from 5-chlorosalicylaldehyde and N,N-dimethylethylenediamine and characterized by FT-IR, UV-Vis, cyclic voltammetry and single crystal X-ray structural analysis. The metal ion exhibits a slightly distorted octahedral environment where the chelating Schiff base ligand contributes with its NNO donor set. The coordination geometry around the Ru(III) ion is completed by a PPh3 ligand and two chloride anions, and the charge balance is assured by the phenoxo oxygen of the Schiff base. With the aim to analyse the energy related to the halogen bonding interactions in solid state, a theoretical study has been performed on complex 1, by using the MEP and NCl plot computational tools. Furthermore, complex 1 shows catecholase-like activity in conversion of the model substrate 3,5-di-tert-butylcatechol (3,5-DTBC) to the corresponding 3,5-di-tert-butylquinone (3,5-DTBQ) under aerobic condition. The parameters regarding the enzymatic kinetics have been evaluated from the Lineweaver-Burk plot using the Michaelis-Menten approach of enzyme catalysis. A significant high T.O.N value (2.346 × 103 h–1) indicates that complex 1 has a very good catalytic efficiency towards 3,5-DTBC.

Sign in / Sign up

Export Citation Format

Share Document