Sayed Alireza Musavi

Yasouj University, Yesūj, Kohgīlūyeh va Būyer Aḩmad, Iran

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Publications (9)17.57 Total impact

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    ABSTRACT: Three new four coordinated zinc(II) complexes have been synthesized and characterized by IR, UV, elemental analysis, 1H and 13C NMR and X-ray single crystal analysis. The elemental analyses of the complexes are in agreement with general formula of ZnLX2 wherein L= Schiff base ligand and X= Cl-, Br- and I-. Low molar conductivities in DMF indicated non-electrolyte character for all complexes. Spectroscopic studies well confirmed coordination via azomethine nitrogens of the ligand to zinc ion. The single crystal X-ray analysis shows that the ZnLBr2 crystallizes in the triclinic crystal system with space group P1¯. It contains two crystallographically independent molecules noted as A and B, with both Zn1A and Zn1B being almost in perfect tetrahedral environments (τ4 = 0.94 for Zn1A and τ4 = 0.93 for Zn1B). Detailed structural analysis shows that there are three non-classical hydrogen bondings of C–H…Br in the structure. Various C-H…π and C-H…Br interactions play an important role in stabilizing the molecular structure and then give rise to a 3D supramolecular structure for ZnLBr2 complex. After characterization, the Schiff base and its complexes were screened in vitro for their antibacterial and antifungal activities by disk diffusion technique. Also the ability of the complexes for DNA cleavage was studied by agarose gel electrophoresis method. Finally, thermal behavior of the complexes has been studied by thermo-gravimetry and then some activation kinetics parameters of decomposition steps were evaluated based on TG/DTG plots.
    Arabian Journal of Chemistry 11/2014; · 2.68 Impact Factor
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    ABSTRACT: Two new cadmium(II) complexes with the formula of CdL2(NCS)2 and CdL2(N3)2 (in which L is 2,2-dimethyl-N,N'-bis-(3-phenyl-allylidene)-propane-1,3-diamine) have been synthesized and characterized by elemental analysis, molar conductivity measurements, FT/IR, UV-Visible, (1)H and (13)C NMR spectra and X-ray studies. The crystal structure analysis of CdL2(NCS)2 indicated that it crystallizes in orthorhombic system with space group of Pbca. Two Schiff base ligands are bonded to cadmium(II) ion as N2-donor chelate. Coordination geometry around the cadmium ion was found to be partially distorted octahedron. The Cd-Nimine bond distances are found in the range of 2.363(2)-2.427(2)Å while the Cd-Nisothiocyanate bond distances are 2.287(2)Å and 2.310(2)Å. The existence of C-H⋯π and C-H⋯S interactions in the CdL2(NCS)2 crystal leads to a supramolecular structure in its network. Then cadmium complexes were screened in vitro for their antibacterial and antifungal activities against two Gram-negative and two Gram-positive bacteria and also against Candida albicans as a fungus. Moreover, the compounds were subjected for DNA-cleavage potential by gel electrophoresis method. Finally thermo-gravimetric analysis of the complexes was applied for thermal behavior studies and then some thermo-kinetics activation parameters were evaluated.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 08/2014; 137C:389-396. · 2.13 Impact Factor
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    ABSTRACT: Some novel nano-sized structure zinc complexes of a new Schiff base ligand entitled as (3-nitro-benzylidene)-{2-[2-(3-nitro-phenyl)-imidazolidine-1-yl]-ethyl}-amine(L) with general formula of ZnLX2 wherein X = Cl-, Br-, I-, SCN- and N3- have been synthesized under ultrasonic conditions. The ligand and its complexes have been characterized by elemental analysis, molar conductance measurements, FT-IR, 1H and 13C NMR and UV-Visible spectroscopy. The resulting data from spectral investigation especially 1H and 13C NMR well confirmed formation of an imidazolidine ring in the ligand structure. Transmission electron microscopy (TEM) showed nano-size structures with average particle sizes of 21.80-78.10 nm for the zinc(II) Schiff base complexes. The free Schiff base and its Zn(II) complexes have been screened in vitro both for antibacterial activity against some gram-positive and gram-negative bacteria and also for antifungal activity. The metal complexes were found to be more active than the free Schiff base ligand. The results showed that ZnL(N3)2 is the most effective inhibitor against Escherichia coli, Pseudomonas aereuguinosa, Staphylococcus aureus and Candida albicans while ZnLBr2 was found to be more effective against Bacillus subtillis than other compounds. Moreover, DNA cleavage potential of all compounds with plasmid DNA was investigated. The results showed that the ligand and ZnLCl2 complex cleave DNA more efficiently than others. In final, thermal analysis of ligand and its complexes revealed that they are decomposed via 2-3 thermal steps in the range of room temperature to 1000 °C. Furthermore some activation kinetic parameters such as A, E*, ΔH*, ΔS* and ΔG* were calculated based on TG/DTA plots by use of coats - Redfern relation. Positive values of activation energy evaluated for the compounds confirmed the thermal stability of them. In addition to, the positive ΔH*, and ΔG* values suggested endothermic character for the thermal decomposition steps.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 08/2014; 129:382–391. · 2.13 Impact Factor
  • Journal of Thermal Analysis and Calorimetry 01/2014; · 2.21 Impact Factor
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    ABSTRACT: An imidazolidine Schiff base ligand, (E)-N-(4-nitrobenzylidene)-2-(2-(4-nitrophenyl)imidazolidine-1-yl) ethaneamine (L) has been synthesized by a condensation reaction between N′-(2-aminoethyl)-ethane-1,2-diamine and 4-nitrobenzaldehyde in 1:2 ratio and then characterized by physical and spectral data. Some new complexes with general formula of MLX2(wherein M is Zn(II), Cd(II) and Hg(II) and X is chloride, bromide and/or iodide) have been prepared and characterized by physical and spectroscopic studies such as elemental analysis, molar conductance measurements, FT-IR, 1H and 13C NMR and UV–Visible electronic spectra. The spectral data indicate that the ligand is coordinated to zinc(II) as a bidentate ligand in imidazolidine form but it binds to other metal salts as bis-imine tridentate ligand. Furthermore, cyclic voltammetry technique was applied for recording the electrochemical behaviour of the ligand and its complexes. Cyclic voltamogram of the ligand showed that it is reduced at four cathodic potentials and then oxidized only in two anodic potentials in reverse direction. The electrochemical behaviour of ligand is affected by coordination. Thermal analysis of ligand and its complexes revealed that they are decomposed via 3-4 thermal steps. Moreover, some activation thermodynamic parameters such as A, E*, ΔH*, ΔS* and ΔG* were calculated based on TG/DTA plots using Coats–Redfern relation. The Schiff base ligand and its complexes have also been tested in vitro to evaluate their antimicrobial activities. Figure An imidazolidine Schiff base ligand entitled as (E)-N-(4-nitrobenzylidene)-2-(2-(4-nitrophenyl)imidazolidine-1-yl)ethaneamine (L) and some its IIB metal ion complexes have been synthesized and characterized by some physical and spectroscopic techniques. Then electrochemical properties, thermal behavior (TG/DTA) and in vitro antibacterial/antifungal activities of the ligand and its complexes were studied.
    Journal of Chemical Sciences 01/2014; 126(1):227-238. · 1.22 Impact Factor
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    ABSTRACT: A new symmetric bidentate Schiff base N, N′ bis(4-fluorobenzal-dehydene)-1,2-diaminoethane(L) and its complexes with general formula MLX2 (M= Zn(II), Cd(II) and Hg(II) and X=chloride, bromide, iodide, thiocyanate and azide) have been prepared. The ligand and complexes have been established by microanalysis, electronic, FT-IR, 1H and 13C NMR spectra, and by molar conductivity measurements. All compounds are non-electrolytes in chloroform or DMSO-d6. The thermal behavior of the complexes shows weight loss by decomposition of the anions and ligand segments in the subsequent steps. Some activation thermodynamic parameters such as E*, ∆H*, ∆S* and ∆G* were calculated from thermal analysis.
    E-Journal of Chemistry 05/2012; 9. · 0.62 Impact Factor
  • Morteza Montazerozohori, Shiva Joohari, Sayed Alireza Musavi
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    ABSTRACT: A new unsymmetrical bidentate Schiff base N(E),N′(E)-bis[(E)-2-methyl-3-phenylallylidene]-propane-1,2-diamine and four zinc complexes with general formula Zn(BMPAPD)X2 in which X = Cl, Br, I, or SCN, have been prepared and characterized by elemental analysis, mass spectrometry, H NMR (Nuclear Magnetic Resonance), C NMR, Fourier Transform–Infrared and Ultraviolet–Visible spectra, and molar conductance. All compounds are nonelectrolytes in dimethyformamide. The molar conductance and spectral properties indicate coordination of halides and thiocyanate ions to zinc in pseudo-tetrahedral geometry.
    Journal of Coordination Chemistry 04/2009; 62(8):1285-1292. · 2.22 Impact Factor
  • Morteza Montazerozohori, Shiva Joohari, Sayed Alireza Musavi
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    ABSTRACT: Synthesis and spectroscopic studies on four-coordinate complexes of cadmium(II) and mercury(II) halides with a new asymmetrical bidentate Schiff base ligand of N,N'-bis[alpha-methylcinamaldehydene]propane-1,2-diamine(L) are described. The ligand and its complexes were characterized by elemental analysis, molar conductance, UV-visible spectra, FT-IR spectra, MS, (1)H NMR and (13)C NMR spectra. The complexes are non-electrolytes in DMF. The electronic spectra of the complexes were recorded in DMF solution. (1)H and (13) C NMR spectra been studied in CDCl(3). The molar conductance as well as spectral properties indicated the complexes do not dissociate in DMF and retain their coordination. FT-IR and NMR spectra of the complexes exhibit downfield as well as upfield shifts of the free ligand resonances that show change in geometry during the coordination. The suggested structure of the complexes is pseudo-tetrahedral. Molecular structures of the complexes have been optimized by MM+ calculations that supported pseudo-tetrahedral geometry around the metal (II) ions.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 03/2009; 73(2):231-7. · 2.13 Impact Factor
  • Morteza Montazerozohori, Sayed Alireza Musavi
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    ABSTRACT: A new symmetric bidentate Schiff base N,N′-bis [(E)-3-(2-nitrophenyl)allylidene)]benzene-1,2-diamine (L) and its complexes with general formula ZnLX2 (X = chloride, bromide, iodide, thiocyanate and azide) are described. The authenticity of the ligand and complexes have been established by microanalysis, electronic, MS, FT-IR, H and C NMR spectra, and by molar conductivity measurements. All compounds are non-electrolytes in DMF. The analytical data confirmed that the metal to ligand ratio in the complexes is 1 : 1. The complexes have pseudotetrahedral geometry with C2V point group.
    Journal of Coordination Chemistry 12/2008; 61(24):3934-3942. · 2.22 Impact Factor