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Morteza Montazerozohori,Sahar Yadegari,Asghar Naghiha,Somayeh Veyseh 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
A novel symmetrical Schiff base ligand was prepared by condensation reaction of 2,2-dimethyl-1.3-diaminopropane and (E)3-(2nitrophenyl)acrylaldehyde. The ligand and its Zn(II) coordinationcompounds were well characterized by the elemental analysis, FTIR, 1H, 13C NMR, UV–vis spectraand molar conductance. Thermal behaviors of all compounds were investigated from the roomtemperature to 600 ℃ with a heating rate of 10℃/min. Furthermore some decomposition thermo-kinetic parameters were evaluated by Coats–Redfern equation at each decomposition step. Electrochemical properties of ligand and its complexes were studied by cyclic voltammetry technique. Also antibacterial/antifungal activities of the ligand and its complexes were tested against three Gramnegativebacteria Escherichia coli (ATCC 25922), Salmonella spp. and Pseudomonas aeruginosa (ATCC 9027)and two Gram-positive bacteria Staphylococcus aureus (ATCC 6538) and Corynebacterium renale and alsothree fungi (Aspergillus niger, Penicillium chrysogenum and Candida albicans). The results exhibitedsuitable antibacterial/antifungal properties for ligand and Zn(II) complexes. The study has shown thatthe complexation of ligand to zinc center lead to enhancement of antibacterial/antifungal activity.
Morteza Montazerozohori,Sajjad Mojahedi Jahromi,Asghar Naghiha 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
In this work, synthesis of some nano-structure five coordinated cadmium complexes of a new tridentateSchiff base ligand (L) under ultrasonic conditions is presented. The ligand and its cadmium complexeswere characterized by various analyses such as FT-IR, UV–visible, 1H and 13C NMR spectra, XRD, SEM andTEM. According to applied techniques, the general formula of CdLX2 (X = Cl , Br , I , SCN and N3) wassuggested for the complexes. SEM, TEM and XRD analyses indicated that all complexes have nanostructuresize in the range of 20–60 nm. In the next step, ligand and its cadmium complexes weresubjected for in vitro antibacterial activities against two Gram-positive bacteria (Staphylococcus aureusand Bacillus subtilis) and two Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa). Moreover in vitro antifungal properties of the compounds against Candida albicans and Aspergillus nigerwere investigated. The results indicated that all compounds show acceptable antibacterial andantifungal activities. Furthermore, the interaction of these complexes with DNA indicated that bothligand and its complexes can destruct the DNA structure. In final, thermal behaviors of all compoundswere studied by TG/DTG/DTA analysis data. The thermo-diagrams showed that the compounds aredecomposed via 2–3 temperature stages. Some thermo-kinetic activation data including Arrheniusconstant, DE*, DH*, DS* and DG* of each thermal decomposition step were estimated graphically by useof experimental TGA data based on the Coats–Redfern equation.
Some new cadmium complexes: Antibacterial/antifungal activity and thermal behavior
Morteza Montazerozohori,Saeedeh Zahedi,Masoud Nasr-Esfahani,Asghar Naghiha 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Four new cadmium(II) Schiff base complexes formulated as CdLX2 (X = Cl , Br , I , SCN and L = bis (3(4-dimethylaminophenyl)-allylidene)-1,2-diaminoethane) were synthesized. All novel compounds were identified by spectroscopic techniques including FT-IR, 1H and 13C NMR, UV–vis spectra and physico-chemical methods such as molar conductivity, elemental analysis and melting point. Based on the physical and spectral evidences, the pseudo-tetrahedral geometry was proposed for all complexes. The in vitro antibacterial/antifungal activity of each compound was screened against four bacterial strains such as Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa as well as two fungal pathogens such as Candida albicans and Aspergillus niger. The biological testing data showed that all compounds were antimicrobial active against both Gram-positive and Gram-negative bacteria and two fungal strains. The bactericidal/fungicidal properties of compounds showed that the cadmium complexes were more bioactive than the parent ligand. Furthermore, the thermal behavior of all compounds was studied. The ligand was completely destructed through three temperature stages. Among the cadmium complexes, the CdL(NCS)2was found as the most stable while the CdLCl2 showed the least thermal stability. Besides some activation thermodynamic parameters such as E*, DH*, DS*, DG* were calculated using thermo-grams data by Coats–Redfern equation.
Morteza Montazerozohori,Masoud Nasr-Esfahani,Zohreh Moradi-shammi,Ameneh Malekhoseini 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
In this research, photocatalytic decolorization and its kinetics study of auramine dye at various aqueousbuffer and non-buffer media using nano-titanium dioxide in two different sizes of 15 and 70 nm in aphotocatalyic reactor under 400W high pressure mercury lamp irradiation under aerobic condition isdescribed. The effects of some physico-chemical parameters such as photocatalyst dosage, medium pHand irradiation time were investigated in the presence of two different nano-photocatalysts and then theresults were compared with each other. Kinetics study of photocatalytic treatment of auramine dyeresulted that the dye decolorization approximately follows a pseudo-first order kinetic behavioraccording to the Langmuir–Hinshelwood model. Ultimately, the observed rate constants, experimentalhalf-times, adsorption constants and decolorization rate constants at surface at buffer and non-buffermedia under aerobic conditions were evaluated.
Comparison of the influence of nanomaterials on response properties of copper selective electrodes
Mehrorang Ghaedi,Morteza Montazerozohori,Reza Sahraei 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4
Novel Cu2+ ion selective electrode in carbon paste matrices based on incorporation of bis(2-hydroxynaphthaldehydene)-1,6-hexanediamine (BHNHDA) has been developed. The influence of variables including sodium tetraphenylborate (NaTPB), ionophore, and amount of multiwalled carbon nanotubes (MWCNT) and Nujol and effect of two new nanoparticles including gold nanoparticles loaded on activated carbon (Au-NP-AC) and zinc sulfide nanoparticles loaded on activated carbon (ZnS-NP-AC)on the electrodes response was studied and optimized. At optimum specified conditions, the proposed electrodes have appropriate advantages such as short response times and suitable reproducibility and applicability for a period of at least 1 month without any significant divergence in slope and response properties. The sensor based on impregnations of MWCNT, Au-NP-AC and ZnS-NP-AC have wide linear range of concentration (6 x 10-8–1.0 x 10-1 mol L-1) and detection limit of lower than 4 x 10-8 mol L-1of Cu2+ ion. The electrodes based on incorporation of Au-NP-AC and ZnS-NP-AC have Nernstian response with slope of 29.34 ± 1.41 and 29.78 ± 1.23 mV decade-1 and response is independent of pH in the range of 2.0–5.0. Finally, these electrodes have been successfully applied for the determination of Cu2+ ions content in various real samples. Due to their acceptable selectivity coefficient, they are usable for accurate and successful evaluation of Cu2+ ions content in various real sample with complicated matrices.
M. Ghaedi,M. Montazerozohori,M. Sajedi,M. Roosta,M. Nickoosiar Jahromi,A. Asghari 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6
In the present study, the efficiency and usability of two sorbents including silver nanoparticles loaded on activated carbon and homemade activated carbon for removal and recoveries of heavy metal ions by solid-phase extractant were investigated. These materials characterization was carried out using different techniques such as SEM, XRD, BET and UV–vis. The analytes such as Zn2+, Cu2+ and Pb2+ ions was enriched onto sorbent and subsequent eluted and determined by flame atomic absorption spectroscopy. The influences of the analytical parameters including pH, type and condition of eluent, adsorption capacities and amount of adsorbent, condition of eluent and sample volume on the metal ions recoveries were optimized. The optimum pH value for the separation of metal ions on these new sorbents was 4. The adsorbed metal ions could be completely eluted by using 10.0 mL 4.0 mol L1 HNO3 solution. The loading of 30 mg of ligand onto 0.6 and 0.1 g of AC and Ag-NP-AC, respectively, make possible quantitative sorption of analytes. The accurate and easy determination of analytes in the presence of high limit of matrices constituent is possible without generation of significant problems. The applicability and accuracy of method were tested by its application for analytes quantification in complicated matrices with recoveries more than 91% and relative standard deviation lower than 5%.