International Journal of Bio-Inorganic Hybrid Nanomaterials: 1 (1)

Open Access Article

1 - Alkyl surface modification of nanoporous silica SBA-15 by click chemistry to obtain triazole products

In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalizedwith aminopropyl groups that were converted to propargyl-bearing moieties through the reaction withpropargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide More

In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalizedwith aminopropyl groups that were converted to propargyl-bearing moieties through the reaction withpropargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide alkyne click reactionwith sodium azide in order to obtain the corresponding triazole products. The covalent modification ofmesoporous silica surface with organic functional groups was confirmed by different characterizationtechniques including Fourier transform infrared spectroscopy, thermogravimetric analysis, Scanningelectron microscopy, Transmission electron microscopy, N2 adsorption-desorption isotherms and Ramanspectroscopy. The results have confirmed that SBA-15 was successfully functionalized with organicmoieties. No change in the periodic structure of the SBA-15 silica support was observed throughout thegrafting procedure. Surface area, pore size and pore volume decreased by attaching functional groupsto the pore surface. This approach provides a simple and convenient route to efficiently functionalize awide range of new structures on the surface of SBA-15. Manuscript profile

Open Access Article

2 - The immobilization of laccase enzyme from Trametes versicolor on the surface of porous zinc oxide nanoparticles and studying features of the immobilized enzyme

The laccase enzyme is the largest group of Oxidoreductase enzymes and is capable ofoxidizing a wide range of organic substrates to water along with molecular oxygen resuscitation. ZnOnanoparticles are known for their specific properties such as chemical stability, high More

The laccase enzyme is the largest group of Oxidoreductase enzymes and is capable ofoxidizing a wide range of organic substrates to water along with molecular oxygen resuscitation. ZnOnanoparticles are known for their specific properties such as chemical stability, high electrochemicalcoupling rates, and wide range of absorption of radiation as multifunctional compounds. In this study,ZnO porous nanoparticles were synthesized and then the laccase enzyme was stabilized from the sourceof vermicellum tramitis by surface absorption method on the surface of synthesized nanoparticles. Inthe following, kinetic parameters, temperature stability, reusability and sustainability of the stabilizedenzyme were measured and compared with the free enzyme. Given the results obtained at all threetemperatures (40, 50 and 60 °C), the stabilized enzyme shows more temperature stability than the freeenzyme in desired time range. The kinetic parameters Vm and Km did not significantly change withrespect to the free enzyme. Enzyme activity returned to zero after 10 cycles of use and recycling. Whilethe free enzyme lost its activity after three weeks of maintenance in laboratory condition, the stabilizedenzyme retained 30% of its initial activity. These results indicate that ZnO porous nanoparticles can beused as a suitable substrate for the stabilization of laccase enzyme by surface adsorption method, andimproves the stability parameters of the enzyme without affecting the kinetic properties of the enzyme. Manuscript profile

Open Access Article

3 - Solid phase extraction of trace cobalt (II) in industrial wastewaters by modified nanotube carbon carboxyl and its determination with flame atomic spectroscopy

Applying a simple and selective sample preparation procedure prior to instrumentalanalysis is the most important and crucial step in an analytical process. Up to now, various samplepreparation techniques based on solid phase extraction (SPE) systems have been developed More

Applying a simple and selective sample preparation procedure prior to instrumentalanalysis is the most important and crucial step in an analytical process. Up to now, various samplepreparation techniques based on solid phase extraction (SPE) systems have been developed to isolatevarious types of analytes from different matrices. In the method presented for preconcentration andmeasurement of trace amounts of cobalt (II) ions in aqueous samples, carbon nanotubes functionalizedwith carboxyl were used for improving the extraction and preconcentration action. Measurement of Co2+ion concentration in aqueous solutions was performed by flame atomic absorption spectroscopy. Theparameters including the extraction including pH, amount and type of desorption solvent, extractiontime, the effect of other ions, etc. were optimized. The concentration factor, level of detection (LOD)of the method, and relative standard deviation (RSD %) were obtained as 20.83, 6 μg.L-1, and 1.16%,respectively. Manuscript profile

Open Access Article

4 - Anti-tumor activity of Fe (III), Co(II) and Pd(II) complexes of N3-{phenyl [(4-pyridylcarbonyl)amino]methyl}

An anti-tumor compound as N3-{phenyl [(4-pyridylcarbonyl) amino] methyl} weresynthesized and identified (NPPA). Fe (III), Co(II) and Pd(II) metal complexes of this ligand preparedby reaction of chloride salt of Fe (III), Co(II) and Pd(II) with NPPA in dry acetonitrile. More

An anti-tumor compound as N3-{phenyl [(4-pyridylcarbonyl) amino] methyl} weresynthesized and identified (NPPA). Fe (III), Co(II) and Pd(II) metal complexes of this ligand preparedby reaction of chloride salt of Fe (III), Co(II) and Pd(II) with NPPA in dry acetonitrile. Identification andCharacterization of the ligand was performed by FT-IR, 1H-NMR spectroscopy and elemental analysisand all complexes were characterized by several techniques using elemental analyze (C, H, N), FTIR,1H-NMR (except Co complex), electronic spectroscopy and molar conductance measurements.These new compounds were used to biological studies; and its anticancer properties against the twotypes of cancer cells such as k562 (human chronic myeloid leukemia) and Jurkat (human T lymphocytecarcinoma) was revealed. The results of in vitro activities were very interesting and promising. Theseresults showed that complexes offer a new outlook for chemotherapy. It should be noted that the resultssuggest that complex showed greater effects than ligand. Manuscript profile

Open Access Article

5 - Quantum current modelling on tri-layer graphene nanoribbons in limit degenerate and non-degenerate

Graphene is determined by a wonderful carrier transport property and high sensitivityat the surface of a single molecule, making them great as resources used in Nano electronic use.TGN is modeled in form of three honeycomb lattices with pairs of in-equivalent sites as { More

Graphene is determined by a wonderful carrier transport property and high sensitivityat the surface of a single molecule, making them great as resources used in Nano electronic use.TGN is modeled in form of three honeycomb lattices with pairs of in-equivalent sites as {A1, B1},{A2, B2}, and {A3, B3} which are located in the top, center and bottom layers, respectively. Trilayergraphene has two types of stable configurations, ABA and ABC stacking orders. In both types, the firsttwo layers are Bernal-stacked, where one sub lattice of the middle layer is located above the center ofthe hexagons of the bottom layer. The TGN is shown to have different electronic properties which arestrongly dependent on the interlayer stacking sequence. ABA-stacked TGN with width and thicknessless than De-Broglie wave length can be assumed as a one dimensional material. The present researchmodels transmission coefficient of the Schotcky structure in the graphene-based transistor based onsemiconducting channel width and then analysis its quantum properties given dependence on structuralparameter. At the same time, the quantum current is presented based on the transmission coefficient forthe trilayer graphene. Then, we obtain the quantum current of the proposed structure in the degenerateand non-degenerate states and compare it with experimental data. Manuscript profile

Open Access Article

6 - Quantum mechanical study of electronic and structural properties of methyl benzoate in interaction with boron nitride (BN) nanotube

To determine the non-bonded interaction between methyl benzoate and boron nitridenanotube, we focused on an armchair single-wall boron nitride nanotube (9,9) With length 5 angstroms.The geometry of molecules was optimized using B3LYP method with 6-31g* basis set. Also r More

To determine the non-bonded interaction between methyl benzoate and boron nitridenanotube, we focused on an armchair single-wall boron nitride nanotube (9,9) With length 5 angstroms.The geometry of molecules was optimized using B3LYP method with 6-31g* basis set. Also reactivityand stability of methyl benzoate and boron nitride nanotube (9,9) was checked. Then NBO, FREQ,adsorption energy of methyl benzoate alone and in the presence of BNNT Field were derived to estimatemethyl benzoate structural stability. The results of any order was found reduce of reactivity and increaseof stability for methyl benzoate in the presence BNNT field. Manuscript profile

XML

List of Articles