نتایج جستجو برای: density functional theory dmf

تعداد نتایج: 1660248  

Journal: :iranian journal of mathematical chemistry 2012
m. mazloum-ardakani h. beitollahi h. farrokhpour a. r. khoshroo

electrode potential of 2-(2,3-dihydroxy phenyl)-1,3-dithiane (dpd) was investigated by means of cyclic voltammetry (cv) at various potential scan rates. the calculated value was compared with the experimental value obtained by cyclic voltammetry (cv). all experiments were done in aqueous phosphate buffer solutions at different phs. the experimental redox potential of dpd was obtained to be 0.75...

Journal: :journal of physical & theoretical chemistry 2014
m. anafcheh f. naderi m. ezatvar h. masoomi

dft calculations were applied to evaluate the electronic and magnetic properties of zigzag bc2nnanotubes based on the 13c, 15n, and 11b nmr parameters and natural charge analysis. weconsidered three types of zigzag nanotubes, zz-1, zz-2, and zz-3 (n, 0) with n = 8, 12, and 14. theobtained results indicated the divisions of the electrostatic environments around c nuclei into a fewlayers, consist...

Journal: :iranian chemical communication 2016
vahid moeini seyed hojatollah rahimi zohre rakhsha

in this work, we report results of calculations based on the density functional theory of different species metal-ozone, containing mercury, silver and gold. the chosen species range from small molecules and large transition-metal containing ozone with mercury, silver and gold complexes. a comparative analysis of the description of the metal-oxygen bond obtained by different methodologies is pr...

Journal: :nanomedicine journal 0
f. shojaie department of photonic, institute of science and high technology and environmental sciences, graduate university of advanced technology, kerman, iranسازمان اصلی تایید شده: دانشگاه تحصیلات تکمیلی صنعتی کرمان (graduate university of advanced technology) m. dehghan department of photonic, institute of science and high technology and environmental sciences, graduate university of advanced technology, kerman, iranسازمان اصلی تایید شده: دانشگاه تحصیلات تکمیلی صنعتی کرمان (graduate university of advanced technology)

objective(s): first principles calculations were performed to study four multiple sclerosis drugs namely, ampyra, fingolimod, mitoxantrone and eliprodil in gas and liquid phases using density functional theory (dft). computational chemistry simulations were carried out to compare calculated quantum chemical parameters for ampyra, fingolimod, mitoxantrone and eliprodil. materials and methods: al...

Journal: :organic chemistry research 2016
mehdi nabati mehrdad mahkam

one main group of organic chemistry is related to the aromatic compounds. in the present work, we replaced the ch group of benzene by silicon and nitrogen analogues. then, density functional theory (dft) calculations were carried out for six-membered heterocyclic si-n aromatic rings. full geometry optimizations were performed in gas-phase, and at b3lyp level using 6-311++g(d,p) and cbsb7 basis ...

Journal: :international journal of nano dimension 0
s. rahimnejad 1department of chemistry, islamic azad university-shahre rey branch, tehran, iran. m. mirzaei department of chemistry, islamic azad university-lahijan branch, lahijan, iran.

density functional theory (dft) calculations were performed to investigate the properties of planar, tubular and conical forms of silicon nanostructures. the evaluated parameters including averaged bond lengths, binding energies, gap energies and dipole moments were then evaluated for the optimized models of study. the results indicated that the bond lengths between silicon atoms are different ...

Journal: :chemistry of solid materials 0
seyed javad mousavi

we have investigated the electronic structure and thermodynamic properties of supercell of the -al2o3 by first-principles calculation in framework of density functional theory (dft) and full potential linearized augmented plane wave (fp-lapw) with generalized gradient approximation (gga) and by quasi-harmonic debye model. our calculated value for direct band gap of α-al2o3 is 7.2 ev which is v...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم 1386

چکیده ندارد.

Journal: :journal of physical & theoretical chemistry 2010
mahmoud mirzaei

the electronic and structural properties of pristine and carbon doped (c-doped) boron nitride nano-ribbons(bnnrs) have been studied employing density functional theory (dft) calculations. total energies, gapenergies, dipole moments, and quadrupole coupling constants (qcc) have been calculated in the optimizedstructures of the investigated bnnrs. the results indicated that the stability and gap ...

Journal: :international journal of nano dimension 0
m. mirzaei laboratory of nano computations (lnc), department of nanotechnology, pharmaceutical sciences branch, islamic azad university, tehran, iran.

density functional theory (dft) calculations were performed to investigate the effects of a carbon nanotube (cnt) on the properties of the fluorouracil (f-uracil) anticancer drug. to achieve the purpose, a molecular model including both of f-uracil and cnt molecules was created to represent the cnt@f-uracil compound. the optimized parameters indicated that the new compound could show new proper...

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