نتایج جستجو برای: hybrid density functional theory

تعداد نتایج: 1825331  

Journal: :physical chemistry research 0
hooriye yahyaei department of chemistry, zanjan branch, islamic azad university, zanjan, iran seyede negar mousavi department of nanochemistry, faculty of pharmaceutical chemistry, pharmaceutical sciences branch, islamic azad university ,tehran - iran (iaups )

in this research, we report the results of dft calculations using xc-hybrid functional, b3lyp and employ nbo interpretation to investigate the stereoelectronic effects. electrostatic and steric impacts on the conformational properties of 1,2-difluorodiazene (1), 1,2-dichlorodiazene (2) and 1,2-dibromodiazene (3) are also studied. factors determining the thermodynamically stable molecular struct...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه دانشهای بنیادی (مرکز تحقیقات فیزیک نظری و - پژوهشکده علوم نانو 1392

among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2014
ahmad irfan

ground state geometries have been computed using density functional theory (dft) at b3lyp/6-31g(d,p) level of theory. the excitation energies and spectroscopic parameters have been computed using long range corrected (lc) hybrid functional by time dependent density functional theory (tddft) with lc-blyp level of theory. the polarizable continuum model (pcm) has been used for evaluating bulk sol...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

2006
Chantal T. Falzon Feng Wang

Binding energy spectra and orbital momentum distributions of the two most stable conformers of L-alanine are investigated. Molecular properties such as geometry and dipole moments agree well with available experimental and previous theoretical investigations. Dual space analysis is employed to study the binding energy spectra in coordinate space based on B3LYP/TZVP density functional calculatio...

Ground state geometries have been computed using Density Functional Theory (DFT) at B3LYP/6-31G(d,p) level of theory. The excitation energies and spectroscopic parameters have been computed using Long range Corrected (LC) hybrid functional by Time Dependent Density Functional Theory (TDDFT) with LC-BLYP level of theory. The Polarizable Continuum Model (PC...

Journal: :journal of physical and theoretical chemistry 0
mohammad mahdi akbarzadeh building chemical engineering, setoodeh bana co., jomhori st., p.o. box 13187-63715, tehran, iran khirollah mehrani department of chemistry, ardabil branch, islamic azad university, p.o. box 56157-31567, ardabil, iran shahriar ghammamy faculty of sciences, science and research branch, islamic azad university, p.o. box 14778-93855, tehran, iran vahideh hadigheh rezvan department of chemistry, imam khomeini international university, p.o. box 34148 - 96818 qazvin, iran

compound (n,n-bis (salicylidene) 1,2-diaminophenylene) was prepared by condensation of ethanolsolution of 2-hydroxybanzaldehyde and 1,2-diaminophenylene. the compound was characterized by1h nmr, infrared spectroscopy (ft-ir) data and analytical data. the geometrical parameters andenergies have been obtained from density functional theory (dft) b3lyp method and hartree-fock (hf) method with 3-21...

Journal: :The Journal of Chemical Physics 2012

Compound (N,N-bis (salicylidene) 1,2-diaminophenylene) was prepared by condensation of ethanolsolution of 2-Hydroxybanzaldehyde and 1,2-diaminophenylene. The compound was characterized by1H NMR, infrared spectroscopy (FT-IR) data and analytical data. The geometrical parameters andenergies have been obtained from Density Functional Theory (DFT) B3LYP method and Hartree-Fock (HF) method with 3-21...

Journal: :nanomedicine research journal 0
amirali abbasi molecular simulation laboratory (msl), azarbaijan shahid madani university, tabriz, iran jaber jahanbin sardroodi molecular simulation laboratory (msl), azarbaijan shahid madani university, tabriz, iran

objective(s): adsorption of immucillin-a (bcx4430) molecule on the pristine and n-doped tio2 anatase nanoparticles were studied using the density functional theory (dft) calculations. the adsorption energy analysis indicated that tio2+immucillin-a complexes including oc-substituted tio2 have higher adsorption energy than the complexes with ot substituted tio2, thus providing more stable configu...

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