Jamshid Najafpour
Department of Chemistry, Faculty of Science, Yadegar-e-Imam Khomeni (RAH) Shahre Rey Branch, Islamic Azad University, P.O. Box 18155-144 Tehran, I.R. IRAN
[ 1 ] - Modulating Band Gap and HOCO/LUCO Energy of Boron-Nitride Nanotubes under a Uniform External Electric Field
In this study, spectroscopic properties of the single-walled boron-nitride nanotube (SWBNNT) –a semiconductor channel in molecular diodes and molecular transistors–have been investigated under field-free and various applied electric fields by first principle methods.Our analysis shows that increasing the electric field in boron-nitride nanotube (BNNT) decreases the Highest Occupied Crystal Orbi...
[ 2 ] - The Conformational Effect of 6-Mono-Substituted and 6,7-Di-Substituted Derivatives of 5,6,7,8-Tetrahydrodibenzo[a,c]cyclo-octene on 13C Chemical Shift
Hartree-Fock (HF) and Density Functional Theory (DFT) methods employed to study the effect of conformational change on the 13C chemical shifts of 6-mono axial and equatorial substituted and 6,7-di axial-axial, equatorial-equatorial and axial-equatorial substitutedderivatives of 5,6,7,8-tetrahydrodibenzo[a,c]cyclo-octene. The geometry of the conformers have been optimized...
[ 3 ] - The Structure and Chemical Bond of FOX-7: The AIM Analysis and Vibrational Normal Modes
FOX-7 (1,1-diamino-2,2-dinitroethylene) recently is expected as a relatively new energetic material with high-performance and low sensitivity. The RHF and MP2 levels and DFT method with B3LYP functional with aug-cc-pVDZ basis set have been used for obtaining equilibrium geometry and Rho function (electron density distribution). By the aid of fundamental physical theorems implemented in the ...
[ 4 ] - Structure-Activity Relationship of Imidazobenzodiazepines, an AM1 Semi-Empirical Quantum Mechanics Study
Conformations and electronic properties of a series of imidazobenzodiazepines are investigated by AM1 semi-empirical quantum mechanics method. It is shown that substitution of Cl in position 7 instead of 8, changes the geometry of the seven membered lactam ring; this may put the N5 nitrogen in a better positon to act as a hydrogen bond acceptor, and the phenyl ring in position 6 is probably...
[ 5 ] - Theoretical Investigation of Hyper-coordinate Planar Si Clusters in [SiMnHn]q (M = Cu, Ni and n = 4, 5, 6)
In this study, the geometries of the [SiNinHn]q and [SiCunHn]q clusters, (n = 4,5,6 and q = 0,+1,-1) complexes have been optimized to form complexes with four, five and six planar and nonplanarsubstituents, with negative, neutral or positive atomic charge, using Density FunctionalTheory (DFT) at B3LYP/6-311+G (3df, p) computational level and then their thermodynamicstability were investigated b...
[ 6 ] - تغییر انرژی اتم ها در ایزومریزاسیون FOX-7
در این پژوهش انرژی اتم ها در ایزومریزاسیون مولکول1و1 دی آمینو2و2- دی نیترو اتنFOX-7 به ایزومر نیتریت و ایزومر ناشی از انتقال درون ملکولی هیدروژن به روش نظریه تابعی چگالی (DFT) در سطح محاسباتی مکانیک کوانتومی B3 LYP/aug-cc-pVDZ مورد بررسی قرار گرفت. با مطالعه انرژی اتم ها به کمک نظریه کوانتومی اتم ...
نویسندگان همکار