أُجريت الحسابات النظرية باستخدام نظرية التابعية للكثافة و بالطريقتين نصف التقربية و initio-Ab
لمادة الصباغ الليـزري البـايرومثيين و المركبـات المرتبطـة بـه chromophore-PM, 4m-PM
.PM597, PM567, PM 650, PM546, أجرينا الحسابات النظرية باستخدام DFT, AM1, DFT- TD و CIS للسوية الأرضية و المثـارة الأولى لمواد صبغات ليزر منتقاة.
و حصلنا على الهندسة المثلى للجزيئات و طيف UV و IR و الانتقال بين السوية الأرضية S0 و المثارة
S1 فضلاً عن HOMO و LOMO و خواص أخرى.
Theoretical calculations using density functional theory (DFT) both on semi
empirical and Ab initio levels have been carried out for pyrromethene laser
dye and related compounds (PM-chromophore, PM-4m, PM 546, PM650 PM
567 and PM597). We carried out theoretical calculations using DFT, AM1, TDDFT
and CIS on ground and excited states for the selected laser dye materials,
we obtained the optimized geometry of the molecules, UV, IR spectrum, and
the transition between the ground S0 and the first excited S1 states exclusively,
the HOMO and LUMO states and other properties.
References used
Duarte, F. J. (1995). Tunable Lasers Handbook, Research Laboratories Rochester, New York
PhilHOlee. (2008). Synthesis of 4,4-Difluoro-4-bora-3a,4a-diaza-s-indacene Dyes Bearing New Aryl Substituents, Bull. Korean Chem. Soc, Vol. 29, No. 1 261
Bushmann, V., Weston, K. D., Sauer, M. (2003). Spectroscopic Study and Evaluation of Red, Absorbing Fluorescent Dyes, Bioconjugate Chem. 14, 195
In this work, theoretical calculation of the ground and excited state of
coumarin compounds are performed using DFT-B3LYP and CIS methods with
6-31G basis set. IR spectrum, UV/Vis spectrum, molecular orbitals and energy
gap are calculated. We use
We have used numerical methods to solve the Kohn-Sham equations of the
Density Functional Theory DFT, within local density approximation LDA
employing different pseudopotentials in order to obtain equilibrium structure
and properties of some mater
In this research, we studied the quantum effect of the electronic
density change effect of some sodium( Nan) clusters properties,
electronic and spectral properties changes.We have been studied
using density functional theory: (DFT/B3LYP(6-311+G(2d))).
Density Functional Theory (DFT) is a computational method that
derives properties of The sodium clusters (neutral and positively)
based on a determination of the electron density of the clusters.
Thirty-two patients with port-wine stain were included in this study. The 585 nm
pulsed dye laser treatment with an air cooling device was repeated 4 times at 8 – week
intervals with a setting of 0.5 ms pulse duration and an average energy fluence
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