دراسة عملية ونظرية لمستويات الطاقة الالكترونية و التذبذبية لبعض الأوساط الفعالة لليزرات الصبغة

الموضوعات

علوم تطبيقية وتكنولوجية

روابط وملفات

التعريف والنوع

رقم الوثيقة

06312aab-ae64-4bbf-8d1d-a33b8e021f9a

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

998089_1.pdf

بيانات النشر

ترجمة العنوان

The study of practical and theoretical levels Electronic and vibrational energy to some active media for dye

ألقاب المؤلفين

[{"name_ar":"جبار حسين إبراهيم","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"لازم حسن عبود","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"منى لطيف حمد","title_ar":"اعداد","title_en":"Preparation"}]

اللغة

Arabic

المصدر والدورية

اسم المصدر

دراسة عملية ونظرية لمستويات الطاقة الالكترونية و التذبذبية لبعض الأوساط الفعالة لليزرات الصبغة

المحتوى والصفحات

عدد الصفحات

0

ترجمة الملخص

This research included the practical and theoretical study, as follows: - The study of the energy levels of molecular vibrational experimentally and theoretically, and in the study process measured vibration modes for solution two dye (Pop-Pop + Chloroform) and (Acridine Orange + ethanol) and the calculation of the intensity of absorption and the wave number of the infrared spectrum Central (MID-IR) using infrared spectrometer F.T.I.R. As for theoretically, the fundamental vibrational modes of Acridine Orange dye were calculated and diagnosed, and their intensity as well as wave numbers using a program (Gaussian 09) from these modes: C–H str., C–H ben., C–O ben., C=C str., C=N str. From the above results, it was noticed that there's a mismatch between practical and theoretical results of vibrational modes with a relative difference between the intensities measured practically and theoretically. In the second part, the electronic energy levels of molecules were studied experimentally and theoretically. The study was conducted using different solvents to know the effect of the solvent type and the different concentrations (0.5×10⁻³, 1×10⁻³, 0.5×10⁻⁴, 1×10⁻⁴, 1×10⁻⁵) M for Pop-Pop dye with Chloroform and Toluene solvent, and Acridine Orange dye with ethanol solvent. On the other hand, the absorption, fluorescence spectra, linear optical properties (absorption coefficient, refractive index, lifetime, and quantum yield of fluorescence level) were studied. Ranged wavelengths of the absorption spectra for Pop-Pop solutions between (352-337) nm in Chloroform and (343-337) nm for the first peak and (358-355) nm for Toluene the second peak. In the Acridine Orange solutions, wavelengths ranged between (490-478) nm in ethanol. All these wavelengths within the transitions in molecular electrical orbits of type (n→π*). The results showed shifted absorption spectrum and emission (fluorescence) spectra peaks toward shorter wavelengths (blue shift), increase in the value of linear absorption coefficients and linear refractive index when increasing the concentration of the solution. The results show that the lifetime of fluorescence increases, quantum yield decreases with increasing concentration of the solution. By using a program (Gaussian View 0.5), the molecular electrical orbits were drawn theoretically of Acridine Orange dye, and diagnosed (n, σ, σ*, π, π*) orbits, which recorded a match, which was a transition of type (n→π*). Theoretically, using a program (Gaussian 09), the energy of the levels (HOMO, LUMO) were studied, the energy (8.451 eV) and (0.1306 eV) respectively, as well as energy gap (Eg = 8.451 eV) has been calculated.

كلمات الباحثين

مستويات الطاقة الجزيئية، الاهتزازات الجزيئية، الطيف تحت الأحمر، مطيافية F.T.I.R، برنامج Gaussian 09، Acridine Orange، Pop-Pop، الامتصاص الخطي، الانبعاث الضوئي، معدل الكم

إشراف وإعداد

الإشراف

جبار حسين إبراهيم, لازم حسن عبود

الإعداد

منى لطيف حمد

الاقتباسات الببليوغرافية