Perturbation effect of solvent on the photo-physical processes of fluorescence solute at low temperature

مقدم أطروحة جامعية

al-Rawi, Asma Naji Ahmad

مشرف أطروحة جامعية

al-Wattar, Abbas Jasim Hammadi
al-Maliki, Firas Jawad K.

أعضاء اللجنة

Sadiq, Zaynab S.
Hadi, Mahasin Fadil
Hamid, Muhammad A.

الجامعة

جامعة بغداد

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفيزياء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2014

الملخص الإنجليزي

In the present work, the low temperature spectroscopy of Anthracene and Benzoanthracene molecules in different solvents has been studied at a fixed molar concentration.

The temperature range has been taken from room temperature down to liquid nitrogen temperature (77K).

Polar and nonpolar solvents; Ethanol, Isopropanol, Hexane, Heptane and Nonane, have been used in order to study the environment effect on the absorption and fluorescence spectra of these molecules.

On the other hand, some of the spectroscopic parameters have been determined as functions of solvent polarity and temperature.

Thus, the fluorescence lifetime has been measured using the Photon Technology International (PTI) instrument.

The results indicate that the band width at full half maximum (FWHM) increases, while the peak emission cross section (σp) decreases, with increasing of solvent polarity and temperature.

The Shpol'skii spectra of these molecules show clearly enhancement, in which sharp and highly- resolved fine structure spectra have been observed at 77K.

التخصصات الرئيسية

الفيزياء

عدد الصفحات

88

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-607235