Banca de QUALIFICAÇÃO: CATHARINA BATISTA DE ARAÚJO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : CATHARINA BATISTA DE ARAÚJO
DATE: 25/04/2023
TIME: 14:00
LOCAL: Auditório do IF
TITLE:

THEORETICAL-EXPERIMENTAL STUDY OF THE ADDITION OF SOLVENTS ON THE SPECTROSCOPIC PROPERTIES OF ORGANIC MOLECULES

KEY WORDS:

PY-RES, Fluorescence, Spectroscopic Properties

PAGES: 103
BIG AREA: Ciências Exatas e da Terra
AREA: Física
SUMMARY:

Studies on the characterization of new molecules that exhibit fluorescence have gained prominence due to the growing demand for chemical sensors, biomarkers, photonic devices and bioimaging applications. The investigation of fluorescent molecules has the potential to improve the sensitivity, selectivity and efficiency of these systems, thus expanding possibilities in areas such as medical diagnosis and technological development. In this thesis, we performed a comprehensive analysis of the spectroscopic properties of the Py-res molecule in different solvents with different polarities. The objective of this work is to understand the relationship between the polarity of the solvent and the optical and structural properties of the Py-res molecule, in order to explore its potential applications in sensors and optical devices and to perform a characterization of this new monomer. We performed a series of experiments to investigate the absorption and emission characteristics of the molecule at different wavelengths and as a function of temperature. Through these experiments, we identified the dependencies of absorption and emission processes, as well as the relationship between fluorescence intensity and solvent polarity. Complementing the experimental approach, we employ computational simulations using Gaussian to analyze the electronic structure, energy levels and geometry of the molecule. The simulations allowed the identification of excited states and the investigation of electronic transitions.

BANKING MEMBERS:
Interno(a) - 2318874 - FRANCISCO ANACLETO BARROS FIDELIS DE MOURA
Presidente - 2621034 - MARIA SOCORRO SEIXAS PEREIRA
Externo(a) ao Programa - 1120709 - MARIA TEREZA DE ARAUJO