Estudos sobre complexos de Európio em Filmes de Langmuir e Langmuir -Blodgett
Arquivos
Data
2022-11-21
Autores
Frare, Isadora Mangini 
Orientadores
Ceridório, Lucinéia Ferreira
Tipo
Trabalho de conclusão de curso
Título da Revista
ISSN da Revista
Título de Volume
Resumo
O objetivo desse trabalho foi estudar e reunir o conhecimento a respeito dos complexos de Európio em filmes de Langmuir e Langmuir Blodgett e apresentar o panorama desse contexto. O estudo foi dividido em duas etapas, a primeira consistiu na parte prática, experimentos para a formação de filmes de Langmuir com complexos de Európio e bases de Shift e a segunda realizar um levantamento bibliográfico qualitativo dos complexos de Eu(III) aplicados em filmes de Langmuir e Langmuir-Blodgett. O levantamento bibliográfico foi utilizado a partir da seleção de artigos obtidos base de dados internacional – Web of Science (WoS), publicados entre 2001 a 2021. Para a parte experimental foi verificado a solubilidade dos complexos em clorofórmio, realizado a análise espectroscópica de infravermelho (FTIR) e isotermas de pressão superficial em filmes de Langmuir. Com a análise de 12 artigos separados em categorias foi evidente que há uma diversidade de complexos de Eu empregados em filmes de Langmuir e LB e que a escolha do ligante tem fortes influencias tanto nas propriedades físico-química das monocamadas formadas (estabilidade e transferência), quanto nas propriedades de luminscência. A análise das espectroscopias FTIR do ligante e do complexo permitem confirmar a síntese dos complexos [Eu(Br2-salophen), [Eu-salophen] e [Eu(NO2)2-salophen)] e as curvas de presssão de superfície x área molecular dos filmes de Langmuir confirmam a formação desses complexos com a mistura de ácido esteárico.
The aim of this work was to study and gather knowledge about Europium complexes in films by Langmuir and Langmuir Blodgett and present an overview of this context. The study was divided into two stages, the first consisted of the practical part, experiments for the formation of Langmuir films with Europium complexes and Shift bases and the second carried out a qualitative bibliographical survey of the Eu(III) complexes applied in Langmuir and Langmuir-Blodgett. The bibliographic survey was used from the selection of articles obtained from the international database - Web of Science (WoS), published between 2001 and 2021. For the experimental part, the solubility of the complexes in chloroform was verified, an infrared spectroscopic analysis was performed (FTIR) and surface pressure isotherms in Langmuir films. With the analysis of 12 articles separated into categories, it was evident that there is a diversity of Eu complexes used in Langmuir and LB films and that the choice of ligand has strong influences both on the physicochemical properties of the formed monolayers (stability and transfer), and in the luminescence properties. The analysis of FTIR spectroscopies of the ligand and the complex allows confirming the synthesis of the complexes [Eu(Br2 salophen), [Eu-salophen] and [Eu(NO2)2-salophen)] and the surface pressure x molecular area curves of the Langmuir films confirm the formation of these complexes with the stearic acid mixture.
The aim of this work was to study and gather knowledge about Europium complexes in films by Langmuir and Langmuir Blodgett and present an overview of this context. The study was divided into two stages, the first consisted of the practical part, experiments for the formation of Langmuir films with Europium complexes and Shift bases and the second carried out a qualitative bibliographical survey of the Eu(III) complexes applied in Langmuir and Langmuir-Blodgett. The bibliographic survey was used from the selection of articles obtained from the international database - Web of Science (WoS), published between 2001 and 2021. For the experimental part, the solubility of the complexes in chloroform was verified, an infrared spectroscopic analysis was performed (FTIR) and surface pressure isotherms in Langmuir films. With the analysis of 12 articles separated into categories, it was evident that there is a diversity of Eu complexes used in Langmuir and LB films and that the choice of ligand has strong influences both on the physicochemical properties of the formed monolayers (stability and transfer), and in the luminescence properties. The analysis of FTIR spectroscopies of the ligand and the complex allows confirming the synthesis of the complexes [Eu(Br2 salophen), [Eu-salophen] and [Eu(NO2)2-salophen)] and the surface pressure x molecular area curves of the Langmuir films confirm the formation of these complexes with the stearic acid mixture.