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Doctoral Thesis
DOI
Document
Author
Full name
Juan Sebastian Aguirre Araque
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2019
Supervisor
Committee
Toma, Henrique Eisi (President)
Azzellini, Gianluca Camillo
Bagatin, Izilda Aparecida
Winnischofer, Herbert
Title in English
Development of supramolecular metal-organic type systems and nanotechnology applications
Keywords in English
Intervalence charge transfer
Nanocomposites
Ruthenium polypiridin complexes
Supramolecular porphyrins
Abstract in English
Polypyridine ruthenium complexes have attracted attention due to their remarkable photoelectronic properties and being employed as electron injection compounds in DSSCs, photo catalysts in water splitting among others. The first two chapters of this thesis present a comprehensive study of two novel ruthenium polypyridine and pyridine based complexes for DSSCs and for the study of an outer sphere intervalence electron transfer respectively. Porphyrins are organic structures commonly found in nature. Their outstanding chemical versatility, structural and electronic properties have made these compounds object of continuous research. Among these properties are enzymatic catalysis, transport and photoelectron generation. For these reasons the last two chapters of this thesis tried to focus in the development of supramolecular porphyrin arrangements capable of exploit and generate a synergistic effect of metallated cobalt porphyrins and polypyridine ruthenium complexes with opposite electronic properties -depending upon their - accepting or donating nature- and their interaction with GO as nanocomposites for effective tetraelectronic dioxygen reduction and isoniazid oxidation. These catalytic studies showed promising results as possible sensors for dioxygen and isoniazid when compared with reported methodologies.
Title in Portuguese
Desenvolvimento de sistemas metal-orgânicos e suas aplicações nanotecnológicas
Keywords in Portuguese
Complexos polipiridínicos de ruténio
Intervalencia
Nanocompositos
Porfirinas supramoleculares
Abstract in Portuguese
Os complexos polipiridínicos de rutênio têm atraído muita atenção devido às suas notáveis propriedades foto eletrônicas, os quais têm sido empregados como compostos injetores de elétrons em DSSCs, fotocatalisadores na oxidação de água entre outros. Os dois primeiros capítulos desta tese apresentam um estudo abrangente de dois novos complexos polipiridínicos e piridínicos de rutênio para DSSCs e no estudo de uma transferência eletrônica de intervalência de esfera externa respetivamente. As porfirinas são estruturas orgânicas comumente encontradas na natureza. Sua excelente versatilidade química, propriedades estruturais e eletrônicas fizeram desses compostos objeto de intensa pesquisa. Entre essas propriedades estão a catálise enzimática, transporte e geração de fotoelétrons. Por estas razões, os dois últimos capítulos desta tese tentaram se concentrar no desenvolvimento de arranjos porfirínicos supramoleculares capazes de explorar e gerar um efeito sinérgico entre porfirinas de cobalto e complexos polipiridínicos de rutênio com propriedade eletrônicas opostas -dependendo da natureza -aceptor ou doador- e sua interação com GO como nano compósitos para a efetiva redução tetra eletrônica de oxigênio e oxidação de isoniazida. Os estudos catalíticos mostraramresultados promissores como possíveis sensores para oxigênio e isoniazida quando comparados com metodologias na literatura.
 
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Publishing Date
2019-08-20
 
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