Photophysics Process
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Simulação da dinâmica do estado excitado em semicondutores orgânicos / Simulation of the excited state dynamics in organic semiconductors
In the present work, the Monte Carlo method and the direct numerical integration of the Master Equation were employed to simulate the excitation spectral diffusion process in light emitting polymeric systems. The methodology employed a competition among the internal intra-molecular relaxation, the inter-molecular incoherent energy transfer via Förster mecha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
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2. Re(I) complexes and TiO2 films in photoinduced molecular devices / Complexos de Re(I) e filmes de TiO2 em dispositivos moleculares fotoinduzidos
The thesis focus on two main topics: characterization of TiO2 films for Dye-sensitized solar cells, DSCs, and investigation on photochemical and photophysical properties of Re(I) polypyridyl complexes. Mesoporous TiO2 films were prepared by sol-gel method and by commercial oxide (P25, Degussa) and were characterized by XRD, SEM, B.E.T. and XPS. Both oxides w
Publicado em: 2009
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3. Estudo dos processos fotofísicos em heteroestruturas orgânicas que utilizam chaveamento de luz por fotoalinhamento molecular / Study of the photophysics process in organic heterostructures which utilize light switch by molecular alignment.
O presente trabalho tem o objetivo de estudar os processos fotofísicos em filmes automontados de poli( -fenileno vinileno), ou PPV, sintetizados e processados no Grupo de Polímeros Prof. Bernhard Gross (GPBG) do IFSC, através dos processos de transferência de energia para o azocromóforo BY ou dentro da própria cadeia do PPV, através de um gradiente en
Publicado em: 2006
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4. Photophysics of poly(p-phenylene vinylene) films
We report on time resolved photoluminescence (PLRT) measurements in poly(p-phenylene vinylene) (PPV) films irradiated by laser in the presence of air. We observe a PL intensity enhancement and a biexponential decay dynamics of PL signal for all irradiated films. These results can be understood in terms of a chain shortening process due to carbonyl incorporat
Brazilian Journal of Physics. Publicado em: 2004-06
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5. Desenvolvimento de sistemas polinucleares baseados em clusters trinucleares e complexos poliimínicos de rutênio: unidades de montagem em química supramolecular / Development of polynuclear systems based on trinuclear cluster and polyimines ruthenium compounds: building blocks in supramoleular chemistry
The aim of the work reported is to develop polynuclear structures based on trinuclear ruthenium clusters. All the oligomers are seen as interesting options to the future development of supramolecular devices, due to their photophysical and electrochemical properties. A series of mixed dimers and one trimer were obtained by the combination of the [Ru3O(CH3COO
Publicado em: 2002
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6. Estudo espectroscopico da fluoresceina em poli (alcool vinilico) e poli (acetato de vinila)
Using the eletronic absorption (UV/VIS) and fluorescence emission spectroscopies, it was studied the photophysics of fluorescein in several systems: (a) aqueous solutions at different pH s, (b) protic solvents (ethanol and ethylene glycol ), (c) poly (vinyl alcohol) (PVA), (d) aprotic solvents (ethy acetate, dioxane and acetone) and (e) poly (vinyl acetate)
Publicado em: 1989
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7. Identification of different emitting species in the red fluorescent protein DsRed by means of ensemble and single-molecule spectroscopy
The photophysics and photochemistry taking place in the DsRed protein, a recently cloned red fluorescent protein from a coral of the Discosoma genus, are investigated here by means of ensemble and single-molecule time-resolved detection and spectroscopic measurements. Ensemble time-resolved data reveal that 25% of the immature green chromophores are pre
The National Academy of Sciences.