Transferência de energia entre corantes catiônicos em sistemas homogêneos

• Autor(a) principal: Oliveira, Hueder Paulo Moisés de
• Data de Publicação: 2003
• Outros Autores: Machulek Junior, Amilcar, Legendre, Alexandre de Oliveira, Gehlen, Marcelo Henrique
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFMS
• Texto Completo: https://repositorio.ufms.br/handle/123456789/751; http://dx.doi.org/10.1590/S0100-40422003000400020
• topic: Transferência de Energia; Agentes Corantes; Fluorescência; Energy Transfer; Coloring Agents; Fluorescence

In this work, the energy transfer by dipole-dipole interaction between cationic dyes in n-alcohols (methanol, ethanol, 1-propanol and 1-butanol) is studied by time resolved and steady state fluorescence measurements. The critical radii of energy transfer were determined by three independent methods; the spectral overlap, fluorescence decay profiles, and relative intensity measurements. In all solvents, R0 values of the dye pairs obtained from spectral overlap were between 40 to 90 Å. Steady state and time resolved fluorescence measurements resulted in values of R0 in the range of 50 - 80 Å, with good correlation of values.