Estudo da fotodecomposição de corantes xantenicos em matrizes de poli(vinil alcool)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

On this thesis the photobleaching reaction rates of some xanthene dyes dissolved on PVA matrices were studied. The photobleaching reaction of the polymer/dye system was monitored by the dye fluorescence emission. The influence of the sample temperature, dye concentration and the presence of oxidizers, reductors and triplet quenchers upon the reaction rates were analized. A spectrofluorimeter with temperature control capabilities was developed to the purposes of this thesis. After the global data analysis it was possible to elucidade several details of the photobleaching reaction mechanism.

ASSUNTO(S)

espectroscopia de fluorescencia fotoquimica decomposição quimica

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