Influência de diferentes sistemas de solvente água-etanol sobre as propriedades físico-químicas e espectroscópicas dos compostos macrocíclicos feofitina e clorofila α

Química Nova

Leonardo M. Moreira²  Máira R. Rodrigues²  Hueder P. M. De Oliveira²  Adriana Lima¹  Rafael R. S. Soares¹  Vagner R. Batistela¹  Adriana P. Gerola¹  Noboru Hioka¹  Divinomar Severino¹  Mauricio S. Baptista¹  Antônio Eduardo Da Hora Machado¹ 

[1] ,Universidade Camilo Castelo BrancoSão Jose dos Campos SP ,Brasil

关键词: chlorophyll α;    pheophytin;    aggregation;   

DOI  :  10.1590/S0100-40422010000200005

来源: SciELO

【 摘 要 】

This work focus on the influence of solvent on the photophysical properties of chlorophyll α and pheophytin. Both compounds are related to the photosynthesis process and are considered prototypes of photosensitizers in Photodynamic Therapy. Fluorescence measurements were developed using water/ethanol mixtures at different compositions, since both solvents could be employed in biological applications. The spectroscopic properties of these compounds undergo profound changes depending on water content in the ethanol due to auto-aggregation processes. The major hydrophobicity and the lower dielectric constant of ethanol when compared with water precluded significantly the auto-aggregation process of these compounds.

【 授权许可】

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