Transferência de energia entre corantes catiônicos em sistemas homogêneos

Química Nova

Hueder Paulo Moisés De Oliveira¹  Amilcar Machulek Junior¹  Alexandre De Oliveira Legendre¹  Marcelo Henrique Gehlen¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos São Carlos SP

关键词: dyes;    fluorescence;    energy transfer;   

DOI  :  10.1590/S0100-40422003000400020

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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