Journal
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
Volume 221, Issue 7, Pages 941-948Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1524/zpch.2007.221.7.941
Keywords
xanthene dyes; fluorescence quenching; TiO2
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The fluorescence quenching of xanthene dyes by TiO2 has been investigated using steady state technique. The dyes used are eosin, rhodamine B, rhodamine 6G. The quenching was found to obey Stern-Volmer equation and the corresponding Stern-Volmer plots were linear in the range of quencher concentration used [0-5 x 10(-5)] M. The quenching rate constant (k(q)) is in the range of 0.77-8.30 x 10(12) M-1 s(-1). This study reveals effective quenching of xanthene dyes with TiO2. The quenching of xanthene dyes followed electron transfer mechanism.
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