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A. Kathiravan, V. Anbazhagan, M. Asha Jhonsi, R. Renganathan

Fluorescence Quenching of Xanthene Dyes by TiO₂

Keywords: Xanthene Dyes, Fluorescence Quenching, TiO2

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 × 10^-5] M. The quenching rate constant (k_q) is in the range of 0.77–8.30 × 10¹² M^-1 s^-1. This study reveals effective quenching of xanthene dyes with TiO₂. The quenching of xanthene dyes followed electron transfer mechanism.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 221, 07/2007
Pages: 941 - 948

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