Energy transfer study of europium-tetracycline complexes

The aim of this work was to study the energy transfer mechanisms from the ligand to the central lanthanide ion of tetracycline-europium (Tc-Eu) complex. The absorption spectra of a EuCl3.H2O solution was measured and absorption cross-section of Eu3+ was estimated. The observed overlap predicts a resonant energy transfer from Tetracycline to Eu3+. The microscopic parameter of energy transfer was obtained using the overlap integral calculation considering a dipole-dipole energy transfer mechanism and results were compared considering an energy transfer by exchange. In this work, we report also the optical properties of Tc-Eu complex when urea hydrogen peroxide is added to the aqueous solution