Energy transfer characteristics of the hydrogen peroxide induced Ce3+-Ce4+mixture

Luminescence of Ce3+ in the hydrogen peroxide induced sulfuric acid solutio ns was observed to be quenched by Ce4+ ions in the solution by energy trans fer due to electric dipole interaction between Ce3+ and Ce4+. A systematic investigation of the energy transfer characteristics of Ce3+-Ce4+ mixture h as been made by measuring the absorption, luminescence and excitation spect ra at room temperature. The effect, of the concentration of Ce3+ on the ene rgy transfer process has been also studied and the critical transfer distan ce (R-o) has been calculated considering Forster type interaction between t he ions and found to be 8.7 Angstrom for the mixture of 1 x 10(-4) mol l(-1 ) Ce3+ and 3 x 10(-4) mol l(-1) Ce4+. (C) 2000 Elsevier Science B.V. All ri ghts reserved.