Influence of the matrix in the optical response of organic-inorganic hybrid materials doped with europium(III)

摘要: Eu3+-doped siloxane-oxide hybrid nanocomposites have been prepared by hydrolysis and condensation of diethoxydimethylsilane (DEDMS) different metallic alkoxides, M(OR)n with M = Ti, Zr, Al Ta. The luminescent properties Eu3+ used to study the environment rare earth ion within matrices. Emission spectra shows that surrounding varies matrix composition depends on nature metal introduced as cross-linking agent. In addition, decay curves performed they show lifetime values for each system. Among systems under investigation, one tantalum presents most anisotropic lowest coordination number ion, aluminium, which symmetrical surrounding, a small value, probably due tendency Al3+cation attract retain hydroxyl groups, responsible luminescence quenching.