Incorporation of the Eu(tta)(3)(H2O)(2) complex into a co-condensed d-U(600)/d-U(900) matrix

abstract

The thermal behavior, structure and photoluminescence features of an innovative organic/inorganic hybrid matrix built from the co-condensation of two di-ureasils frameworks (d-U(900) and d-U(600)), one of which incorporates poly(oxyethylene) (POE) chains with about 15.5 repeat units and the other about 8.5 oxyethylene repeat units are reported. The co-condensed di-ureasil network has been doped with the Eu(tta)(3)(H2O)(2) (where tta(-) is 2-thenoyltrifluoracetonate) complex. The effective interaction between the lanthanide ions and the host hybrid structure accounts for the increase of the emission overall quantum yield (36%) and for the D-5(0) quantum efficiency (57%) with respect to those of the complex alone (29% and 27%, respectively). (c) 2007 Elsevier B.V. All rights reserved.

keywords

ORGANIC-INORGANIC HYBRIDS; EUROPIUM COMPLEXES; ENERGY-TRANSFER; EPOXY-RESIN; LUMINESCENCE; EMISSION; IONS; TEMPERATURE; MECHANISMS; INTENSITY

subject category

Optics

authors

Fernandes, M; Bermudez, VD; Ferreira, RAS; Carlos, LD; Martins, NV

our authors

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