Photoluminescence studies on europium-based scorpionate-complex

The neutral homoleptic europium(III) complex Eu(Tp)(3) (Tp = hydrotris(pyrazol-1-yl)borate) showed luminescence associated to f-f transitions if irradiated with near-ultraviolet radiation having wavelength lower than 380 nm. In this species the most intense emission corresponds to the D-5(0) -> F-7(4) transition, falling between 690 and 700 nm. The complex is stable towards oxygen, moisture and near-UV light. The energy levels of the coordinated ligands involved in the photoluminescence process were computed by applying computational methods and by carrying out luminescence measurements on the analogous Gd(III) complex. (C) 2011 Elsevier B.V. All rights reserved.