de Figueiredo, A. T.Longo, V. M. [UNESP]da Silva, R. O. [UNESP]Mastelaro, V. R.Mesquita, A.Franco, R. W. A.Varela, José Arana [UNESP]Longo, Elson [UNESP]2014-05-202014-05-202012-08-20Chemical Physics Letters. Amsterdam: Elsevier B.V., v. 544, p. 43-48, 2012.0009-2614http://hdl.handle.net/11449/25554In this work, CaTiO3:Sm (CT:Sm) were prepared by a soft chemical processing at different annealing temperatures starting with a disordered structure and reaching an ordered one, with the propose to understand the relationship between structural order-disorder and photoluminescence emission. The samples were characterized by titanium K-edge, Titanium L-II and L-III-edge XANES, electron paramagnetic resonance (EPR) and photoluminescence (PL) measurements. XANES results clearly point the presence of local distortion in [TiO6] octahedral clusters until the crystallization was completed. The interactions of the network clusters that form the CT:Sm structures provides favorable structural and electronic conditions for the appearance of PL phenomena. (C) 2012 Published by Elsevier B.V.43-48engArtigo10.1016/j.cplett.2012.06.027WOS:000307879100009Acesso restrito