On the quenching of trivalent terbium luminescence ligante low lying triplet state energy: the [Tb(tta)3 2H2O] case - Souza, A. S.; Nunes, Luiz Antônio de Oliveira; Felinto, Maria Claudia França da Cunha; Brito, Hermi Felinto de; Malta, O. L. (International Conference on Luminescence and Optical Spectroscopy of Condensed Matter - ICL, 2014)