On the quenching of trivalent terbium luminescence by ligand low lying triplet state energy and the role of the 7F5 level: the [Tb(tta)3 (H2O)2] case - Souza, A. S.; Nunes, Luiz Antônio de Oliveira; Felinto, Maria Claudia França da Cunha; Brito, Hermi Felinto de; Malta, Oscar L (Journal of Luminescence, 2015)