Synthesis, crystalline structure and photoluminescence investigations of the new trivalent rare earth complexes (Sm3+, Eu3+ and Tb3+) containing 2-thiophenecarboxylate as sensitizer - Teotonio, Ercules Epaminondas Sousa; Felinto, Maria Claudia França da Cunha; Brito, Hermi Felinto de; Malta, Oscar Loureiro; Trindade, Antonio Carlos; Najjar, Renato; Strek, Wieslaw (Inorganica Chimica Acta, 2004)