Dy, Tb, Gd and Eu complexes with low melting point and magnetic behavior

作者：Pereira Claudia C L^*; Coutinho Joana T; Pereira Laura C J; Leal Joao Paulo; Laia Cesar A T; Monteiro Bernardo

来源：Polyhedron, 2015, 91: 42-46.

DOI：10.1016/j.poly.2015.02.026

• Solid state polymorphism
• Lanthanides
• Magnetism
• Ionic liquids
• Solvatochromism

Three new complexes based on lanthanide(III) tetralds(beta-diketonate) with a tetraalkylphosphonium as counterion [P-6,P-6,P-6,P-14][Ln(NTA)(4)] (Ln = Dy (1), Tb (2), Gd (3); NTA = naphthoyltrifluoroacetone; P-6,P-6,P-6,P-14 = trihexyl(tetradecyl)phosphonium) were synthesized. The complexes were fully characterized and their spectroscopic, thermal and magnetic properties were evaluated, together with the Eu (4) analogue. The Dy (1) compound showed solvatochromic properties, the Tb (2) compound presented an unprecedented solid state polymorphism never observed in an organometallic compound and all complexes presented paramagnetic behavior with no interactions between the magnetic moments.

• 出版日期2015-5-8