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Journal of Thermal Analysis and Calorimetry
Authors: Crislene Morais, C. Gameiro, P. Santa-Cruz, S. Alves Jr, L. Soledade, and A. Souza

Abstract  

The complexes of general formula Ln(btfa)3L, where Ln=Eu or Tb, btfa=4,4,4-trifluoro-1-phenyl-1,3-butanedione, L=1,10-phenanthroline (phen) or 2,2-bipyridine (bipy), were synthesized by reacting the corresponding metal chloride with the proper β-diketone and the other ligand. The complexes were obtained in the powder form and were characterized by photoluminescence and TG. Their thermal decomposition was studied by non-isothermal thermogravimetric techniques. The Eu(btfa)3bipy complex presented the highest thermal stability and it melts before being decomposed. The complex Eu(btfa)3phen presented the largest activation energy for a heating rate of 5C min–1.

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Journal of Thermal Analysis and Calorimetry
Authors: J. C. D'Ars de Figueiredo Jr., V. M. De Bellis, M. I. Yoshida, V. Freitas Cunha Lins, and L. A. Cruz Souza
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