STUDIES ON FERROM AGNETIC COUPLING COMPLEXES OF  LANTHANIDES WITH NITRONYL NITROXIDES

Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (4): 701-704.

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STUDIES ON FERROM AGNETIC COUPLING COMPLEXES OF LANTHANIDES WITH NITRONYL NITROXIDES

Received:1999-08-25 Revised:1999-08-25 Online:1999-08-25 Published:2009-10-10

Abstract

Abstract: Five novelcomplexesofformula 〔Ln( pfpr)3〕2 NITRS·nH2 O, where Ln = Nd, Sm , Eu, Gd, Dy; pfpr= pentafluoropropionate; NITRS= 2 - (2’- thienyl) - 4,4 ,5 ,5 te tramethylimidazoline 1 oxyl 3 oxide, and n= 6(for Nd);4(for Eu and Gd) ;2(for Sm and Dy), have been synthesized. Thesecomplexes werecharacterized by elemental analysis, IR, electronicspectra and EPR. Thevariabletemperature(2 300 K) magneticsusceptibility ofthecomplex 〔Gd(pfpr)3〕2 NITRS·4 H2 Owas determined and discussed. Theexchange integral,J= 0 44 cm 1 , wasfoundtobepositive,indicating a weakferromagneticspin ex changeinteraction between theradicaland Gd(III) ion.

Key words: ferromagnetism , Lanthanideion, nitronylnitroxide, complex

Z.Wang1) , Q.H.Zhao2) , D.Z.Liao2) , Z.H.Jiang1) , S.P.Yana and G.L.Wang1) 1) Department of Chemistry, Nankai University ,Tianjin 300071 ,China. 2) State Key Laboratory Coordination Chemistry, Nanjing University, Nanjing 210008 ,China. STUDIES ON FERROM AGNETIC COUPLING COMPLEXES OF LANTHANIDES WITH NITRONYL NITROXIDES[J]. Acta Metallurgica Sinica (English Letters), 1999, 12(4): 701-704.

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STUDIES ON FERROM AGNETIC COUPLING COMPLEXES OF LANTHANIDES WITH NITRONYL NITROXIDES

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