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Synthesis and magnetism of rare earth (Nd, Gd, Dy, Ho, Er, Y) pentafluoropropionate binuclear complexes with 2‐(4'‐methoxy‐phenyl)‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide
Author(s) -
Jiang ZongHui,
Zhang Wei,
Liao DaiZheng,
Huan ZhenWei,
Sun BaiWang,
Wang GengLin
Publication year - 1995
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19950130507
Subject(s) - chemistry , magnetism , magnetic susceptibility , oxide , rare earth , gadolinium , octahedron , crystallography , ferromagnetism , inorganic chemistry , condensed matter physics , crystal structure , mineralogy , physics , organic chemistry
Six compounds of the general formula [Ln(pfpr) 3 ] 2 (NITPhOMe)·nH 2 O, where LnNd, Gd, Dy, Ho, Er, Y, pfpr=pentafluoropropionate, NITPhOMe=2‐(4'‐methoxyphenyl)‐4,4,5, 5‐tetra‐methylimidazoline‐1‐oxyl‐3‐oxide, and n =4 (for Nd, Dy, Er); 3 (for Gd); 6 (for Ho); 5 (for Y), have been synthesized. These complexes were characterized by elemental analyses, IR, electronic spectra and molar conductances. The variable temperature (4–300 K) magnetic susceptibility of the complex [Gd(pfpr) 3 ] 2 (NITPhOMe)·3H 2 O was determined. The observed susceptibility data were fit to those from theoretical magnetic equation by least‐squares method. The exchange integral, J , was found to be equal to 2.14 cm −1 . This indicates a weak ferromagnetic spin‐exchange interaction between the radical and the gadolinium(III) ion.