Comparative magnetic studies of (Sm, Nd) trichloroacetates and their heteronuclear CuLn2(CCl3COO)8.6H2O systems: structure and spectroscopy of a new type of Eu trichloroacetate
作者： W. Wojciechowski , J. Legendziewicz , M. Puchalska , Z. Ciunik
DOI: 10.1016/J.JALLCOM.2004.03.056
关键词:
摘要: Two series of compounds: heteronuclear CuLn2(CCl3COO)8·6H2O (Ln = Nd and Sm) their simple analogues Ln(CCl3COO)3·2H2O Eu, Nd, were synthesized. New Eu(III) trichloroacetate; Eu(CCl3COO)3·3H2O·CH3OH was obtained, its molecular structure determined by X-ray diffraction compared with the data respective systems reported earlier. Magnetization measured susceptibility derived in limit low field. Magnetic susceptibilities calculated discussed for homo- hetero-nuclear chloroacetates. Untypical hysteresis found (two loops) samarium trichloroacetate. This phenomenon is most probably effect flops spins magnetic fields 30,000 Oe very weak (if any) interaction intermediated hydrogen bonding between chains. A similar behavior observed neodymium carboxylate where ordering as a result Nd–Nd at temperature (1.6 K). For this system, moment depends on magnitude field ferromagnetic appears temperatures. The strongest interactions coupled ions antiferromagnetic TN=6.5 K CuSm2(CCl3COO)8·6H2O single crystals. Heisenberg model applied calculations three interacting located linearly. following relation derived: and exchange integrals. Mechanism basis obtained results.
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sci-hub.se 参考文章(33)
Edward A. Boudreaux, L. N. Mulay, Theory and applications of molecular diamagnetism ,(1976)
Marius Andruh, Isabelle Ramade, Epiphane Codjovi, Olivier Guillou, Olivier Kahn, Jean Christian Trombe, Crystal structure and magnetic properties of [Ln2Cu4] hexanuclear clusters (where Ln = trivalent lanthanide). Mechanism of the gadolinium(III)-copper(II) magnetic interaction Journal of the American Chemical Society. ,vol. 115, pp. 1822- 1829 ,(1993) , 10.1021/JA00058A029
J Legendziewicz, M Borzechowska, Heteronuclear Eu:Cu trichloroacetate and its polynuclear Eu analogue; their spectroscopy and magnetism Journal of Alloys and Compounds. ,vol. 300, pp. 353- 359 ,(2000) , 10.1016/S0925-8388(99)00765-3
Olivier Guillou, Pierre Bergerat, Olivier Kahn, Evangelos Bakalbassis, Kamal Boubekeur, Patrick Batail, Maurice Guillot, Ferromagnetically coupled gadolinium(III)copper(II) molecular material Inorganic Chemistry. ,vol. 31, pp. 110- 114 ,(1992) , 10.1021/IC00027A021
Marius Andruh, Evangelos Bakalbassis, Olivier Kahn, Jean Christian Trombe, Pierre Porcher, Structure and spectroscopic and magnetic properties of rare earth metal(III) derivatives with the 2-formyl-4-methyl-6-(N-(2-pyridylethyl)formimidoyl)phenol ligand Inorganic Chemistry. ,vol. 32, pp. 1616- 1622 ,(1993) , 10.1021/IC00061A017
Yu. V. Yablokov, V. K. Voronkova, J. Legendziewicz, E. Huskowska, G. Oczko, M. Borzechowska, Formation of correlated spin systems in one- and two-dimensional copper and lanthanide compounds Applied Magnetic Resonance. ,vol. 18, pp. 165- 176 ,(2000) , 10.1007/BF03162108
Grażyna Oczko, Janina Legendziewicz, Jerzy Mroziński, Gerd Meyer, Comparative spectroscopic and magnetic studies of two types of Ln and Ln:Cu trichloroacetates Journal of Alloys and Compounds. ,vol. 275-277, pp. 219- 224 ,(1998) , 10.1016/S0925-8388(98)00307-7
A. Bencini, C. Benelli, A. Caneschi, Richard L. Carlin, A. Dei, D. Gatteschi, Crystal and molecular structure of and magnetic coupling in two complexes containing gadolinium(III) and copper(II) ions Journal of the American Chemical Society. ,vol. 107, pp. 8128- 8136 ,(1985) , 10.1021/JA00312A054
Cristiano Benelli, Andrea Caneschi, Dante Gatteschi, Olivier Guillou, Luca Pardi, Synthesis, crystal structure, and magnetic properties of tetranuclear complexes containing exchange-coupled dilanthanide-dicopper(lanthanide = gadolinium, dysprosium) species Inorganic Chemistry. ,vol. 29, pp. 1750- 1755 ,(1990) , 10.1021/IC00334A031
Janina Legendziewicz, Magorzata Borzechowska, Graźyna Oczko, Gerd Meyer, Spectroscopy and magnetism of polymeric Ln(CCl3COO)3·2 H2O and their heteronuclear Ln2Cu(CCl3COO)8·6 H2O analogues (Ln=Sm, Gd) New Journal of Chemistry. ,vol. 24, pp. 53- 59 ,(2000) , 10.1039/A905956C