Chirality and Magnetic Properties of One-dimensional Ln (Ln = Gd,Dy) Polymers |
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| Authors: | Ning-Fang Li Jiuyang Ji Wei Jiang Jia-Peng Cao Ye-Min Han Peng Yuan Yan Xu |
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| Institution: | 1. College of Chemical Engineering, State Key Laboratory of Materials-Oriented, Chemical Engineering, Nanjing Tech University, 211816 Nanjing, P. R. China;2. Teaching Affaires Office, Nanjing Tech University, 211816 Nanjing, P. R. China |
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| Abstract: | The usage of the achiral ligand, in lanthanide chemistry, successfully obtained two series of chiral lanthanide complexes, formulated d - and l -{GdIN]HIN]CH2OCH2O]}n (abbreviated as Gd ) and d - and l -{DyIN]HIN]CH2OCH2O]}n (abbreviated as Dy , HIN = isonicotinic acid). Crystallographic researches determined that four compounds are all one-dimensional (1D) chain structures and crystallized in a chiral space group. In addition, CH2OHCH2OH acts as not only solvent but also the bridge ligand. Besides, single crystal circular dichroism (CD) spectra conformed compounds Gd-L and Gd-D , Dy-L and Dy-D are enantiomers respectively. Magnetically, compound Gd showed predominant magnetocaloric effect (MCE) of 26.20 J · kg–1 · K–1 at 2.5 K for ΔH = 7 T, while there is ferromagnetic interactions in compound Dy . |
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| Keywords: | One-dimensional Lanthanides Chiral properties Magnetic property |
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