A series of inorganic-organic hybrid compounds constructed from bis(undecatungstophosphate) lanthanates and copper-organic units |
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| Authors: | Dong-Ying Du |
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| Institution: | Institute of Functional Material Chemistry, Key Lab of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun 130024, PR China |
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| Abstract: | A series of inorganic-organic hybrid compounds built from bis(undecatungstophosphate) lanthanates and copper-complexes, namely, H8Cu(en)2H2O]4Cu(en)2]{Cu(en)2]La(PW11O39)2]}2·18H2O (1), H6Na2(en)2(H2O)5]Cu(en)2H2O]4Cu(en)2]{Cu(en)2]Ce(PW11O39)2]}2·16H2O (2), H6Na2(en)2(H2O)5]Cu(en)2H2O]4Cu(en)2]{Cu(en)2]Pr(PW11O39)2]}2·18H2O (3), H6Na2(en)2(H2O)4]Cu(en)2H2O]4Cu(en)2]{Cu(en)2]Nd(PW11O39)2]}2·14H2O (4), H6Na2(en)2(H2O)5]Cu(en)2H2O]4Cu(en)2]{Cu(en)2]Sm(PW11O39)2]}2·20H2O (5), and H7Cu(en)2]2Sm(PW11O39)2]·10H2O (6) (where en = 1,2-ethylenediamine), have been prepared. In these compounds, two lacunary PW11O39]7− anions sandwich an eight-coordinated Ln(III) cation to yield Ln(PW11O39)2]11− anion in a twisted square anti-prismatic geometry, which is further bridged by Cu(en)2]2+ fragments to generate a 1D zigzag-like chain. In 1-6, the coordination bond interactions and weak interactions between adjacent 1D chains play an important role in the zigzagging distances and angles of different 1D chains. The magnetic studies indicate that antiferromagnetic interactions exist in compounds 1, 2 and 4. |
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| Keywords: | Polyoxometalate Lanthanide Magnetic property Copper |
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