Crystal Structure and Characterization of a Novel Neodymium Coordination Compound Based on Dawson Cluster
来源期刊：JOURNAL OF RARE EARTHS2004年第3期
论文作者：魏梅林 王敬平 牛景杨
Key words：polyoxometalates; coordination compound; structure elucidation; Keggin structure; rare earths;
Abstract: A new coordination compound, [{Nd(NMP)2(H2O)6Cl}{Nd(NMP)2(H2O)7}H (P2Mo18O62) (NMP=N-methyl-2-pyrrolidone) was synthesized and characterized by elemental analyses, IR spectrum, and X-ray single crystal structural analysis. The crystal structure indicates that the title compound belongs to monoclinic space group Cc, with unit cell dimensions a=2.4528(5) nm, b=1.9495(4) nm, c=2.4405(5) nm, β=109.94(3)°, Z=4, V=10.970 (4) nm3, Dc=2.262 g*cm-3, R1=0.0676, wR2=0.1441. The ESR spectrum of powder of the title compound at 110 K after being exposed to sunlight shows the signal of Mo5+, g=1.95. Cyclic voltammetry was measured in aqueous solution containing 0.1 mol*L-1 KCl as the supporting electrolyte and shows that the title compound undergoes two one-electron reversible reductions.
魏梅林1，王敬平1，牛景杨1
(1.School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China)
Abstract:A new coordination compound, [{Nd(NMP)2(H2O)6Cl}{Nd(NMP)2(H2O)7}H (P2Mo18O62) (NMP=N-methyl-2-pyrrolidone) was synthesized and characterized by elemental analyses, IR spectrum, and X-ray single crystal structural analysis. The crystal structure indicates that the title compound belongs to monoclinic space group Cc, with unit cell dimensions a=2.4528(5) nm, b=1.9495(4) nm, c=2.4405(5) nm, β=109.94(3)°, Z=4, V=10.970 (4) nm3, Dc=2.262 g*cm-3, R1=0.0676, wR2=0.1441. The ESR spectrum of powder of the title compound at 110 K after being exposed to sunlight shows the signal of Mo5+, g=1.95. Cyclic voltammetry was measured in aqueous solution containing 0.1 mol*L-1 KCl as the supporting electrolyte and shows that the title compound undergoes two one-electron reversible reductions.
Key words:polyoxometalates; coordination compound; structure elucidation; Keggin structure; rare earths;
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