Self‐Assembly of Polyoxometalate‐Supported Ln‐H nydroxo/Oxo Clusters with 1D Extended Structure: [LnIII(H2O)7Cr(OH)6Mo6O18]n·4nH2O (Ln = Ce,Sm, Eu) |
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| Authors: | Dong‐Mei Shi Feng‐Xia Ma Chun‐Jing Zhang Sheng Lu Ya‐Guang Chen Prof Dr |
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| Institution: | 1. Changchun / P. R. China, Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University;2. Jilin / P R China, Basic Science Department, Jilin Agricultural Science and Technology College;3. Dandong / P. R. China, College of Material Science and Chemistry Engineering, Eastern Liaoning University |
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| Abstract: | Three novel polyoxometalate compounds consisting of Anderson‐type anions and trivalent lanthanide cations, Ln(H2O)7Cr(OH)6Mo6O18]n·4nH2O (Ln = Ce 1 ; Sm 2 ; Eu 3 ), have been synthesized in aqueous solution and characterized by single crystal X‐ray diffraction, elemental analyses, IR spectra, and TG analyses. Single crystal X‐ray diffractions reveal that the structures of the 1:1 composite compound formed by the heteropolyanion Cr(OH)6Mo6O18]3? as the building unit and the Ln(H2O)7]3+ complex fragment as the linker, which exhibit a type of zig‐zag chain with alternating cations and anions through the Mo‐Ot′‐Ln‐Ot′‐Mo linkage in the crystal. The magnetic properties of 1 ? 3 have been studied by measuring their magnetic susceptibility over the temperature range of 2‐300 K. The UV‐vis spectra of 1 give the Mo‐O and CrIII‐O charge transfer transitions at 203 and 543 nm, respectively. In addition, the fluorescent characteristic transition of the Eu3+ ions in compound 3 is reported. |
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| Keywords: | Polyoxometalates Lanthanides Zig‐zag chains Supramolecular network |
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