Integration of Ln-Sandwich POMs into Molecular Porous Systems Leading to Self-Assembly of Metal–POM Framework Materials

Authors

  • Shuang Yao,

    1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
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  • Jing-Hui Yan,

    1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
    2. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • Hui Duan,

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • Zhi-Ming Zhang,

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • Yang-Guang Li,

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • Xin-Bao Han,

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • Jian-Qiang Shen,

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • Hai Fu,

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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  • En-Bo Wang

    1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun 130024, China
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Abstract

Reactions of lacunary polyoxometalate (POM), transition-metal (TM), and lanthanide-metal (Ln) cations with the assistance of additional small organic molecules under hydrothermal conditions led to the formation of a group of metal–POM frameworks (MPFs) with nanospaces: [Cu(enMe)2]13{Ln(SiW11O39)2}2·xH2O [Ln = Ho3+ (compound 1), Dy3+ (compound 2), Eu3+ (compound 3), Er3+ (compound 4), Sm3+ (compound 5), Pr3+ (compound 6); x = 18 for 1, 5, 6; x = 20 for 2, 3, 4; enMe = 1,2-diaminopropane). Single-crystal X-ray diffraction analyses reveal that all the compounds are composed of two monovacant POMs, which are linked by one Ln3+ ion into a dimeric structure. The dimeric structure acts as an inorganic polydentate ligand coordinated with Cu2+ ions, which results in 3D MPFs with two channels. As the individual components integrated in the MPF materials posess fluorescent and magnetic properties, the luminescence properties and magnetic behavior of the resulting MPFs were measured.

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