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Steric hindrance-dependent rational design and synthesis of three new Keggin-based supramolecular networks

  • Xiao Zhang
  • , Zhihui Yi
  • , Liyan Zhao
  • , Qian Chen
  • , Xianmo Gu
  • , Jiqing Xu
  • , Xaolin Wang
  • , Chao Yang
  • , Xianzhu Xu
  • , Wujiong Xia*
  • *此作品的通讯作者
  • Harbin Institute of Technology
  • Jilin University
  • CAS - Changchun Institute of Applied Chemistry

科研成果: 期刊稿件 › 文章 › 同行评审

摘要

Three supramolecular architectures based on α-Keggin-type polyoxometalates have been synthesized hydrothermally, and their structures have been characterized by elemental analyses, infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and single crystal X-ray diffraction structure analyses. [Ni(enMe)2(H2O)2] 2[Ni(enMe)2PWVI9WV 3O40]·H2O (1) (enMe = 1,2′-propanediamine) exhibits a novel 2-D supramolecular sinusoidal layer through the interactions between transition metal complexes and 1-D covalent chains which are constructed from α-Keggin units bridged by transition metal complexes. [Ni(enMe)2]4{[Ni(enMe) 2][Ni(enMe)2(H2O)AsWVI 6WV4VIV4O 42]2}·6H2O (2), representing a 3-D supramolecular framework with 1-D channels, contains the first example of a tungstate dimer with inorganic-organic composite surfaces built up from [Ni(enMe)2]2+ cation bridges and bi-capped α-Keggin polyoxometalate building blocks supporting the transition metal complex. [Ni(enMe)2]4{[Ni(enMe)2][Ni(enMe) 2(H2O)AsMoVI4MoV 4VIV8O44]2} ·8H2O (3), showing a 3-D supramolecular framework with 1-D channels, contains the first example of a molybdoarsenate dimer formed by [Ni(enMe)2]2+ cations bridging two neighboring tetra-capped α-Keggin-based molybdates that support the transition metal complex [Ni(enMe)2H2O]. The topological networks of the supramolecular frameworks of 2 and 3 are analogous. Crystal structural analysis reveals that the dimensionality and the organization of polyoxometalate building units in the solid state can be tuned by the steric hindrances of the polyanions. Both 2 and 3 exhibit intensive photoluminescence.

源语言英语
页(从-至)9198-9206
页数9
期刊Dalton Transactions
期42
DOI
出版状态已出版 - 2009
已对外发布是

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