English  |  正體中文  |  简体中文  |  Items with full text/Total items : 65318/65318 (100%)
Visitors : 21718040      Online Users : 173
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28284


    Title: Dissolution/Reorganization toward the Destruction/Construction of Porous Cobalt(II)- and Nickel(II)-Carboxylate Coordination Polymers
    Authors: Ding,MT;Wu,JY;Liu,YH;Lu,KL
    Contributors: 中央大學
    Keywords: SINGLE-CRYSTAL TRANSFORMATION;METAL-ORGANIC FRAMEWORK;DIMENSIONAL ZINC PHOSPHATES;BILAYER OPEN FRAMEWORK;SOLID-STATE;BENZENETETRACARBOXYLATE IONS;STRUCTURAL TRANSFORMATIONS;SUPRAMOLECULAR ISOMERISM;3-DIMENSIONAL STRUCTURES;SPONTANEOUS RESOLUTION
    Date: 2009
    Issue Date: 2010-06-29 19:45:28 (UTC+8)
    Publisher: 化學研究所
    Abstract: The alkali-metal-ration-induced structural transformation of porous coordination polymers (CPs), {A(2)[M-3(btec)(2)(H2O)(4)]}(n) (1,A = K, M = Co; 2, A = K, M = Ni; 3, A = Cs, M = Co; and 4, A = Cs, M = Ni; btec = benzene-1,2,4,5-tetracarboxylate), occurred via a unique dissolution/reorganization process in the presence of an alkali chloride (LiCl, NaCl) in water. Treatment of 1 or 2 in an aqueous solution of LiCl resulted in the formation of new metal-carboxylate species [Co-2(btec)(H2O)(10)]center dot H2O (5 center dot H2O) and {Li-2[Ni-3(btec)(2)(H2O)(10)]center dot 3.5H(2)O}(n)(6 center dot 3.5H(2)O), respectively. When NaCl was used in place of LiCl under similar reaction conditions, similar dissolution/reorganization processes were observed. The cobalt species 1 and 3 were converted into the metal-carboxylate product [Na2Co(btec)(H2O)(8)](n) (7), whereas the nickel-carboxylate frameworks 2 and 4 were transformed into {[Na4Ni2(btec)(2)(H2O)(18)]center dot 3H(2)O}(n) (8 center dot 3H(2)O). Single-crystal X-ray diffraction analysis revealed that 5 center dot H2O is a discrete molecule, which extends to a hydrogen-bonded 3D porous supramolecular network including tetrameric water aggregates. Compound 6 center dot 3.5H(2)O adopts a 3D polymeric structure with a novel (2,4,4)-connected net on the basis of a 4-connecting organic node of a btec ligand, a square-planar 4-connecting metallic trans-Ni(O2C)(4)(H2O)(2) node, and a 2-connecting octahedral metallic trans-Ni(O2C)(2)(H2O)(4) hinge. Compound 7 possesses a 3D polymeric structure comprised of two types of intercrossed (4,4)-layers, a [Co-II(btec)]-based layer and a [Na-I(btec)]-based layer, in a nearly perpendicular orientation (ca.87 degrees). Compound 8 center dot 3H(2)O adopted a 2D sheet network by utilizing heterometallic trinuclear clusters of Na2Ni (O2C)(5)(H2O)(9) as secondary building units. Each sheet is hydrogen-bonded to neighboring units, giving a 3D supramolecular network. It is noteworthy that the dissolution/reorganization process demonstrates the cleavage and reformation of metal-carboxylate bonds, leading to a destruction/construction structural transformation of CPs.
    Relation: INORGANIC CHEMISTRY
    Appears in Collections:[化學研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML330View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明