New Series of Porous Ionic Crystals Constructed from Various Polyoxometalate Anions and Macrocations: Syntheses,Crystal Structures,and Comparison with Diverse Spatial Arrangement |
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| Authors: | Xiaoshu Qu Lin Xu Prof Yunfeng Qiu Guanggang Gao Fengyan Li Yanyan Yang |
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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 City / P. R. China., JiLin Institute of Chemical Technology;3. Changchun / P. R. China, Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal UniversityKey Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024 /P.R. China, Tel.: +86‐0431‐5099668, Fax: +86‐0431‐5099668 |
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| Abstract: | A new series of ionic crystals, KH2Cr3O(OOCCH3)6(H2O)3]α‐SiMo12O40] · 11 H2O ( 1 ), KH2Cr3O(OOCCH3)6(H2O)3]α‐SiW12O40]μ·μ11H2O ( 2 ), K2Cr3O(OOCCH3)6 (H2O)3]α‐PW12O40]μ· 17H2O ( 3 ), NaCr3O(OOCCH3)6(H2O)3]2α‐PMo12O40] · 11H2O ( 4 ), H5Cr3O(OOCCH3)6(H2O)3] α‐P2Mo18O62] · 10H2O ( 5 ) based on a polyoxometalate building block with a macrocation, have been synthesized in aqueous solution and structurally characterized by single‐crystal X‐ray diffraction, IR spectra, elemental analysis, thermogravimetric analysis (TGA). The polyanions and macrocations stacked alternately through hydrogen bonds as well as electrostatic interactions to constitute a novel porous microstructure. In the crystal structures of 1 , 2 , and 3 , oppositely charged cluster ions stacked alternately to form one‐dimensional channels. Compound 4 exhibits an unique structure that six macrocation pillars packed along the a‐axis to form a straight 1D channel, in which accommodates a polyoxometalate pillar. In compound 5 , six α‐Dawson‐type polyoxometalate pillars stacked on top of each other along the a‐axis to form a straight 1D channel, which houses a macrocation pillar. The magnetic investigation on compounds 1 and 5 shows a typical antiferromagnetic interaction of the macrocation Cr3O(OOCCH3)6(H2O)3]+, almost independent from the presence of polyoxometalate anions. |
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| Keywords: | Polyoxometalates Macrocations Ionic crystals Channel structures |
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