کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1302208 | 1498961 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Weakley sandwich-type anion in organic–inorganic hybrid compound with 3D framework Weakley sandwich-type anion in organic–inorganic hybrid compound with 3D framework](/preview/png/1302208.png)
Reaction of Na2WO4·2H2O, GeO2, Cu(Ac)2·H2O and H4EGTA in conventional conditions results in formation of a new compound, (H3O)4Cu(H2O)6[K6(H2O)17Cu2(EGTA)(H2O)2{Cu4(H2O)2(B-α-GeW9O34)2}]·9H2O (1) (EGTA = ethyleneglycol-bis-(2-aminoethylether)-N,N,N′,N′-tetraacetate tetraanion). Its crystal structure was determined with X-ray diffraction method. The in situ synthesized [Cu4(H2O)2(B-α-GeW9O34)2]12 − has the typical Weakley sandwich structure and acts as an eleven-dentate ligand linking nine K+ ions and two Cu2 + ions. All Cu2 + ions are in an elongated octahedral environment. Two Cu2 + ions are chelated by EGTA from two ends and coordinated by terminal oxygen atoms of [Cu4(H2O)2(B-α-GeW9O34)2]12 −, forming a chain CuEGTA-Cu4(H2O)2(GeW9O34)2. K+ ions connect the chains into a complicated three dimensional framework. The magnetic measurement shows that 1 exhibits antiferromagnetic property.
Weakley sandwich-type anion [Cu4(H2O)2(B-α-GeW9O34)2]12 − was in situ synthesized and acts as an eleven-dentate ligand linking nine K+ ions and two Cu2 + ions in (H3O)4Cu(H2O)6[K6(H2O)17Cu2(EGTA)(H2O)2{Cu4(H2O)2(B-α-GeW9O34)2}]·9H2O (1), which is the highest dentate number for the anion. [Cu4(H2O)2(B-α-GeW9O34)2]12 −, Cu2 + ions and EGTA are assembled into a complicated 3D framework with antiferromagnetic property.Figure optionsDownload as PowerPoint slideHighlights
► [Cu4(H2O)2(B-α-GeW9O34)2]12 − was in situ synthesized in presence of H4EGTA.
► [Cu4(H2O)2(B-α-GeW9O34)2]12 − acts as an eleven-dentate ligand in the compound.
► The chelating ligand EGTA plays an important role in constructing 3D framework.
► 1 is first structurally-defined compound of [Cu4(H2O)2(GeW9O34)2]12 − and Cu-EGTA.
Journal: Inorganic Chemistry Communications - Volume 29, March 2013, Pages 45–48