Jump to main content
Jump to site search

Issue 35, 2012
Previous Article Next Article

Novel polyoxometalate hybrids consisting of copper–lanthanide heterometallic/lanthanide germanotungstate fragments

Author affiliations

Abstract

Three organic–inorganic hybrid copper–lanthanide heterometallic germanotungstates, {[Cu(en)2(H2O)] [Cu3Eu(en)3(OH)3(H2O)2](α-GeW11O39)}2·11H2O (1), {[Cu(en)2(H2O)][Cu3Tb(en)3(OH)3(H2O)2](α-GeW11O39)}2·11H2O (2) and {[Cu(en)2(H2O)][Cu3Dy(en)3(OH)3(H2O)2](α-GeW11O39)}2·10H2O (3) and three polyoxometalate hybrids built by lanthanide-containing germanotungstates and copper–ethylendiamine complexes, Na2H6[Cu(en)2(H2O)]8{Cu(en)2[La(α-GeW11O39)2]2}·18H2O (4), K4H2[Cu(en)2(H2O)2]5[Cu(en)2(H2O)]2[Cu(en)2]2{Cu(en)2[Pr(α-GeW11O39)2]2}·16H2O (5) and KNa2H7[enH2]3[Cu(en)2(H2O)]2[Cu(en)2]2{Cu(en)2[Er(α-GeW11O39)2]2}·15H2O (6) (en = ethylenediamine) have been hydrothermally synthesized and structurally characterized by elemental analyses, inductively coupled plasma atomic emission spectrometry (ICP–AES) analyses, IR spectra, powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS) and single-crystal X-ray diffraction. 1–3 are essentially isomorphous and their main skeletons display the interesting dimeric motif {[Cu3Ln(en)3(OH)3(H2O)2](α-GeW11O39)}24−, which is constructed from two {Cu3LnO4} cubane anchored monovacant [α-GeW11O39]8− fragments through two W–O–Ln–O–W linkers. The primary backbones of 4–6 exhibit the tetrameric architecture {Cu(en)2[Ln(α-GeW11O39)2]2}24− built by two 1 : 2-type [Ln(α-GeW11O39)2]13− moieties and one [Cu(en)2]2+ bridge, albeit they are not isostructural. To our knowledge, 1–6 are rare polyoxometalate derivatives consisting of copper–lanthanide heterometallic/lanthanide germanotungstate fragments. 1 exhibits antiferromagnetic coupling interactions within the {Cu3EuO4} cubane units, while 2 and 3 display dominant ferromagnetic interactions between the TbIII/DyIII and CuII cations. The room-temperature solid-state photoluminescence properties of 1–3 have been investigated.

Graphical abstract: Novel polyoxometalate hybrids consisting of copper–lanthanide heterometallic/lanthanide germanotungstate fragments

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 May 2012, accepted on 16 Jul 2012 and first published on 17 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT30949A
Citation: Dalton Trans., 2012,41, 10740-10751
  •   Request permissions

    Novel polyoxometalate hybrids consisting of copper–lanthanide heterometallic/lanthanide germanotungstate fragments

    J. Zhao, D. Shi, L. Chen, Y. Li, P. Ma, J. Wang and J. Niu, Dalton Trans., 2012, 41, 10740
    DOI: 10.1039/C2DT30949A

Search articles by author

Spotlight

Advertisements