Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 181, Issue 9, Pages 2488-2493Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.05.044
Keywords
polyoxometalate; tungstoarsenate; lanthanide; photoluminescence
Funding
- National Science Foundation of China [20571014]
- New Century Excellent Talents in University [NCET-07-0169]
- Northeast Normal University
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Six new lanthanide complexes, (H3O)[Ln(3)(H2O)(17)(x(2)-As2W17O61)] center dot nH(2)O ((1) Ln = Ce-III and n approximate to 13; (2) Ln = Pr-III and n approximate to 9; (3) Ln = Nd-III and n approximate to 14; (4) Ln = Sm-III and n approximate to 8; (5) Ln = Eu-III and n approximate to 4; (6) Ln = Gd-III and n approximate to 7). have been isolated by conventional solution method and Characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction. All the complexes are isomorphic and crystallize in the triclinic space group P-1. These complexes are 1D chain-like structures constructed by lanthanide cations and monovacant Dawson-type [x(2)-As2W17O61](10-) polyoxoanions. The striking feature of the structures is that there are three kinds of coordination environments for lanthanide cations, which are responsible for the formation of polymeric structures. Photoluminescence measurements reveal that 4 and 5 exhibit orange and red fluorescent emission at room temperature, respectively. (C) 2008 Elsevier Inc. All rights reserved.
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