Ln12‐Containing 60‐Tungstogermanates: Synthesis,Structure, Luminescence,and Magnetic Studies |
| |
| Authors: | Kai‐Yao Wang Dr Bassem S Bassil Dr Zhengguo Lin Isabella Römer Stef Vanhaecht Prof Tatjana N Parac‐Vogt Dr Cristina Sáenz de Pipaón Prof José Ramón Galán‐Mascarós Linyuan Fan Prof Jie Cao Prof Ulrich Kortz |
| |
| Institution: | 1. Jacobs University, Department of Life Sciences and Chemistry, P.O. Box 750 561, 28725 Bremen (Germany) http://www.jacobs‐university.de/ses/ukortz;2. Department of Chemistry, Faculty of Sciences, University of Balamand, P.O. Box 100, Tripoli (Lebanon);3. Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven (Belgium);4. Institute of Chemical Research of Catalonia (ICIQ), Av. Paisos Catalans 16, 43007 Tarragona (Spain);5. Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluis Companys, 23, 08010, Barcelona (Spain);6. Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic, Conversion Materials, School of Chemistry, Beijing Institute of Technology, Beijing 100081 (P.R. China) |
| |
| Abstract: | A new class of hexameric Ln12‐containing 60‐tungstogermanates, Na(H2O)6?Eu12(OH)12(H2O)18Ge2(GeW10O38)6]39? ( Eu12 ), Na(H2O)6?Gd12(OH)6(H2O)24Ge(GeW10O38)6]37? ( Gd12 ), and (H2O)6?Dy12(H2O)24(GeW10O38)6]36? ( Dy12 ), comprising six di‐Ln‐embedded {β(4,11)‐GeW10} subunits was prepared by reaction of α‐GeW9O34]10? with LnIII ions in weakly acidic (pH 5) aqueous medium. Depending on the size of the LnIII ion, the assemblies feature selective capture of two (for Eu12 ), one (for Gd12 ), or zero (for Dy12 ) extra GeIV ions. The selective encapsulation of a cationic sodium hexaaqua complex Na(H2O)6]+ was observed for Eu12 and Gd12 , whereas Dy12 incorporates a neutral, distorted‐octahedral (H2O)6 cluster. The three compounds were characterized by single‐crystal XRD, ESI‐MS, photoluminescence, and magnetic studies. Dy12 was shown to be a single‐molecule magnet. |
| |
| Keywords: | lanthanides luminescence magnetic properties polyoxometalates tungsten |
|
|
