TY - JOUR
T1 - Ln12-Containing 60-Tungstogermanates
T2 - Synthesis, Structure, Luminescence, and Magnetic Studies
AU - Wang, Kai Yao
AU - Bassil, Bassem S.
AU - Lin, Zhengguo
AU - Römer, Isabella
AU - Vanhaecht, Stef
AU - Parac-Vogt, Tatjana N.
AU - Sáenz De Pipaón, Cristina
AU - Galán-Mascarós, José Ramón
AU - Fan, Linyuan
AU - Cao, Jie
AU - Kortz, Ulrich
N1 - Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/12/7
Y1 - 2015/12/7
N2 - 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. Cagelike polyoxometalates: A new class of cagelike Ln12-containing 60-tungstogermanates (Ln=Eu, Gd, Dy) was prepared by the reaction of [α-GeW9O34]10- with LnIII ions in a weakly acidic aqueous medium. Depending on the size of the LnIII ion, the assemblies feature selective capture of two (Eu12), one (Gd12), or zero (Dy12) extra GeIV ions. Selective encapsulation of [Na(H2O)6]+ was observed for Eu12 and Gd12, whereas Dy12 incorporates a neutral, distorted-octahedral (H2O)6 cluster (see figure).
AB - 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. Cagelike polyoxometalates: A new class of cagelike Ln12-containing 60-tungstogermanates (Ln=Eu, Gd, Dy) was prepared by the reaction of [α-GeW9O34]10- with LnIII ions in a weakly acidic aqueous medium. Depending on the size of the LnIII ion, the assemblies feature selective capture of two (Eu12), one (Gd12), or zero (Dy12) extra GeIV ions. Selective encapsulation of [Na(H2O)6]+ was observed for Eu12 and Gd12, whereas Dy12 incorporates a neutral, distorted-octahedral (H2O)6 cluster (see figure).
KW - lanthanides
KW - luminescence
KW - magnetic properties
KW - polyoxometalates
KW - tungsten
UR - http://www.scopus.com/inward/record.url?scp=84948784204&partnerID=8YFLogxK
U2 - 10.1002/chem.201502457
DO - 10.1002/chem.201502457
M3 - Article
AN - SCOPUS:84948784204
SN - 0947-6539
VL - 21
SP - 18168
EP - 18176
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 50
ER -