The first {P(2)W(12)}-based trimeric polyoxotungstates encapsulating various "guest" transition-metal and alkali-metal ions have been reported, exhibiting potentially aqua-ligand-induced capability of "trapping" metal ions.
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Single-Molecule Magnet Behavior of Confined Dy(III) in a Mixed Heteroatom-Substituted Polyoxotungstate.
Inorg Chem
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Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, Madhya Pradesh 462066, India.
Two heteroatom-templated Dy(III)-confined polyoxotungstates [HN(CH)]Na[Dy(HO)(WO)(HPSeWO)(α-SeWO)]·31HO () and [HN(CH)]KNa{[Dy(HO)WO][α-SeWO][HPSeWO]}·44HO () were synthesized by a one-pot aqueous reaction and structurally characterized. The most distinctive structural feature of complexes & is the simultaneous presence of both trivacant Keggin [α-SeWO] and Dawson [HPSeWO] building blocks containing P(III)-Se(IV) heteroatoms. The trimeric polyanion of can be represented as a fusion of two trivacant Keggin [α-SeWO] and Dawson [HPSeWO] building units encapsulating the [Dy(HO)(WO)] cluster.
View Article and Find Full Text PDFAn Unusual Bismuth-Antimony-Europium Cluster-Imbedded Polyoxotungstate and Its Bidirectional Luminescence Detection.
Inorg Chem
October 2023
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, China.
An unprecedented aggregate formed by two bismuth-antimony-europium cluster-imbedded tungsten-oxo clusters and one Krebs-type polyoxotungstate linker [HN(CH)]NaH[WO][B-β-BiWO]{[BiSbEuO(HO)][B-α-SbWO]}·124HO () was prepared. The polyoxoanion skeleton of contains a Krebs-type polyoxotungstate [WO][B-β-BiWO]} ({BiW}) () as a linker that offers six active coordinate O atoms (two μ-O and four μ-O atoms) to grasp two Bi-Sb-Eu cluster-imbedded tungsten-oxo clusters {[BiSbEuO(HO)][B-α-SbWO]} () through Bi-O-W and Sb-O-W bonds. comprises an unprecedented nona-nuclearity Bi-Sb-Eu [BiSbEuO(HO)] cluster encircled by three trivacant [B-α-SbWO]segments in a triangular motif through Eu-O-W, Sb-O-W, and Bi-O-W linkages into a trilobal trimer.
View Article and Find Full Text PDFTricarboxylic-Ligand-Decorated Lanthanoid-Inserted Heteropolyoxometalates Built by Mixed-Heteroatom-Directing Polyoxotungstate Units: Syntheses, Structures, and Electrochemical Sensing for 17β-Estradiol.
Inorg Chem
May 2021
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
Organic-inorganic hybrid metal-oxide clusters have been pursued for many years, benefiting from their abundant structures and prominent performances. Upon our exploration, a family of unusual mixed-heteroatom (Sb, P)-directing lanthanoid (Ln)-inserted heteropolyoxotungstates (Ln-HPOTs), [(CH)NH]NaH[Ln(HP)W(HO)(Hptca)O][SbWO]·27HO [Ln = Ce (), La (), Pr ()], functionalized by 1,2,3-propanetricarboxylic acid (Hptca) was achieved. The intriguing trimeric [Ln(HP)W(HO)(Hptca)O][SbWO] polyanion was established by two trivacant [B-α-SbWO] segments mounted on both sides and one rare [HPWO] segment at the bottom, which are bridged via an organic-inorganic hybrid [WLn(HO)O(Hptca)] central moiety.
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Nanoscale
August 2020
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China.
Two unique nanosized Nd-substituted selenotungstates NaK{[WNd(HO)(NO)O](B-α-SeWO)(α-SeWO)}·35HO (1) and [HN(CH)]HNa{[WNd(HO)O(OH)(β-SeWO)][WNd(HO)O(B-α-SeWO)]}·84HO (2) were prepared by reacting NaSeO, NaWO·2HO with Nd(NO)·6HO in aqueous solution by controlling different cations and pH values. 1 was synthesized at pH = 4.3 in the presence of KCl, whereas 2 was synthesized at pH = 3.
View Article and Find Full Text PDFCation-Directed Synthetic Strategy Using 4f Tungstoantimonates as Nonlacunary Precursors for the Generation of 3d-4f Clusters.
Inorg Chem
June 2020
Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria.
The first synthetic pathway using a series of four nonlacunary 4f-heterometal-substituted polyoxotungstate clusters Na[(Ln(HO)(OH)(CHCOO))(WO)(SbWO)]·HO (; Ln = Tb, Dy, Ho, Er, Y) as precursors for the directed preparation of nine new 3d-4f heterometallic tungstoantimonates KNaH[TM(HO)Ln(HO)(WO)(SbWO)]·HO (; TM = Co, Ni; Ln = Tb, Dy, Ho, Er, Y) has been developed. Systematic studies revealed an increased K content in the aqueous acidic reaction mixture to be the key step in the cation-directed preparation of 3d-4f compounds; among those, the Co-containing members represent the first examples of (Ln = Tb, Dy, Ho, Er, Y) heterometallic tungstoantimonates exhibiting the building block. All 13 compounds have been characterized thoroughly in the solid state by powder and single-crystal X-ray diffraction (XRD), revealing a cyclic trimeric polyoxometalate architecture with three units encapsulating a planar triangle of Ln ions in the case of and a heterometallic core of one TM and three Ln for (TM = Co, Ni; Ln = Tb, Dy, Ho, Er, Y).
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