A5020064481- Polyoxometalates: Synthesis and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Nanocluster Synthesis and Applications
- Magnetism in coordination complexes
- Advanced Nanomaterials in Catalysis
- Supramolecular Chemistry and Complexes
- Lanthanide and Transition Metal Complexes
- Chemical Synthesis and Reactions
- Magnetic Properties and Applications
- Nanoplatforms for cancer theranostics
- Magnetic properties of thin films
- Luminescence and Fluorescent Materials
- Magnetic Properties of Alloys
- Microstructure and Mechanical Properties of Steels
- Covalent Organic Framework Applications
- Chemical Synthesis and Characterization
- Vanadium and Halogenation Chemistry
- Advanced NMR Techniques and Applications
- Theoretical and Computational Physics
- Metal complexes synthesis and properties
- Advanced battery technologies research
- Crystallography and molecular interactions
- Synthetic Organic Chemistry Methods
Harbin Institute of Technology
2019-2024
Harbin University
2019-2021
Ames National Laboratory
1998-2014
Iowa State University
1998-2014
Emory University
2003-2012
RWTH Aachen University
2008-2011
The University of Tokyo
2008
University of Maryland, College Park
2008
United States Department of Energy
2008
University of New Mexico
2007
Small but influential: Chirality transfer from a small chiral organic unit (D- or L-tartrate) to very large metal–oxide framework is demonstrated by the enantiomerically pure, nonracemizing polytungstates d- L-1 (see picture, central part shown in polyhedral form; purple Zr, gray W, blue P, black C, red O). The tartrate determines absolute configuration of inorganic moiety, offering new method control chirality polyoxoanions.
The first organic-inorganic hybrid complexes between CB[n] and polyoxometalates not only display a surprisingly high structural complementarity, the right pairing also allows their chemical physical properties to be coupled, as illustrated by two examples.
In a nutshell: A 4.3 nm core–shell aggregate of 16 polyoxotungstate building units (see picture the W/Mn skeleton) delineates upper limit for structural complexity in molecular metal oxide cluster chemistry to date. This structure is defined by backbone network dual MnOW bridges; retroanalysis their formation suggests importance templation and kinetic control self-assembly {MnIII40WVI224} polyanion.
Small anion, big task: The assembly of a ten-component, heterochiral polyoxometalate aggregate, driven by the templating effect single phosphate proceeds through coordination-number-controlled formation route from three dimeric Dawson anion based magnetic building blocks.
Antibiotic contamination of water bodies is a major environmental concern. Exposure to superfluous antibiotics an ecological stressor correlated the development antibiotic resistance. Thus, it imperative that effective methods are developed simultaneously detect and remove such so as avoid inadvertent release. Herein, two flexible three-dimensional (3D) zinc-based metal–organic frameworks (MOFs) {[Zn2(bcob)(OH)(H2O)]·DMA}n (ROD-Zn1) {[Zn(Hbcob)]·(solvent)}n (ROD-Zn2) (H3bcob =...
The rational development of an anion templation strategy for the construction macrocycles has been historically limited to small anions, but large polyoxoanions can offer unmatched structural diversity and ample binding sites. Here we report formation a {Mo22 Fe8 } macrocycle by using Preyssler anion, [NaP5 W30 O110 ]14- ({P5 }), as supramolecular template. displays selective behavior in solution. In solid state, 1 : 2 host-guest complex, {P5 }2 ⊂{Mo22 }, transports protons more effectively,...
Abstract The syntheses of atomically precise silver (Ag) clusters stabilized by multidentate lacunary polyoxometalate (POM) ligands have been emerging as a promising but challenging research direction, the combination redox‐active POM and will render them unexpected geometric structures catalytic properties. Herein, we report successful construction two structurally‐new POM‐stabilized Ag clusters, TBA 6 H 14 (DPPB) 4 (CH 3 CN) 9 [Ag 24 (Si 2 W 18 O 66 ) ] ⋅ 10CH CN 9H ( {Ag } , TBA=tetra‐ n...
Abstract Noninvasive sonodynamic therapy (SDT) shows promise for brain glioma treatment due to deep tissue‐penetrating capabilities (>10 cm) of ultrasound and high spatial resolutions. Yet, this technique is hindered by inefficient production reactive oxygen species (ROS), resulting from the hypoxic tumor microenvironment (TME), level ROS scavenger glutathione (GSH), inability visualize in vivo precise management monitoring current sonosentizers. To address these challenges, we fabricated...
Abstract Carbonate‐assisted hydrolysis of Y or Yb III ions in the presence trivacant Wells–Dawson polyoxoanion, α‐[P 2 W 15 O 56 ] 12− , produced two polyoxometalate‐supported Y– –hydroxo/oxo clusters, which have been characterized by single‐crystal X‐ray structure determination. The complex consists a distorted 4 (OH) cubane cluster encapsulated lacunary units, while features hexametallic core centered around μ 6 ‐oxo atom with each ${{\rm Yb}{{{\rm III}\hfill \atop 3\hfill}}}$ triangular...
The functionalization of a pre-formed, high oxidation state {CeIV MnIV 6} cluster with lacunary phosphotungstate, [alpha-P2 W15 O 56]12-, exemplifies straightforward route for grafting redox-active building blocks to existing Mn-carboxylate clusters and modeling their deposition onto metal oxide surfaces.
A chiral polyoxometalate [Hf(PW11O39)2]10- (1) has been prepared and structurally characterized. It crystallizes in the space group P2(1)2(1)2, as a conglomerate of two enantiomerically pure crystals absence any source. The absolute configuration 1 was determined from Flack parameter by X-ray crystallography. structure comprises lacunary [PW11O39]7- units, each functioning tetra-dentate ligand sandwiching an 8-coordinate HfIV centre distorted square antiprismatic geometry. Optically active...
Binding an established single-molecule magnet cluster of distorted cubane type [Mn(III)(3)Mn(IV)O(4)] to the lacunary site {alpha-P(2)W(15)} polyoxotungstate scaffold results in a surprising zero-field splitting inversion and subsequent loss magnetization bistability.
Terminal oxo complexes of the late transition metals Pt, Pd, and Au have been reported by us in Science Journal American Chemical Society. Despite thoroughness characterizing these (multiple independent structural methods up to 17 analytical one case), we continued study structures. Initial work on systems was motivated data from X-ray crystallography neutron diffraction (17)O (31)P NMR signatures which all indicated differences previously published compounds. With significant new data, now...
Ligand modification transforms a polyoxometalate-anchored cubane-type [MnIII3MnIVO4] core into centrosymmetric [MnIII6MnIVO8] di-cubane cluster, and restores the slow magnetization relaxation characteristics typical for [Mn4O4] cubane-based single-molecule magnets.
A tritopic, Ni-substituted Keggin cluster, {SiW9 Ni4 }, assembles with rigid dicarboxylate linkers to give rise a set of discrete, POM2n L3n -type structures (POM={SiW9 }) defined interior voids. The outcome coordination-driven self-assemblies these polyhedral cages-from fused dimers trigonal prisms-was found be sensitive bend angles the ditopic ligands, which vary from 122° 180°. These polyoxotungstate-based metal-organic polyhedra, when coupled [Ru(bpy)3 ]Cl2 as photosensitizer and...
Pure enantiomers of a polytungstate cluster [(α-P2W16O59)Zr2(μ3-O)(mal)]218− (mal = malate) have been obtained and their conversion to meso diastereomers was observed by 31P NMR.
POM and circumstance: Nanometer-sized polyoxometalates (POMs) bring a new direction to anion-templated supramolecular chemistry. The Keggin (left) Dawson-type (right) polyoxoanions direct the assembly of giant metallomacrocycles through an array weak hydrogen-bonding interactions. concerted action multiple hydrogen bonds keeps templating guests embedded within hosts, even in solution state. As service our authors readers, this journal provides supporting information supplied by authors. Such...
The structurally new, carbon-free pentadecanuclear Fe-containing polyoxometalate, Na21[NaFe15(OH)12(PO4)4(A-α-SiW9O34)4]·85H2O (Na21-Fe15P4(SiW9)4), was synthesized using a facile one-pot, solution-based synthetic approach and systematically characterized by various spectroscopic techniques. Single-crystal X-ray diffraction reveals that the title complex is composed of two [Fe4(A-α-SiW9O34)] fragments [Fe3.5(A-α-SiW9O34)] stabilized four PO4 linkers in tetrameric style with idealized Td...
Calixarenes are among the most useful and versatile macrocycles in supramolecular chemistry. The one thing that has not changed 80 years since their discovery, despite numerous derivatizations, is fully organic, covalent scaffolds. Here, we report a new type of organic-inorganic hybrid "calixarenes" constructed by means coordination-driven assembly. Replacing acetate ligands on {SiW
Reaction of A-alpha-PW(9)O(34)(9)(-) with YCl(3) in an aqueous Na(2)CO(3) solution produces a dianion-encapsulated A-type sandwich polyoxometalate, (YOH(2))(3)(CO(3))(A-alpha-PW(9)O(34))(2)(11)(-). The X-ray structure this complex reveals that three Y(III) ions are sandwiched between two moieties and carbonate dianion is encapsulated the same plane as atoms. oxygen atoms CO(3)(2)(-) sitting at midpoints sides triangle formed by ions. (31)P (13)C NMR studies confirm significantly more stable...
In contradiction to current bonding paradigms, two terminal Au-oxo molecular complexes have been synthesized by reaction of AuCl3 with metal oxide-cluster ligands that model redox-active oxide surfaces. Use K10[α2-P2W17O61]·20H2O and K2WO4 (forming the [A-PW9O34]9- ligand in situ) produces K15H2[Au(O)(OH2)P2W18O68]·25H2O (1); use K10[P2W20O70(OH2)2]·22H2O (3) K7H2[Au(O)(OH2)P2W20O70(OH2)2]·27H2O (2). Complex 1 crystallizes orthorhombic Fddd, a = 28.594(4) Å, b 31.866(4) c 38.241(5) V...