Xiuli Wang

Bohai University, Chinchow, Liaoning, China

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Publications (78)193.09 Total impact

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    ABSTRACT: Four coordination polymers, [Cu(4-dpyh)0.5(1,2-BDC)(H2O)3]·H2O (1), [Cu(4-dpyh)(1,3-BDC)(H2O)] (2), [Cd(3-dpyh)0.5(1,3-BDC)(H2O)2]·H2O (3), and [Zn(3-dpyh)(1,3-BDC)]·3H2O (4) [4-dpyh = N,N′-bis(4-pyridinecarboxamide)-1,6-hexane, 3-dpyh = N,N′-bis(3-pyridinecarboxamide)-1,6-hexane, 1,2-H2BDC = 1,2-benzenedicarboxylic acid and 1,3-H2BDC = 1,3-benzenedicarboxylic acid], have been hydrothermally synthesized. X-ray diffraction analyses reveal that 1 is a discrete [Cu2(4-dpyh)(1,2-BDC)2] dinuclear structure. Compound 2 exhibits a 2-D grid layer constructed from 1-D linear [Cu(1,3-BDC)]n chains and [Cu(4-dpyh)]n chains. Compound 3 features a 1-D ladder-like chain formed by the 1-D linear [Cd(1,3-BDC)]n chains and 3-dpyh bridging ligands. Compound 4 displays a 2-D undulated layer containing meso-helical [Zn(3-dpyh)]n chains and linear [Zn(1,3-BDC)]n chains. The neighboring dinuclear complexes for 1, adjacent chains for 3, and adjacent layers for 2 and 4 are further linked by hydrogen bonding interactions to form 2-D (for 1) or 3-D supramolecular networks (for 2–4). The influences of the different dicarboxylates and metal on the structures of 1–4 have been discussed. The electrochemical behaviors of 1 and 2, the thermal stabilities and fluorescent properties of 1–4, and the fluorescent selectivities of 3 and 4 have been investigated.
    Journal of Coordination Chemistry 01/2015; 68(1). · 1.80 Impact Factor
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    ABSTRACT: A series of polyoxometalate (POM)-based metal-organic complexes constructed from a semi-rigid bis-pyridyl-bis-amide ligand have been hydrothermally synthesized and structurally characterized: [Cu2L2(PMoVI11MoVO40)(H2O)2]•2H2O (1), [Cu2L2(PWVI11WVO40)(H2O)6]•H2O (2), [Cu2L2(SiW12O40)(H2O)6]•H2O (3) and [Cu2L2(H2K2Mo8O28)(H2O)2] (4) (L = N,N’-bis(3-pyridinecarboxamide)-piperazine). Single-crystal X-ray analyses reveal that complex 1 is a 2D metal–organic architecture based on the Keggin-type [PMoVI11MoVO40]4- anions and quadrate Cu2L2 loops. Isostructural complexes 2 and 3 display 2D supramolecular networks based on 1D infinite chains, which are constructed from quadrate Cu2L2 loops and Keggin polyoxoanions. Complex 4 exhibits a 3D metal-organic framework derived from the newly-reported [K2Mo8O28]6- polyoxoanions and quadrate Cu2L2 loops. The L ligands show a μ3-bridging coordination mode (via ligation of two pyridyl nitrogen atoms and one carbonyl oxygen atom) in 1 and 4, and a μ2-bridging coordination mode (via ligation of two pyridyl nitrogen atoms) in 2 and 3, forming Cu2L2 loops in 1-4. The influence of amide group coordination modes and structural features of POMs on the structures of the title complexes have been discussed. The electrochemical properties and selective photocatalytic properties of the title complexes have been reported in this article.
    CrystEngComm 11/2014; · 3.88 Impact Factor
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    ABSTRACT: A dual-responsive drug delivery system simulating the AND logic gate is developed by core-cross-linking of a disulfide-containing anticancer prodrug with Cu2+ for safe and precise delivery of anticancer drug towards cell nuclei. These prodrug nanoparticles present nearly no premature drug release in extracellular matrix but allow a fast drug release under the intracellular condition with a low pH value and high glutathione levels.
    Chemical Communications 11/2014; · 6.38 Impact Factor
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    ABSTRACT: By utilizing pendant 4-butyl-1H-pyrazole (Hbpz) with a alkyl “tail” (CH2)3CH3, four Keggin-based complexes containing different transition metal multi-nuclear clusters and infinite chain were hydrothermally synthesized and structurally characterized, [CuI2(bpz)3(H6PW11CuIIO39)] (1), [CuII2(bpz)2(H2O)2(HPMo12O40)]3H2O (2), [Ag3(bpz)3(H2O)(H4SiW12O40)]2H2O (3) and [Ag5(bpz)4(H5/2PMo12O40)2]6H2O (4). Compound 1 contains a tetra-nuclear cluster [CuI4(bpz)6]2-, in which four CuI ions are fixed by six bpz ligands. These clusters are linked by Keggin anion dimers to form a 2D layer. In compound 2, the ptz ligands fuse the CuII ions and an infinite1D metal-organic chain is constructed with the Keggin anions hanging up and down covalently. Compound 3 owns a planar triangle tri-nuclear cycle [Ag3(bpz)3(H2O)] with three AgI as cores. These cycles build a 3D framework of 3 through the further linkages of Keggin anions and Ag-Ag bonds. In compound 4, there exist discrete [Ag5(bpz)4]+ clusters with four bpz fused by five AgI cores, which are linked by Keggin anions alternately to form a 1D chain. Adjacent chains share the Ag-O bonds and a 2D layer is constructed. The bpz ligand is firstly introduced to the POM field and its successive two N donors are essential for the construction of multi-nuclear clusters and infinite chain of 14. Additionally, the electrochemical and photocatalytic properties of the title compounds have been investigated.
    Dalton Transactions 11/2014; · 4.10 Impact Factor
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    ABSTRACT: A 3-fold interpenetrating 3D framework with a 4-connected CdSO4-like topology was obtained, which represents the first example of coordination polymers with the semi-rigid naphthalene-based bis-pyridyl-bis-amide ligand and shows excellent photocatalytic activity and selectivity for the decomposition of RhB.
    Inorganic Chemistry Communications 11/2014; · 2.02 Impact Factor
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    ABSTRACT: Dandelion-like CaCO3 (DCC) was successfully fabricated in the presence of [MMIM][Me2PO4]. [MMIM][Me2PO4] not only acts as a template to control the morphology of CaCO3, but also provides anion to adsorb CO2 in air facilitating the construction of polymorph CaCO3. The incorporation of DCC greatly improves the properties of PCL.
    RSC Advances 10/2014; · 3.71 Impact Factor
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    ABSTRACT: Two novel reduced molybdophosphate-based cadmium complexes, [Cd(MoO2)12(PO4)2(HPO4)2(H2PO4)4(OH)6][Cd(H2O)2]·(H2bpp)2·bpp·7H2O (1); [Cd(MoO2)12(PO4)4(HPO4)2(H2PO4)2(OH)6]{Cd(H2O)2[K(H2O)2]2}·(H4tpc)(H2bpp)·11H2O (2) (bpp = 1,3-bis-(4-pyridyl)propane, tpc = a,a-1,4-dihydroxy-e,e,e,e-1,2,4,5-tetra-(4-pyridyl)cyclohexane) have been synthesized by controlling in situ bpp transformation and characterized by IR and single crystal X-ray diffraction. Both compounds 1 and 2 are based on the [P4Mo6O28(OH)3]9− ([P4Mo6]) polyoxometalate units, which are further connected into sandwich-type [Cd(P4Mo6)2] dimers by cadmium ions. In compound 1, [Cd(P4Mo6)2] dimers are linked by cadmium ions to form one dimensional (1D) inorganic chains, which are extended into 2D supramolecular network by bpp/H2bpp through hydrogen bonding interactions. In 2, bpp molecules partially in situ transformed to tpc at the presence of Fe3+ ion and pH 4.5, and the [Cd(P4Mo6)2] dimers are linked by trinuclear {K2Cd(H2O)6} fragments to form 1D inorganic chains. Finally, the 1D chains are connected by H2bpp and in situ generated H4tpc molecules to construct a 3D supramolecular architecture through hydrogen bonding interactions. The Fe3+ ions and pH play important roles in the in situ ligand transformation, which show great effect on the assembly and structures of the title compounds. The electrochemical properties of compound 2 have been investigated.
    Inorganica Chimica Acta. 10/2014;
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    ABSTRACT: Three new inorganic–organic hybrid supramolecular architectures constructed from polyoxometalates (POMs) and flexible bis-pyridyl-bis-amide with different spacer lengths have been hydrothermally synthesized. Compounds 1–3 show (5,5)-, (4,8)- and (4,5)-connected 3D supramolecular frameworks, respectively. Compounds 1–3 represent the first examples of POM-based supramolecular hybrids derived from the flexible bis-pyridyl-bis-amide molecules and show good electrocatalysis activity.
    Inorganica Chimica Acta 09/2014; 421:342–348. · 1.69 Impact Factor
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    ABSTRACT: Two novel Anderson-type polyoxometalates (POMs)-based metal-organic frameworks (MOFs), namely, H{Cu2(μ2-OH)2L(1)[CrMo6(OH)6O18]}·4H2O (), {Cu2L(2)[CrMo(VI)5Mo(V)(OH)6O18](H2O)4}·4H2O () (L(1) = N,N'-bis(3-pyridinecarboxamide)-piperazine, L(2) = N,N'-bis(4-pyridinecarboxamide)-piperazine), are hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR spectra, powder X-ray diffraction (PXRD) and thermogravimetric analyses (TGA). In complex , the hexadentate [CrMo6(OH)6O18](3-) polyoxoanion bridges the Cu(II) ions to generate a 2D Cu-POM inorganic layer, which is further extended by the μ2-bridging L(1) ligands (via ligation of pyridyl nitrogen atoms) to form a 3D MOF with a 4,6-connected {4(4)·6(10)·8}{4(4)·6(2)} topology. Complex is also a 3D POM-based MOF exhibiting a {4(2)·8(4)} topology, which is constructed from the quadridentate [CrMo(VI)5Mo(V)(OH)6O18](4-) polyoxoanions and μ4-bridging L(2) ligands (via ligation of pyridyl nitrogen and carbonyl oxygen atoms). The different coordination modes of POM polyanions and the isomeric bis(pyridylformyl)piperazine ligands play key roles in the construction of the title complexes. In addition, the photocatalytic activities of the title complexes on the degradation of methylene blue (MB) under UV, visible light and sunlight irradiation have been investigated in detail.
    Dalton Transactions 06/2014; · 4.10 Impact Factor
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    ABSTRACT: A ruthenium complex (see picture) bearing an EGFR inhibiting 4-anilinoquinazoline ligand exhibits selectively anti-proliferative activity on EGF-stimulated growth of MCF-7, being more active to induce early-stage apoptosis than gefitinib.
    European Journal of Medicinal Chemistry 04/2014; 77:110–120. · 3.43 Impact Factor
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    ABSTRACT: A novel 3D metal-organic framework (MOF), [Cu4IICu2I(pzca)6(HPCuMo11O39)(H2O)6]•2H2O (1) (pzca = 2-pyrazinecarboxylicacid) was obtained, which represents the first compound constructed by the monosubstituted Keggin chains and metal–carboxylate chains. The electrochemical and photocatalytic properties also have been investigated.
    Inorganic Chemistry Communications 04/2014; 42:10–14. · 2.02 Impact Factor
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    ABSTRACT: Three silver-bis(triazole) three-dimensional (3D) metal-organic frameworks (MOFs) with Wells-Dawson type polyoxometalates (POMs) as high-connected inorganic ligands have been isolated: [Ag7(bte)4(H2O)(HP2W(VI)16W(V)2O62)]·2H2O (), [Ag7(btp)5(HP2W(VI)16W(V)2O62)]·H2O () and [Ag4(btb)3.5(P2W18O62)](H2btb)·2H2O () (bte = 1,2-bis(1,2,4-triazol-1-yl)ethane, btp = 1,3-bis(1,2,4-triazol-1-y1)propane, btb = 1,4-bis(1,2,4-triazol-1-y1)butane). Compound contains a 3D metal-organic subunit, which is constructed from 1D Ag/bte chains and 2D layers based on hexanuclear [Ag6(bte)2](6+) circuits. The [P2W18O62](8-) (P2W18) anions act as 10-dentate inorganic ligands incorporated into the channels of the 3D framework. In compound , the metal-organic subunits are a 2D layer constructed from the [Ag5(btp)2](5+) circuits and flexible Ag/btp helical chains. The P2W18 anions also act as 10-dentate inorganic ligands linking adjacent 2D layers to construct a 3D framework. Both and contain Ag-Ag bonds, which further stabilize the structures. Compared with and , the metal-organic subunit of is a 3D cage-like host architecture. Without the assistance of Ag-Ag bonds, two sets of these 3D MOFs interpenetrate each other to generate a 2-fold interpenetrating structure for stability, which are united by the 5-dentate P2W18 anions to construct an integrated 3D structure. The roles of coordination modes of silver centers and POMs, as well as the effects of organic ligand lengths on the metal-organic subunit and final structures, have been reported. In addition, the electrochemical properties, photochemical catalysis and antibacterial properties of title compounds have also been investigated.
    Dalton Transactions 02/2014; · 4.10 Impact Factor
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    ABSTRACT: P-glycoprotein, an ATP-dependent transporter expressed in the gastrointestinal tract and tumor cells, mediates the efflux transport of multiple drugs. Inhibition or induction of P-glycoprotein by herbal ingredients can lead to herb-drug interactions and thus influence the activities of P-glycoprotein substrate drugs. The present study aimed to explore the effect of nine naturally occurring ginsenosides and their intestinal bacterial metabolites on P-glycoprotein-mediated transport. The results showed that three ginsenoside metabolites (CK, Ppd, and Ppt) formed by intestinal bacteria significantly enhanced rhodamine 123 retention in Caco-2 cells, increased the absorptive permeability of rhodamine 123, and decreased the efflux ratio of digoxin in two absorption models, which were comparable to the effects of the known P-glycoprotein inhibitor verapamil. However, the prototype ginsenosides such as Rb1, Rb2, and Re showed no inhibitory effect on P-glycoprotein activity. In situ intestinal perfusion experiments also showed that CK, Ppd, and Ppt increased the absorption rate constant and permeability coefficient of rhodamine 123. Long-term treatment with CK, Ppd, and Ppt had no effect on P-glycoprotein mRNA expression in Caco-2 cells. In conclusion, CK, Ppd, and Ppt are potent P-glycoprotein inhibitors, indicating an unpredictable herb-drug interaction when ginsenosides are coadministered orally with P-glycoprotein substrate drugs.
    Planta Medica 02/2014; · 2.35 Impact Factor
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    ABSTRACT: A new Keggin-type polyoxometalate (POM)-based compound, [Ag9(ptz)5][PMoVI11MoVO40]·H2O (1) (ptzH = 5-phenyl-1H-tetrazole), was synthesized under hydrothermal conditions. Compound 1 exhibits a 2D layer containing AgI ribbons and hexa-nuclear AgI circles, which are further linked by AgI atoms and [PMoVI11MoVO40]4 − anions to construct a 3D framework. The electrochemical properties of compound 1 have been investigated.
    Inorganic Chemistry Communications 02/2014; 40:51–54. · 2.02 Impact Factor
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    ABSTRACT: The new isostructural compounds (IIIa, b) crystallize in the triclinic space group P with Z = 1 (single crystal XRD).
    ChemInform 01/2014; 45(3).
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    ABSTRACT: Cell encapsulation technology holds promise for the cell-based therapy. But poor mechanical strength and biocompatibility of microcapsule membrane are still obstacles for the clinical applications. A novel strategy is presented to prepare AC1 C2 A microcapsules with bi-functional membrane (that is, both desirable biocompatibility and membrane stability) by sequentially complexing chitosans with higher deacetylation degree (C1 ) and lower deacetylation degree (C2 ) on alginate (A) gel beads. Both in vitro and in vivo evaluation of AC1 C2 A microcapsules demonstrate higher membrane stability and less cell adhesion, because the introduction of C2 increases membrane strength and decreases surface roughness. Moreover, diffusion test of AC1 C2 A microcapsules displays no inward permeation of IgG protein suggesting good immunoisolation function. The results demonstrate that AC1 C2 A microcapsules with bi-functional membrane could be a promising candidate for microencapsulated cell implantation with cost effective usage of naturally biocompatible polysaccharides.
    Macromolecular Bioscience 01/2014; · 3.74 Impact Factor
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    ABSTRACT: Three octamolybdate-based metal-organic complexes (MOCs), namely, [H2en]2[Cu(pzca)2(Mo8O26)]·4H2O (), [Cu2(pzca)2(Mo8O26)0.5(H2O)4]·H2O () and [Cu(I)3Cu(II)4(pzca)7(Mo8O26)(H2O)2]·4H2O () (en = ethylenediamine, pzca = 2-pyrazinecarboxylic acid), have been successfully synthesized under hydrothermal conditions via adding different kinds of amine and adjusting the pH values. The single crystal X-ray diffraction, elemental analyses, IR spectra, and thermogravimetric analyses have been used to characterize the title complexes. In compound , the [Cu(pzca)2] units bridge the [β-Mo8O26](4-) clusters to generate a 1D chain, which is extended by hydrogen-bonding interactions to a 3D supramolecular structure. Compound exhibits a 3D coordination framework based on the 1D infinite [Cu2(pzca)2]n(2n+) zigzag chains and β-Mo8O26(4-) anions, and shows a trinodal 3,3,4-connected {8(3)}4{8(6)} topology containing a dodecagonal channel with the dimension of 13.496 × 19.642 Å(2). Compound is a 3D metal-organic network derived from the "λ"-like [Cu5(pzca)4] subunits and [β-Mo8O26](4-) anions, which represents a novel {4·6·8(3)·10}2{4·6·8}2{4(2)·10(4)}{4(2)·8(3)·10}{6·8(2)}2{6(2)·10(3)·12}{6(2)·8(2)·10(2)}{6(2)·8(3)·10}{6(3)}4 topology in octamolybdate-based MOCs. The structural diversities show that the different amines and pH value of the reaction system play key roles in the construction of high dimensional architectures. Moreover, the electrochemical behaviors and photocatalytic activity for compound have been investigated in detail.
    Dalton Transactions 11/2013; · 4.10 Impact Factor
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    ABSTRACT: Two new polyoxometalate (POM)-based metal-organic frameworks (MOFs) constructed from multinuclear silver-ptz cycle/belts, namely [Ag7(ptz)4(NO3)(H2O)][H4P2W18O62]·5H2O () and [Ag6(ptz)4(H2O)2][HPMo12O40]·3H2O () (ptzH = 5-(3-pyridyl)-1H-tetrazole), have been successfully synthesized under hydrothermal conditions via changing the polyoxoanions and adjusting the pH. Compound exhibits a 3D framework constructed from the Wells-Dawson [P2W18O62](6-) anion and a 2D layer based on two types of multinuclear Ag-ptz cycles. In compound , the 1D infinite multinuclear Ag-ptz belts consisting of repeated tetranuclear subunits [(Ag1)2(Ag2)2(ptz)4] are connected by Ag3 ions to form a 2D layer. The adjacent 2D layers are further linked by tetra-dentate Keggin [PMo12O40](3-) anions to construct a 3D framework. The structural analyses reveal that the different polyoxoanions have a great influence on the Ag(I)-ptz multinuclear cycle/belts and the whole structures. The influences of the pH and molar ratio of initial reactants in the hydrothermal process were also discussed. The electrochemical and photocatalytic properties of the title compounds have been studied in detail.
    Dalton Transactions 08/2013; · 4.10 Impact Factor
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    ABSTRACT: Immobilization of hepatocytes in microcapsules has been a potentially alternative methodology for bioartificial livers. Moreover, the stability and permeability are the key parameters of these microcapsules. However, these alginate-based microcapsules are unstable if the surrounding medium disrupts the ionic interactions between alginate and the polycation. As hundreds of components are included in human plamsa, the stability and permeability in plasma of microcapsules need to be sufficiently investigated. In the present study, the stability of three kinds of alginate-based microcapsules was evaluated when they were immersed in plasma. Our results showed that stability of alginate-α-poly (L-lysine) -alginate (α-APA) microcapsules was well maintained, better than those of alginate-ε-poly (L-lysine) -alginate (ε-APA) and alginate-chitosan-alginate (ACA) microcapsules. Also, factors affecting the stability of microcapsules in plasma were analyzed and it showed that heparin was the key factor that affected the stability of α-APA microcapsules, while heparin and low molecular electrolytes such as HCO3 (-) and H2 PO4 (-) /HPO4 (2-) were the factors to ε-APA and ACA microcapsules. In addition, the permeability evaluation showed no decrease in permeability of microcapsules after incubation in plasma. Our study might provide a foundation for the selection and modification of materials for microcapsule-based BAL devices.
    Journal of Biomedical Materials Research Part A 08/2013; · 2.83 Impact Factor
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    ABSTRACT: The complexation with organoruthenium fragments confers 4-anilinoquinazoline pharmacophores with higher potential for inducing cellular apoptosis while the highly inhibitory activity of 4-anilinoquinazolines against EGFR and the reactivity of the ruthenium centre to 9-ethylguanine are well preserved.
    Chemical Communications 07/2013; · 6.38 Impact Factor

Publication Stats

210 Citations
193.09 Total Impact Points

Institutions

  • 2007–2014
    • Bohai University
      Chinchow, Liaoning, China
  • 2006–2014
    • Chinese Academy of Sciences
      • Dalian Institute of Chemical Physics
      Peping, Beijing, China
  • 2008–2013
    • Sichuan University
      • • State Key Laboratory of Polymer Material Engineering
      • • College of Chemistry
      Hua-yang, Sichuan, China
  • 2006–2013
    • Northeast Institute of Geography and Agroecology
      • Dalian Institute of Chemical Physics
      Peping, Beijing, China