Lijuan Chen

Henan University, K’ai-feng-shih, Henan Sheng, China

Are you Lijuan Chen?

Claim your profile

Publications (59)127.65 Total impact

  • Hailou Li · Wen Yang · Yun Chai · Lijuan Chen · Junwei Zhao
    [Show abstract] [Hide abstract]
    ABSTRACT: Single crystals of Na13H7 [Ce(SeW17O59)2]·31H2O are prepared by reaction of Na2WO4 and Na2SeO3 with (NH4)2Ce(NO3)6 in an aqueous KCl-containing solution at pH 2 (stirring, 30 min; 17% yield).
    ChemInform 07/2015; 46(28). DOI:10.1002/chin.201528017
  • Junwei Zhao · Lijuan Chen · Fang Zhang · Xing Ma · Jie Luo
    [Show abstract] [Hide abstract]
    ABSTRACT: Two classes of novel tetra-iron substituted sandwich-type arsenotungastates (ATs) with supporting lanthanide (Ln) pendants KNa2 [Ln(H2O)7][Fe4(H2O)10(B-β-AsW9O33)2]•21H2O [Ln = LaIII (1), PrIII (2), NdIII (3), SmIII (4)] and [Ln(H2O)8]2[Fe4(H2O)8(L-thr)2(B-β-AsW9O33)2]•20H2O [Ln = LaIII (5), PrIII (6), NdIII (7), SmIII (8), EuIII (9), GdIII (10), TbIII (11), DyIII (12), ErIII (13)] (L-thr = L-threonine) have been synthesized by the hydrothermal reaction of the [As2W19O67(H2O)]14– precursor with Fe3+ cations and Ln3+ cations in the presence of L-thr or L-leucine and L-alanine and further characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. Structural analyses indicate that 1–4 display the inorganic 2-D sheet architecture constructed from tetra-iron sandwiched AT [Fe4(H2O)10(B-β-AsW9O33)2]6– fragments by bridging [Ln(H2O)7]3+ cations whereas the molecular structures of the isostructural 5–13 consist of an organic–inorganic hybrid tetra-iron substituted sandwich-type AT [Fe4(H2O)8(L-thr)2(B-β-AsW9O33)2]6– fragment and two pendant [Ln(H2O)8]3+ cations. As far as we know, 1–4 represent the rare inorganic 2-D extended ATs based on transition-metal substituted sandwich-type polyoxometalate units and Ln linkers and 5–13 are the first Fe–Ln heterometallic ATs with aminoacid ligands. The solid state photoluminescence (PL) measurements of 9 and 11 have been performed at room temperature. The PL emission of 9 is mainly derived from the characteristic 5D0→7F2 (J = 4–0) transitions of the EuIII cations whereas the PL behavior of 11 stems from the common contribution of the 5D4→7FJ (J = 5–3) transitions of TbIII ions and oxygen-to-metal (O→W) charge-transfer transitions of AT segments. The thermogravimetric (TG) analyses of 1–4 and 6–12 have been investigated.
    Dalton Transactions 05/2015; 44(28). DOI:10.1039/C5DT00696A · 4.20 Impact Factor
  • Junwei Zhao · Lijuan Chen · Xing-Hua Li · Jing Cao · Xing Ma · Jie Luo
    [Show abstract] [Hide abstract]
    ABSTRACT: The rational self-assembly of trilacunary Keggin precursor with Fe3+ and RE3+ (rare-earth) ions via a conventional aqueous solution method has led to a series of novel tungstoantimonate-based Fe–RE heterometallic derivatives [Pr(H2O)8][Pr(H2O)6][Fe4(H2O)10(B-β-SbW9O33)2]•16 H2O (1) and [RE(H2O)7]2[Fe4(H2O)10(B-β-SbW9O33)2]•22H2O [RE = TbIII (2), DyIII (3), LuIII (4), YIII (5)], which have been further structurally characterized by elemental analyses, IR spectra, powder X-ray diffraction (PXRD), single-crystal X-ray diffraction and thermogravimetric (TG) analyses. To the best of our knowledge, 1–5 represent the first purely inorganic Fe–RE heterometallic tungstoantimonates based on trilacunary Keggin [B-β-SbW9O33]9– unit. In 1, the tetra-FeIII substituted sandwich-type unit [Fe4(H2O)10(B-β-SbW9O33)2]6– is built up of two trilacunary Keggin subunits [B-β-SbW9O33]9– sandwiching a rhomb-like {FeIII4} cluster, and then the disordered PrIII cations work as bridges to link adjacent sandwich-type units [Fe4(H2O)10(B-β-SbW9O33)2]6–, giving rise to the first 2-D extended sheet based on tungstoantimonate fragments and Fe–RE heterometallic cations. 2–5 are isomorphic and exhibit the discrete structure composed of a tetra-FeIII substituted sandwich-type unit [Fe4(H2O)10(B-β-SbW9O33)2]6– and two supporting [RE(H2O)8]3+ cations. The electrochemical and electrocatalytic properties of 1 and 2 have been investigated in detail in 0.5 mol•L−1 Na2SO4 + H2SO4 supporting electrolyte and both 1 and 2 illustrate the obvious electrocatalytic activity to the reduction of NO2– and BrO3–.
    CrystEngComm 05/2015; 17(27). DOI:10.1039/C5CE00633C · 3.86 Impact Factor
  • Jie Luo · Pengfei Cheng · Junwei Zhao · Lijuan Chen
    [Show abstract] [Hide abstract]
    ABSTRACT: A new organic–inorganic hybrid silicotungstate [Cu2(phen)2Cl(H2O)(OH)]2[α-SiW12O40]·8 H2O (1) (phen = 1,10-phenanthroline) with supporting dinuclear copper complexes has been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectroscopy, and single-crystal X-ray diffraction. The molecular unit of 1 consists of two pendant coordination cations [Cu2(phen)2Cl(H2O)(OH)]2+ and one saturated Keggin-type silicotungstate polyoxoanion [α-SiW12O40]4− and eight lattice water molecules. The most intriguing feature is that each bi-copper cation [Cu2(phen)2(μ2-Cl)(H2O)(OH)]2+ is constructed from two [Cu(phen)]2+ cations linked by one μ2-Cl and one hydroxyl bridges. Magnetic measurements indicate that 1 demonstrates the ferromagnetic exchange interactions within CuII centers.
    Synthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry 05/2015; 45(5). DOI:10.1080/15533174.2013.841231 · 0.52 Impact Factor
  • Hailou Li · Wen Yang · Yun Chai · Lijuan Chen · Junwei Zhao
    [Show abstract] [Hide abstract]
    ABSTRACT: A novel cerium(IV)-hybridizing selenotungstate with Dawson-like structure Na13H7[Ce(SeW17O59)2] · 31H2O (1) has been synthesized by reaction of Na2WO4 · 2H2O, Na2SeO3 and (NH4)2Ce(NO3)6 in the aqueous solution and characterized by elemental analysis, IR spectrum, UV spectrum, thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. To the best of our knowledge, 1 stands for 1:2-type Dawson-like selenotungstate constructed from two identical [SeW17O59]12– moieties combined via one Ce4 + ion. The Ce4 + cation displays a distorted square prismatic geometry defined by eight oxygen atoms from two [SeW17O59]12– moieties. In the [Ce(SeW17O59)2]20– polyoxoanion, the {SeO3} trigonal pyramid encapsulated into the [SeW17O59]12– fragment is situated on the side close to the Ce4 + ion. The TGA curve of 1 reveals two steps of weight loss between 25 °C to 700 °C. Furthermore, the electrochemical and the eletrocatalytic properties of 1 have been measured by cyclic voltammetry (CV) in 0.5 M Na2SO4 + H2SO4 aqueous solution.
    Inorganic Chemistry Communications 03/2015; 56. DOI:10.1016/j.inoche.2015.03.012 · 2.06 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Three new metal-organic complexes Cu[Hbpdc](2) (1), [Ni(bpdc)(H2O)]center dot H2O (2) and [Ni(H(2)bpdc)(H2O)(2)] SO4 (3) (H(2)bpdc=2,2'-bipyridyl-5,5'-dicarboxylic acid) have been hydrothermally prepared and structurally characterized by elemental analyses, IR spectra, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction. 1 is a 3-D supramolecular architecture formed by hydrogen bonding interactions between carboxyl O atoms and strong face-to-face pi center dot center dot center dot pi stacking interactions between bipyridyl rings of Hbpdc(-) ligands, 2 exhibits an intriguing 2-D sheet constructed from [Ni(bpdc)(H2O)1 units and 3 displays an infinite 1-0 chain built by {[Ni(H(2)bpdc)(H2O)(2)](2+)} fragments through SO42-. Moreover, thermogravimetric (TG) and derivative thermogravimetric (DTG) analyses of 3 have been conducted and the TG curve shows two-stage weight loss between 300 and 950 K and the corresponding apparent activation energies are calculated by Ozawa-Flynn-Wall (OFW) method and Friedman method. The most probable kinetic model function of the dehydration reaction of 3 has been estimated by Coats-Redfern integral method and Achar-Bridly-Sharp differential method.
    Journal of Solid State Chemistry 01/2015; 221:5–13. DOI:10.1016/j.jssc.2014.09.006 · 2.20 Impact Factor
  • Jie Luo · Xing Ma · Lijuan Chen · Junwei Zhao
    [Show abstract] [Hide abstract]
    ABSTRACT: A novel organic–inorganic hybrid independent 1-D double-chain silicotungstate [Cu(biim)2][Cu(4,4'-bpy)(biim) (H2O)][α-SiW12O40] · 3H2O (1, biim = 2,2'-biimidazole, 4,4'-bpy = 4,4'-dipyridine) has been successfully synthesized by reaction of Na10[A-α-SiW9O34] · 18H2O, CuCl2 · 2H2O, EuCl3, biim and 4,4'-bpy under 160 °C hydrothermal environment and characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. The most remarkable structural feature of 1 is that two types of independent 1-D chains are paralleling and one is constructed from plenary Keggin [α-SiW12O40]4– units and [Cu(biim)2]2 + linkers while the other is based on [Cu(biim)(H2O)]2 + cations and 4,4'-bpy connectors. The variable-temperature magnetic susceptibility of 1 shows the weak antiferromagnetic exchange interactions within CuII centers. Furthermore, the solid-state electrochemical properties of 1 have been also measured in 0.5 mol · L–1 Na2SO4 + H2SO4 aqueous solution by entrapping it in a carbon paste electrode.
    Inorganic Chemistry Communications 01/2015; 54. DOI:10.1016/j.inoche.2015.01.015 · 2.06 Impact Factor
  • Lili Ren · Lijuan Chen · Hui Qi · Furong Li · Feili Gong
    [Show abstract] [Hide abstract]
    ABSTRACT: Human adipose tissue-derived stem cells (hASCs) are considered an ideal tool for the supply of insulin-producing cells to treat diabetes mellitus, with high differentiation efficiency. Islet neogenesis-associated protein (INGAP) is an initiator of islet neogenesis, and the peptide sequence comprising amino acids 104-118, named INGAP pentadecapeptide (INGAP-PP), has been shown to increase β-cell mass in animals and human pathological states. Here, we report a novel 4-step method to promote hASCs to differentiate into islet-like clusters (ILCs) more efficiently by adding INGAP-PP. The hASCs were isolated, purified and differentiated using a 4-step protocol including trichostatin A, INGAP-PP/scrambled peptide (Scrambled-P), dexamethasone, nicotinamide, glucagon-like peptide-1, transforming growth factor β1 and exendin-4. Results showed that ILCs in the INGAP-PP group were more similar to the fresh islets with regard to both size and morphology and expressed significantly higher levels of both insulin and C-peptide than those in the Scrambled-P group. Moreover, the ILCs from the INGAP-PP group secreted higher levels of insulin and C-peptide than those from the Scrambled-P group in response to both a low (5.6 mM) and high (25 mM) glucose challenge and secreted 6 times more hormones under the high-glucose challenge. Real-time PCR and immunocytochemistry showed that ILCs of the INGAP-PP group expressed human pancreatic endocrine hormones and transcription factors. Transplantation of ILCs into diabetic rats partially reversed diabetes and prolonged their life span. In conclusion, the INGAP-PP protocol can efficiently induce hASCs to differentiate into ILCs in vitro, and thus hASCs could be a promising source of cells for transplantation to treat diabetes mellitus. © 2014 S. Karger AG, Basel.
    Cells Tissues Organs 12/2014; DOI:10.1159/000362500 · 2.14 Impact Factor
  • Source
    Xuejun Liu · Xing Ma · Jing Zhang · Lijuan Chen · Junwei Zhao
    [Show abstract] [Hide abstract]
    ABSTRACT: An organic–inorganic hybrid CuII–ErIII heterometallic arsenotungstate Na3[Cu(en)2(H2O)][Cu(en)2]1.5[H3Er(α-AsW11O39)2]·4H2O (1) (en = ethylenediamine) has been hydrothermally synthesized and structurally characterized by elemental analyses, IR and UV spectra, X-ray photoelectron spectroscopy (XPS), cyclic voltammetry and single-crystal X-ray diffraction. 1 displays an organic–inorganic 2-D sheet structure constructed by sandwich-type [H3Er(α-AsW11O39)2]8− fragments and [Cu(en)2]2+ connectors. From the topological viewpoint, if the [H3Er(α-AsW11O39)2]8− fragments are viewed as 3-connected nodes and [Cu(en)2]2+ connectors are considered as linkers, the 2-D sheet can be simplified into a 2-D (6,3)-network topology.
    Arabian Journal of Chemistry 12/2014; 25. DOI:10.1016/j.arabjc.2014.12.002 · 2.68 Impact Factor
  • Jie Luo · Hailou Li · Xinxin Chen · Jianru Ma · Lijuan Chen · Junwei Zhao
    [Show abstract] [Hide abstract]
    ABSTRACT: Mono-copperII substituted silicotungstate•3-D four-connected framework with the Schläfli symbol of 64 · 8 · 10•Electro-catalytic activities toward the nitrite and bromated reduction
    Inorganic Chemistry Communications 12/2014; 50. DOI:10.1016/j.inoche.2014.10.003 · 2.06 Impact Factor
  • Junwei Zhao · Yan-Zhou Li · Jie Luo · Lijuan Chen
    [Show abstract] [Hide abstract]
    ABSTRACT: As an important ramification of polyoxometalates, germanotungstate (GT) chemistry has gradually developed as a new research focus and a challengeable area and has made a great progress in the past decade due to a wide range of potential applications in various areas such as catalysis, magnetism, photochemistry and materials science. In this review, we mainly focus on three categories the metal functionalized GTs: transition-metal (TM) substituted GTs (TMSGTs), rare-earth (RE) substituted GTs (RESGTs) and GT-based TM–RE heterometallic derivatives (GTTRHDs). We will discuss their synthetic strategies, structural features and some properties involving magnetism, electrochemistry and catalysis. Finally, some perspectives on this field are also provided and some possible directions for future work are outlined.
    RSC Advances 09/2014; 4(92). DOI:10.1039/C4RA08045A · 3.84 Impact Factor
  • Yingjie Liu · Hailou Li · Jingli Zhang · Junwei Zhao · Lijuan Chen
    [Show abstract] [Hide abstract]
    ABSTRACT: An organic-inorganic hybrid mono-Sm(III) substituted phosphotungstate KNa3[HPro]7[Sm(α-PW11O39)2]·Pro·18H2O (1) (Pro=d-proline) has been synthesized in the conventional aqueous solution and structurally characterized by elemental analyses, inductively coupled plasma atomic emission spectrometry (ICP-AES) analyses, IR spectra, UV spectra, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. The molecule of 1 consists of a classical 1:2-type [Sm(α-PW11O39)2](11-) fragment and free d-proline components. It should be pointed out that the synergistic action between the in-situ formed chiral [Sm(α-PW11O39)2](11-) fragment and chiral d-proline components results in the formation of the chiral 1. The luminescence emission of 1 reveals three characteristic bands that derive from the (4)G5/2→(6)H5/2, (4)G5/2→(6)H7/2 and (4)G5/2→(6)H9/2 transitions of the Sm(III) cation as well as the synergistic contribution of the O→W transitions of [α-PW11O39](7-) moieties and a π(*)-n or π(*)-π transitions of Pro. Its ferroelectric behavior has been measured.
    Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy 06/2014; 134C:101-108. DOI:10.1016/j.saa.2014.06.076 · 2.13 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Understanding host antibody response is crucial for predicting disease severity and for vaccine development. We investigated antibody responses against influenza A(H7N9) virus in 48 serum samples from 21 patients, including paired samples from 15 patients. IgG against subtype H7 and neutralizing antibodies (NAbs) were not detected in acute-phase samples, but ELISA geometric mean titers increased in convalescent-phase samples; NAb titers were 20-80 (geometric mean titer 40). Avidity to IgG against subtype H7 was significantly lower than that against H1 and H3. IgG against H3 was boosted after infection with influenza A(H7N9) virus, and its level in acute-phase samples correlated with that against H7 in convalescent-phase samples. A correlation was also found between hemagglutinin inhibition and NAb titers and between hemagglutinin inhibition and IgG titers against H7. Because of the relatively weak protective antibody response to influenza A(H7N9), multiple vaccinations might be needed to achieve protective immunity.
    Emerging Infectious Diseases 02/2014; 20(2):192-200. DOI:10.3201/eid2002.131094 · 7.33 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: A 1-D inorganic-organic composite tetra-nickel substituted sandwich-type phosphotungstate [Ni(H2O)(en)2]2[Ni(en)2]3 [Ni4(H2O)2(α-B-HPW9O34)2]·12H2O (1) (en = ethylenediamine) has been hydrothermally synthesized and structurally characterized. X-ray diffraction indicates that the molecular fragment of 1 consists of a classical tetra-NiII sandwiched polyoxoanion [Ni4(H2O)2(α-B-HPW9O34)2]10− and two [Ni(H2O)(en)2]2+ cations, three [Ni(en)2]2+ cations, and 12 lattice water molecules. The most remarkable feature is that each molecular fragment is connected with each other by [Ni(en)2]2+ bridges constructing the 1-D chain structure. The thermogravimetric curve of 1 shows three steps of weight loss. Magnetic susceptibility measurements demonstrate that 1 indicates the ferromagnetic couplings within nickel centers.
    Synthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry 01/2014; 44(1). DOI:10.1080/15533174.2013.768654 · 0.52 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: An organic–inorganic hybrid sandwich-type tungstoantimonate [Cu(en)2(H2O)]4[Cu(en)2(H2O)2][Cu2Na4(α-SbW9O33)2]·6H2O (1) has been synthesized by reaction of Sb2O3, Na2WO4·2H2O, CuCl2·2H2O with en (en=ethanediamine) under hydrothermal conditions and structurally characterized by elemental analysis, inductively coupled plasma atomic emission spectrometry, IR spectrum and single-crystal X-ray diffraction. 1 displays a centric dimeric structure formed by two equivalent trivacant Keggin [α-SbW9O33]9− subunits sandwiching a hexagonal {Cu2Na4} cluster. Moreover, those related hexagonal hexa-metal cluster sandwiched tungstoantimonates have been also summarized and compared. The variable-temperature magnetic measurements of 1 exhibit the weak ferromagnetic exchange interactions within the hexagonal {Cu2Na4} cluster mediated by the oxygen bridges.
    ChemInform 01/2014; 209:113–119. DOI:10.1002/chin.201408020
  • [Show abstract] [Hide abstract]
    ABSTRACT: Acute conjunctivitis is a common disease associated with high morbidity and economic burden. To clarify the etiological characteristics of acute conjunctivitis in Beijing, surveillance of acute conjunctivitis was conducted from July to October during 2007-2012 by collecting eye swabs from patients treated at surveillance hospitals affiliated with a surveillance program of 18 districts Center for Disease Prevention and Control in Beijing. Coxsackievirus A24 variant (CA24v), enterovirus 70 (EV70), human adenovirus (HAdV), herpes simplex virus (HSV), and chlamydia were identified by PCR. Phylogenetic analysis of the VP1 region of CA24v was conducted. Comparisons of proportions and statistical significance were performed using the chi-square test. HAdV was found to be the most prevalent pathogen, followed by CA24v, chlamydia, and HSV. Significant differences in the symptoms of ocular pain, photophobia, and epiphora were identified among the 4 agents. The prevalence of HAdV- and CA24v-mediated conjunctivitis peaked in July or August and September or October, respectively. Nucleotide sequences of the VP1 regions among the isolated CA24v strains shared 92.8%-100% homology. In conclusion, HAdV followed by CA24v, chlamydia, and HSV were the most common causative agents of acute conjunctivitis in Beijing. Comprehensive, continuous surveillance and advanced laboratory techniques are needed for further studies.
    Japanese journal of infectious diseases 01/2014; 67(5):349-55. DOI:10.7883/yoken.67.349 · 1.20 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: An organic-inorganic hybrid sandwich-type tungstoantimonate [Cu(en)(2)(H2O)](4)[Cu(en)(2)(H2O)(2)] [Cu2Na4(alpha-SbW9O33)(2)]center dot 6H(2)O (I) has been synthesized by reaction of Sb2O3, Na2WO4 2H(2)O, CuCl2 center dot 2H(2)O with en (en=ethanediamine) under hydrothermal conditions and structurally characterized by elemental analysis, inductively coupled plasma atomic emission spectrometry, IR spectrum and single-crystal X-ray diffraction. 1 displays a centric dimeric structure formed by two equivalent trivacant Keggin [alpha-SbW9O33](9-) subunits sandwiching a hexagonal {Cu2Na4} cluster. Moreover, those related hexagonal hexa-metal cluster sandwiched tungstoantimonates have been also summarized and compared. The variable-temperature magnetic measurements of 1 exhibit the weak ferromagnetic exchange interactions within the hexagonal {Cu2Na4} cluster mediated by the oxygen bridges.
    Journal of Solid State Chemistry 01/2014; 209:113-119. DOI:10.1016/j.jssc.2013.10.033 · 2.20 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: During surveillance for pneumonia of unknown etiology and sentinel hospital-based surveillance in Beijing, China, we detected avian influenza A(H7N9) virus infection in 4 persons who had pneumonia, influenza-like illness, or asymptomatic infections. Samples from poultry workers, associated poultry environments, and wild birds suggest that this virus might not be present in Beijing.
    Emerging Infectious Diseases 12/2013; 19(12):2041-3. DOI:10.3201/eid1912.130983 · 7.33 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: An organic-inorganic hybrid phosphotungstate-based Cu-II-La-III heterometallic derivative [Cu(dap)(2)(H2O)][Cu(dap)(2)](4.5) [La(-PW11O39)(2)](.)4H(2)O (1) (dap = 1,2-diaminopropane) has been prepared and characterized by elemental analysis, IR spectra, UV spectrum, optical diffuse reflectance spectrum, thermogravimetric analysis, and X-ray crystallography. Complex 1 exhibits a 2-D Cu-II-La-III heterometallic sheet architecture with a 4-connected topology established by dimeric [Cu(dap)(2)(H2O)](2)[Cu(dap)(2)](9)[La(-PW11O39)(2)](2) building units via [Cu(dap)(2)](2+) bridges. The optical diffuse reflectance spectrum indicates that 1 possesses the semiconductor characteristic. The thermogravimetric curve of 1 shows two steps of weight loss.
    Synthesis and Reactivity in Inorganic Metal-Organic and Nano-Metal Chemistry 10/2013; 44(2):171-176. DOI:10.1080/15533174.2013.768659 · 0.52 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: An inorganic-organic hybrid hexa-copper-substituted germanotungstate Na2[Cu(dap)2]2[Cu(dap)2] {[Cu6(H2O)2(dap)2][B-α-GeW9O34]2}·4H2O (1) (dap=1,2-diaminopropane) has been hydrothermally prepared and characterized by elemental analyses, inductively coupled plasma atomic emission spectrometry (ICP-AES) analyses, IR spectra, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and single-crystal X-ray diffraction. 1 displays the six-connected 3D network with the long topological (O'Keefe) vertex symbol is 4·4·64·4·4·4·4·64·4·4·4·64·4·4·4 and the short vertex (Schläfli) symbol of 41263. Magnetic measurements indicate that there are the overall ferromagnetic exchange interactions in the belt-like hexa-CuII cluster in 1. Furthermore, the electrochemical behavior and electrocatalysis of 1 modified carbon paste electrode (1-CPE) have been studied. The reductions of nitrite, bromate and hydrogen peroxide are principally mediated by the WVI-based wave.
    Journal of Solid State Chemistry 09/2013; 205:82-90. DOI:10.1016/j.jssc.2013.07.009 · 2.20 Impact Factor