Baicheng Teachers College

Baicheng, China

Baicheng Teachers College

Baicheng, China
SEARCH FILTERS
Time filter
Source Type

Fu Y.,Baicheng Teachers College
Journal of Coordination Chemistry | Year: 2010

A new linear-chain structure based on heptamolybdates with the linkage of {Ce(H2O)5} units, (C6H13N 4)2(H3O)[Ce(H2O)5Mo 7O24] 4H2O (1) has been synthesized and characterized by single crystal X-ray diffraction, IR spectroscopy, elemental analysis, and thermogravimetric analysis. Magnetic studies show strong spin-orbital coupling interactions and/or antiferromagnetic interactions within Ce(III) centers. © 2010 Taylor & Francis.


Cao T.,Northeast Normal University | Cao T.,Baicheng Teachers College | Li Y.,Baicheng Teachers College | Wang C.,Northeast Normal University | And 3 more authors.
Journal of Sol-Gel Science and Technology | Year: 2010

Combining the versatility of electrospinning technique and hydrothermal growth of nanostructures enabled the fabrication of hierarchical CeO 2/TiO2 nanofibrous mat. The as-prepared hierarchical heterostructure consisted of CeO2 nanowalls growing on the primary TiO2 nanofibers. Interestingly, not only were secondary CeO 2 nanowalls successfully grown on TiO2 nanofibers substrates, but also the CeO2 nanowalls were uniformly distributed without aggregation on TiO2 nanofibers. The photocatalytic studies suggested that the CeO2/TiO2 heterostructures showed enhanced photocatalytic efficiency compared with bare TiO2 nanofibers under UV light irradiation. © 2010 Springer Science+Business Media, LLC.


Cao T.,Northeast Normal University | Cao T.,Baicheng Teachers College | Li Y.,Baicheng Teachers College | Wang C.,Northeast Normal University | And 3 more authors.
Materials Research Bulletin | Year: 2010

Combining the versatility of electrospinning technique and hydrothermal growth of nanostructures enabled the fabrication of hierarchical CeO 2/TiO2 nanofibrous mat. The as-prepared hierarchical heterostructure consisted of CeO2 nanostructures growing on the primary TiO2 nanofibers. Interestingly, not only were secondary CeO2 nanostructures successfully grown on TiO2 nanofibers substrates, but also the CeO2 nanostructures were uniformly distributed without aggregation on TiO2 nanofibers. By selecting different alkaline source, CeO2/TiO2 heterostructures with CeO2 nanowalls or nanoparticles were facilely fabricated. The photocatalytic studies suggested that the CeO2/TiO2 heterostructures showed enhanced photocatalytic efficiency of photodegradation of dye pollutants compared with bare TiO2 nanofibers under UV light irradiation. © 2010 Elsevier Ltd. All rights reserved.


Cao T.,Northeast Normal University | Cao T.,Baicheng Teachers College | Li Y.,Northeast Normal University | Wang C.,Northeast Normal University | And 2 more authors.
Langmuir | Year: 2011

Heterostructured SrTiO3/TiO2 nanofibers were fabricated by in situ hydrothermal method using TiO2 nanofibers as both template and reactant. The as-fabricated heterostructures composite included SrTiO3 nanocubes or nanoparticles assembled uniformly on the surface of TiO2 nanofibers. Compared with the pure TiO2 nanofibers, SrTiO3/TiO2 nanofibers exhibited enhanced photocatalytic activity in the decomposition of Rhodamine B (RB) under ultraviolet light. The enhanced photocatalytic activity of SrTiO 3/TiO2 nanofibers could be attributed to the improvement of charge separation derived from the coupling effect of TiO2 and SrTiO3 nanocomposite. © 2011 American Chemical Society.


Zhang C.-H.,Northeast Normal University | Zhang C.-H.,Baicheng Teachers College | Zhang C.-J.,Northeast Normal University | Chen Y.-G.,Northeast Normal University
Solid State Sciences | Year: 2011

Two new compounds based on Anderson-type polyoxometalates and Zr 4+/Ce3+/1,2-diaminoethanetetraacetate complexes: Na 3[ZrEDTA(H2O)2]2[Cr(OH) 6Mo6O18]·10H2O (1) and [Ce3(HEDTA)2(H2O)9][Cr(OH) 6Mo6O18]·13H2O (2) (EDTA = 1,2-diaminoethanetetraacetate), have been conventionally synthesized and characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. In 1, each trinuclear Na+ cluster connects two [ZrEDTA(H2O)2] fragments forming {Na 3[ZrEDTA(H2O)2]2}3+ cations and at the same time further link four [Cr(OH)6Mo 6O18]3- anions to result in a 2D sheet. The hydrogen bonds between [ZrEDTA(H2O)2] fragments belonging to different sheets are the main force of constructing 3D architecture. In 2, the interaction of Ce and octa-dentated EDTA ligands creates a 2D [Ce 3(HEDTA)2(H2O)9]3+ coordination polymer sheets including big 12-numbered Ce rings and 4-numbered Ce rings. The polymer sheets interact with [Cr(OH)6Mo6O 18]3- anions by H-bonds forming a 3D supramolecular framework. © 2011 Elsevier Masson SAS. All rights reserved.


Wang W.,Northeast Normal University | Wang W.,Baicheng Teachers College | Xu L.,Northeast Normal University | Gao G.,Northeast Normal University | Liu X.,Northeast Normal University
Inorganic Chemistry Communications | Year: 2011

An unusual inorganic-organic hybrid based on β-Keggin polyanions and organic cations,[H4tpb]2.5[H2bpe] 2[SiMoVI 9MoV 3O 40]2 4H2O(1,tpb = 1,2,3,4-tetrakis-4-pyridinium butane), has been synthesized by hydrothermal method. Complex 1 demonstrates for the first time that the in situ multifunctional tpb ligand possesses chiral carbon atoms and thus opens a new route to the chiral synthesis by achiral precursor under environmentally benign conditions. © 2011 Elsevier B.V.


Zhang C.-H.,Northeast Normal University | Zhang C.-H.,Baicheng Teachers College | Zhang C.-J.,Northeast Normal University | Chen Y.-G.,Northeast Normal University | Liu S.-X.,Northeast Normal University
Inorganic Chemistry Communications | Year: 2011

A new three-dimensional (3D) hybrid compound [Cu4(EGTA) 2(H2O)4Cu2(H2O) 8][SiW12O40]•14H2O (1), [EGTA = ethyleneglycol-bis-(2-aminoethylether)-tetra acetic acid], was conventionally synthesized and characterized by elemental analysis, IR, TG, and single crystal X-ray diffraction. In 1, the square inorganic layers formed by the coordination of tungstosilicate anions to copper ions are supported by Cu4(EGTA) 2 metallamacrocyclic cations, giving a unique 3D framework with α-Po topology. Additionally, luminescent and magnetic properties of 1 are investigated in the solid state. © 2011 Elsevier B.V. All rights reserved.


Zhang C.-H.,Northeast Normal University | Zhang C.-H.,Baicheng Teachers College | Chen Y.-G.,Northeast Normal University | Tang Q.,Northeast Normal University | Liu S.-X.,Northeast Normal University
Dalton Transactions | Year: 2012

Six supramolecular compounds constructed by main group and transition metals, polyoxotungstates (SiW 12O 40 4-) and trans-N,N,N′,N′-1,2-cyclohexanediaminotetraacetic acid (H 4CyDTA), (NH 4) 3[Ni 4Na(H 2O) 10(CyDTA) 2][SiW 12O 40]·10H 2O (1) (NH 4) 2[Cu 3Na 2(HCyDTA) 2(H 2O) 13][SiW 12O 40]·5H 2O (2), (NH 4) 2[Zn 5(CyDTA) 2(H 2O) 16][SiW 12O 40]·8H 2O (3), (NH 4) 4[Cd 4(CyDTA) 2(H 2O) 8][SiW 12O 40] ·6H 2O (4), (NH 4) 4[Sr 3(HCyDTA) 2(H 2O) 14][SiW 12O 40] ·2H 2O (5) and [Ca 4(H 2CyDTA) 2(H 2O) 22][SiW 12O 40] ·8H 2O (6), were synthesized in aqueous solution and characterized by IR spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction techniques. Single-crystal structure analyses indicate they are constructed by the complexes with different nuclearity and polyoxometalates. In the sequence of Ni, Cu, Zn the nuclearity of the homometallic complex units increases from 2 to 5. Cadmium ions gives a tetranuclear complex with a compact structure. In 5 and 6 the main group metal ions and CyDTA form polymeric chains. CyDTA exhibits rather different coordination patterns to main group metal ions and transition metal ions due to their ionic radii and electronic configuration. The complex units and polyoxometalates arrange in different patterns due to the different shapes of the complex units. The compounds exhibit different thermal decomposition processes and the formation of compounds 3 and 4 quenches ligand-centered emissions and gives a ligand-to-metal emission. The study on various temperature susceptibilities of 1 and 2 shows that there is an antiferromagnetic coupling in the two compounds but coupling patterns are different. © 2012 The Royal Society of Chemistry.


Yang X.-D.,Northeast Normal University | Zhang C.-H.,Northeast Normal University | Zhang C.-H.,Baicheng Teachers College | Wang D.-P.,Northeast Normal University | And 2 more authors.
Inorganic Chemistry Communications | Year: 2010

Two new compounds based on [H2W12O40] 6- (W12) clusters and Ln-organic complexes, [Ln 3(Hdipic)(dipic)(H2O)13(H2W 12O40)]•13H2O Ln = Sm (1), Gd (2), (dipic = pyridine-2,6-dicarboxylate anion) have been synthesized and characterized by element analysis, IR spectrometry and thermogravimetric analysis. Single-crystal X-ray diffraction analyses reveal that compounds 1 and 2 are isostructural. In 1 and 2 four Ln3+ ions lie in a plane and form a centrosymmetric regular rhomblike ring {Ln4(dipic)2(Hdipic) 2(H2O)12}6+(Sm4-ring) through the ligands. The covalent combination of W12 subunits as a tetradentate ligand to Ln4-rings from two sides creates a polymeric anion, {[H2W12O40]2[Ln 4(dipic)2(Hdipic)2(H2O) 12]}6-, and then Ln1 ions connect these anions leading to the 2D layers. The magnetic measurements indicate that in 1 and 2 there exist very weak antiferromagnetic interactions. © 2010 Elsevier B.V. All rights reserved.


Zhang C.-H.,Northeast Normal University | Zhang C.-H.,Baicheng Teachers College | Chen Y.-G.,Northeast Normal University | Liu S.-X.,Northeast Normal University
Inorganic Chemistry Communications | Year: 2013

Reaction of Na2WO4·2H2O, GeO 2, Cu(Ac)2·H2O and H4EGTA in conventional conditions results in formation of a new compound, (H 3O)4Cu(H2O)6[K6(H 2O)17Cu2(EGTA)(H2O) 2{Cu4(H2O)2(B-α-GeW 9O34)2}]·9H2O (1) (EGTA = ethyleneglycol-bis-(2-aminoethylether)-N,N,N′,N′-tetraacetate tetraanion). Its crystal structure was determined with X-ray diffraction method. The in situ synthesized [Cu4(H2O)2(B-α- GeW9O34)2]12 - has the typical Weakley sandwich structure and acts as an eleven-dentate ligand linking nine K+ ions and two Cu2 + ions. All Cu2 + ions are in an elongated octahedral environment. Two Cu2 + ions are chelated by EGTA from two ends and coordinated by terminal oxygen atoms of [Cu 4(H2O)2(B-α-GeW9O 34)2]12 -, forming a chain CuEGTA-Cu 4(H2O)2(GeW9O34) 2. K+ ions connect the chains into a complicated three dimensional framework. The magnetic measurement shows that 1 exhibits antiferromagnetic property. © 2012 Elsevier B.V.

Loading Baicheng Teachers College collaborators
Loading Baicheng Teachers College collaborators