海报poster模板英文PPT学习教案

1、会计学1 海报海报poster模板英文模板英文 Introduction The design and synthesis of novel transition- metal-substituted polyoxometalate (TMSP) clusters based on the classical lacunary Keggin or Dawson fragments have raised extreme interest due to their structural varieties and unexpected properties,which gives rise to

2、 potential applications in magnetism, material sciences,catalysis,and biomedicine.Three novel hexa-Ni-substituted Dawson phosphortungstateshave been made under hydrothermal conditions and were characterized by IR spectroscopy, elemental analysis, diffuse reflectance spectroscopy, thermogravimetric a

3、nalysis, powder X-ray diffraction, and single-crystal X-ray diffraction. (1)Ni6(en)3(H2O)6(OH)3(H3P2W15O56)14H2O (2)Ni(enMe)2(H2O)Ni6(enMe)3(OH)3(H2O)6(H P2W15O56)10H2O (3)Ni(enMe)23Ni(enMe)2(H2O)Ni(enMe)(H2 O)2Ni6(enMe)3(OH)3(Ac)2(H2O)(P2W15O56)26 H2O Hydrothermal Combination of Trilacunary Dawson

4、Phosphotungstates and Hexanickel Clusters: From an Isolated Cluster to a 3D Framework Xin-Xiong Li,aWei-Hui Fang,aJun-Wei Zhao,*band Guo-Yu Yang*a, c Fujian Institute of Research on the Structure of Matter Chem. Eur. J. 2014, 20,110 Synthesis of compound 2,3 1 Synthesis of compound 1 Structure of co

5、mpound 1,2 figure1: en=ethylenediamine, enMe=1,2- diaminopropane, Ac=CH COO- Color codes: WO6 :red, PO4 :yellow, NiO6/NiO2N2(H2O)2 :green figure1 figure2 figure2: a) View of the stacking fashion of Dawson polyanions in 1 along the a axis; b) View of the stacking fashion of Dawson polyanions in 2 alo

6、ng the c axis. Structure of compound 3 figure3: The neighboring chains wereinter linked by Ni(enMe)22+bridges to from a 2D layer(d) Color codes: WO6 =red, NiO6 and NiO4N2:green, PO4 =yellow figure 3 figure4 Figure 4: Temperature dependence of the molar magnetic susceptibility and the product of the

7、molar magnetic susceptibility and the temperature for compound 3 between 2.0 and 300 K. TG curve For compounds 13, the good accordance between the experimental and simulated powder XRD patterns indicates the good phase purity of the samples. Conclusion This study provides not only a valuable molecul

8、ar model of the “CoPi” catalysts with a well-defined structure but also an unprecedented opportunity to fine-tune high- nuclearity POM clusters for visible light-driven watersplitting. Their photocatalytic water oxidation activities have been systematically investigated and showed that 14 are all ef

9、fective molecular catalysts and the photocatalytic performance is 3 1 4 2 under visible light irradiation. As 14 are a series of Si-centered, Ge-centered, P-centered, and As- centered POMs with analogous structure, the comparison of the catalytic activity among 14 for water oxidation provides valuable insight into the influence of heteroatoms on oxygen evolution as well as the further design and synthesis of more stable and efficient WOCs. Multiple experiments collectively confirmed that c