Abstract:The synthesis, structure and magnetic properties are reported of two disk-like mixed-valence cobalt clusters [CoIIICoII6(thmp)2(acac)6(ada)3] (1) and [CoIII2CoII11(thmp)4(Me3CCOO)4(acac)6(OH)4(H2O)4](Me3CCOO)2.H2O (2). Heptanuclear complex 1 was prepared by solvothermal reaction of cobalt(II) acetylacetonate (Co(acac)2), 1,1,1-tris(hydroxymethyl)-propane (H3thmp), and adamantane-1-carboxylic acid (Hada), whereas by substituting Hada with (CH3)3CCO2H, tridecanuclear complex 2 was obtained with an unexpected [CoIII2CoII11] core. The core structures of 1 and 2 are related to each other: that of 1 arrange as a centered hexagon of a central CoIII ion surrounded by a [CoII6] hexagon, while that of 2 can be described as a larger oligomer based on two vertex sharing [CoIIICoII6]. Variable-temperature direct current (dc) magnetic susceptibility measurements demonstrated overall ferromagnetic coupling between the CoII ions within both two clusters. The magnetic exchange (J) and magnetic anisotropy (D) was quantified with appropriate spin Hamiltonians models and also supported by DFT calculations. The presence of frequency-dependent out-of-phase ac susceptibility signals at temperatures below 3 K suggested that 2 might be a single-molecule magnet.

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	1. Disk-like Hepta- and Tridecanuclear Cobalt Clusters. Synthesis, Structure, Magnetic Properties and DFT calculations
	Ji-Dong Leng,Su-Kun Xing,Radovan Herchel,Ming-Liang Tong
	Chemistry 31 December 2013
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	Abstract:The synthesis, structure and magnetic properties are reported of two disk-like mixed-valence cobalt clusters [CoIIICoII6(thmp)2(acac)6(ada)3] (1) and [CoIII2CoII11(thmp)4(Me3CCOO)4(acac)6(OH)4(H2O)4](Me3CCOO)2.H2O (2). Heptanuclear complex 1 was prepared by solvothermal reaction of cobalt(II) acetylacetonate (Co(acac)2), 1,1,1-tris(hydroxymethyl)-propane (H3thmp), and adamantane-1-carboxylic acid (Hada), whereas by substituting Hada with (CH3)3CCO2H, tridecanuclear complex 2 was obtained with an unexpected [CoIII2CoII11] core. The core structures of 1 and 2 are related to each other: that of 1 arrange as a centered hexagon of a central CoIII ion surrounded by a [CoII6] hexagon, while that of 2 can be described as a larger oligomer based on two vertex sharing [CoIIICoII6]. Variable-temperature direct current (dc) magnetic susceptibility measurements demonstrated overall ferromagnetic coupling between the CoII ions within both two clusters. The magnetic exchange (J) and magnetic anisotropy (D) was quantified with appropriate spin Hamiltonians models and also supported by DFT calculations. The presence of frequency-dependent out-of-phase ac susceptibility signals at temperatures below 3 K suggested that 2 might be a single-molecule magnet.
	TO cite this article:Ji-Dong Leng,Su-Kun Xing,Radovan Herchel, et al. Disk-like Hepta- and Tridecanuclear Cobalt Clusters. Synthesis, Structure, Magnetic Properties and DFT calculations[OL].[31 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4578447


	2. In-situ Reduction Synthesis of Cu2O Quantum Dots Modifying g-C3N4 for Enhanced Photocatalytic Hydrogen Production
	CHEN Jie,SEHN Shaohua
	Chemistry 24 October 2013
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	Abstract:In this paper, Cu2O quantum dots (QDs) were directly formed on g-C3N4 via a one-pot in-situ reduction method. The physical and photophysical properties of these Cu2O QDs modified g-C3N4 photocatalysts were characterized to investigate the effects of Cu2O QDs on the photocatalytic activities of g-C3N4. Close contact was formed between Cu2O and g-C3N4 and the Cu2O QDs were well dispersed on g-C3N4. The visible light photocatalytic hydrogen production activity over g-C3N4 was enhanced by more than 70% with the Cu2O QDs modification. The photocatalytic mechanism analysis revealed that the close contact, efficient visible light absorption and Type II band alignment induced charge separation by Cu2O QDs modification should be the key factors for the improved photocatalytic performance.
	TO cite this article:CHEN Jie,SEHN Shaohua. In-situ Reduction Synthesis of Cu2O Quantum Dots Modifying g-C3N4 for Enhanced Photocatalytic Hydrogen Production[OL].[24 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4565713

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	3. Crystal Transformation and Visible light Driven Photocatalytic Activities of Vanadium doped Bismuth Oxide
	YIN Lifeng,Bo Fusheng,Dai Yunrong
	Chemistry 16 October 2013
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	Abstract:The doping of bismuth oxide with vanadium yielded a series of photocatalysts with visible light responsive ability, including bismuth subcarbonate (Bi2O2CO3), monoclinic bismuth vanadate (BiVO4), bismuth oxides, cubic bismuth vanadate (Bi12.38V0.62O20.12) and their co-crystalline under the different anneal temperatures. It is suggested that vanadium doping in the lattice of bismuth oxide results in the crystalline transformation. Among them, the mixture of cubic bismuth oxide and bismuth vanadate presented the highest degradation efficiency (98.5%) for 4-chlorophenol, a widespread environmental pollutant, under visible light and sunlight irradiation. The degradation mechanism was ascribed to the photocatalytic reduction by the photo-generated electron.
	TO cite this article:YIN Lifeng,Bo Fusheng,Dai Yunrong. Crystal Transformation and Visible light Driven Photocatalytic Activities of Vanadium doped Bismuth Oxide[OL].[16 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4564373


	4. Electrical Properties of Ce0.8Sm0.2O1.9 with the Addition of Li2O as Sinter Aid
	Shengcai Zhu,Shiru Le,Kening Sun
	Chemistry 14 May 2013
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	Abstract:Improving the densification and electrochemical performance of Sm0.2Ce0.8O1.9 (SDC) is essential for its widely application in the intermediate temperature solid oxide fuel cells (IT-SOFCs). Introducing a small amount of Li2O into the SDC as sintering aid can enormously decrease the densification temperature from 1500 ℃ to 900 ℃ and increase its relative density. The electrical conductivities increased from 0.017 Socm-1 for SDC-0 to 0.026 Socm-1 for SDC-2 at 600 ℃. This is contributed to the enrichment of Li+ on the grain boundary, which enhanced grain boundary conductivity. However, excessive Li2O addition will reduce the conductivities at temperature higher than 800 ℃, because the melted Li2O layer restrained the oxygen ionic transfer. The activation energy for electrochemical conductivity decreases from 0.78 eV for SDC-0 to 0.75 eV for SDC-5.
	TO cite this article:Shengcai Zhu,Shiru Le,Kening Sun. Electrical Properties of Ce0.8Sm0.2O1.9 with the Addition of Li2O as Sinter Aid[OL].[14 May 2013] http://en.paper.edu.cn/en_releasepaper/content/4543303


	5. Sub-Millimeter Free-Suspended Sheets Formed by Polyelectrolytes with Multivalent Counterions
	LIU Nijuan,BU Weifeng
	Chemistry 09 April 2013
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	Abstract:Here, we report the preparation of polyoxometalate-based free-suspended sheets with a sub-millimeter plan-view size and a nanoscale thickness by the electrostatic self-assembly of cationic polyelectrolytes with polyoxometalate in aqueous solution. This method is further extended to prepare the dye-functionalized free-suspended sheets with a larger planar size and a thinner thickness. The controlled preparation of the giant free-suspended sheets represents a new strategy for the design of two-dimensional materials with integrated functions such as nanoseparation and electro-optics.
	TO cite this article:LIU Nijuan,BU Weifeng. Sub-Millimeter Free-Suspended Sheets Formed by Polyelectrolytes with Multivalent Counterions[OL].[ 9 April 2013] http://en.paper.edu.cn/en_releasepaper/content/4536946


	6. Fabrication of a Highly Robust Polymer Superhydrophobic Surfaces By Replica-Molding Method
	REN Qingwei,GU Guangsheng,GUO Chaowei
	Chemistry 06 March 2013
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	Abstract:We report a facile method to fabricate a highly robust polymer superhydrophobic surfaces by a molding and dip-coating method. The casting material is elastomeric and structure-memorizing, showing robustness against compressing, folding, curling, and stretching. It can bear compressive pressure up to 20 MPa with no defects emerging. The fabricating method is simple, low-cost, harmless, but highly repeatable and resulting in outstanding superhydrophobicity with multi-scale roughness.
	TO cite this article:REN Qingwei,GU Guangsheng,GUO Chaowei. Fabrication of a Highly Robust Polymer Superhydrophobic Surfaces By Replica-Molding Method[OL].[ 6 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4522903


	7. A Theoretical Study on the Vibrational Spectra and Thermodynamic Properties for the Derivatives of HNS with -CH3, -N3, and -NF2 Groups
	WANG Guixiang,GONG Xuedong,XIAO Heming
	Chemistry 05 February 2013
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	Abstract:The derivatives of HNS are optimized to obtain their molecular geometries and electronic structures at the DFT-B3LYP/ 6-31G* level. Their IR spectra are obtained and assigned by vibrational analysis. Compared with the experimental results, all the calculated IR data are found to be reliable. Based on the frequencies scaled by 0.96 and the principle of statistic thermodynamics, the thermodynamic properties are evaluated, which are respectively linearly related with the number of methyl, azido and difluoramino groups as well as the temperature, obviously showing good group additivity.
	TO cite this article:WANG Guixiang,GONG Xuedong,XIAO Heming. A Theoretical Study on the Vibrational Spectra and Thermodynamic Properties for the Derivatives of HNS with -CH3, -N3, and -NF2 Groups[OL].[ 5 February 2013] http://en.paper.edu.cn/en_releasepaper/content/4518304


	8. Scraping-Induced Superhydrophobicity on Polymer Surfaces: Experiment and Lattice Boltzmann Simulation
	GUO Chaowei,REN Qingwei
	Chemistry 24 December 2012
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	Abstract:We report a scraping-induced surface modification method to produce superhydrophobicity. The proposed method allows easy large-scale manufacturing of surface superhydrophobicity. Experimental contact angles on seven polymer surfaces were reported. The largest water contact angle was found to be 160.0 on manufactured rough PTFE surfaces. Numerical simulations by means of a lattice Boltzmann method were also performed to examine the effect of trapped air on the wettability or superhydrophobicity. We found that contact angle increases with the amount of trapped air at the solid-liquid interface, in general agreement with experimental results.
	TO cite this article:GUO Chaowei,REN Qingwei. Scraping-Induced Superhydrophobicity on Polymer Surfaces: Experiment and Lattice Boltzmann Simulation[OL].[24 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4508323


	9. Highly Efficient and Stable Cu/ZnO/Al2O3 Catalyst for Glycerol Hydrolysis
	CUI Yuanyuan,Guo Xiuying,Yang Xinli,Yin Anyuan,Dai Weilin
	Chemistry 18 December 2012
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	Abstract:Highly dispersed copper nanoparticles supported on Al2O3 are successfully prepared via the facial co-precipitation method. The addition of appropriate amount of ZnO is beneficial to the formation of highly dispersed copper species on the surface of Cu/ZnO/Al2O3 samples. The Cu/ZnO/Al2O3 (4/2/4) catalyst which does not need the reduction pretreatment shows much higher activity compared with those catalysts commonly used for this reaction. A high glycerol conversion (92.5%), with 99.0% selectivity to 1,2-propanediol was obtained under mild reaction conditions (453 K, 3 MPa initial H2 pressure).
	TO cite this article:CUI Yuanyuan,Guo Xiuying,Yang Xinli, et al. Highly Efficient and Stable Cu/ZnO/Al2O3 Catalyst for Glycerol Hydrolysis[OL].[18 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4503415


	10. Determination of thermokinetic parameters of benzylpenicillin hydrolysis with metallo-β-lactamase CcrA from Bacteroides fragilis
	Zhou Lisheng,Zhai Le,Liu Chengcheng,Shi Ying,Zhou Yajun,Yang Kewu
	Chemistry 24 July 2012
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	Abstract:In this paper, we report the thermokinetic parameters of benzylpenicillin (as the representative of penicillins) hydrolysis with the B1 subclasses MβL CcrA from Bacteroides fragilis. The activation free energy are 87.90±0.03, 88.99±0.01, 89.93±0.04 and 90.93±0.05 kJomol-1 at 293.15, 298.15, 303.15 and 308.15 K. Activation enthalpy is 29.21±0.03 kJomol-1, activation entropy is -200.34±0.08 Jomol-1oK-1, the reaction order is 1.4, and the apparent activation energy E is 31.71 kJomol-1. The summarized thermokinetic data indicated that CcrA prefer to hydrolyze penicillins among three kinds of β-lactam containing antibiotics.
	TO cite this article:Zhou Lisheng,Zhai Le,Liu Chengcheng, et al. Determination of thermokinetic parameters of benzylpenicillin hydrolysis with metallo-β-lactamase CcrA from Bacteroides fragilis[OL].[24 July 2012] http://en.paper.edu.cn/en_releasepaper/content/4485582

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