Simple Combustion Production and Characterization of Octahydro[60]fullerene with a Non-IPR C-60 Cage

1. Xiamen Univ, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 3. Xiamen Univ, Sch Life Sci, Xiamen 361005, Peoples R ChinaFor the first time an easier, operable combustion method is employed for the synthesis of non-IPR fullerene, and an octahydro[60)fullerene with a non-IPA C-60 cage (C-60 isomer C-#1809(60)) produced by combustion is isolated and characterized by MS, UV vis, IR, and NMR spectroscopies in combination with DFT calculations. This finding shows that, in addition to chlorine, hydrogen can be an ample cataloreactant for the production of non-IPR fullerene derivatives under such conditions as arc-burning and diffusion combustion.NSFC 20525103 20673088 20973137 20721001 20423002 21031004 973 projects 2007CB815301 2007CB81530

Combustion Synthesis and Electrochemical Properties of the Small Hydrofullerene C50H10

通讯作者地址: Xie, SY (通讯作者),Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 2. Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China 3. Xiamen Univ, Sch Life Sci, Xiamen 361005, Peoples R China 电子邮件地址: [email protected]; [email protected] hydrofullerene C50H10 is synthesized by low-pressure benzeneoxygen diffusion combustion. The structure of C50H10 is identified through NMR, mass spectrometry, and IR and Raman spectroscopy as a D5h symmetric closed-cage molecule with five pairs of fused pentagons stabilized by ten hydrogen atoms. UV/Vis and fluorescence spectrometric analyses disclose its optical properties as comparable with those of its chloride cousin (C50Cl10). Cyclic and square-wave voltammograms reveal that the first reduction potential of C50H10 is more negative than that of C50Cl10 as well as C60, with implications for the utilization of C50H10 as a promising electron acceptor for photovoltaic applications.973 projects 2011CB935901 NSFC 21031004 21021061 2077310

Two I-h-symmetry-breaking C-60 isomers stabilized by chlorination

通讯作者地址: Xie, SY (通讯作者), Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 2. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] abiding surprise in fullerene science is that I-h-symmetric buckminsterfullerene C-60 (ref. 1) (I-h-C-60 or C-#1,812(60), the nomenclature specified by symmetry or by Fowler's spiral algorithm(2)) remains the sole C-60 species experimentally available. Setting it apart from the other 1,811 topological isomers (isobuckminsterfullerenes) is its exclusive conformity with the isolated-pentagon rule(3), which states that stable fullerenes have isolated pentagons. Although gas-phase existence of isobuckminsterfullerenes has long been suspected(4-7), synthetic efforts have yet to yield successful results. Here, we report the realization of two isobuckminsterfullerenes by means of chlorination of the respective C-2v-and C-s-symmetric C-60 cages. These chlorinated species, (C60Cl8)-C-#1,809(1) and (C60Cl12)-C-#1,804(2), were isolated in experimentally useful yields. Structural characterization by crystallography unambiguously established the unique pentagon-pentagon ring fusions. These distinct structural features are directly responsible for the regioselectivity observed in subsequent substitution of chlorines, and also render these unprecedented derivatives of C60 isomers important for resolving the long-standing puzzle of fullerene formation by the Stone-Wales transformation scheme(8-11).NNSF of China,20525103 ,20531050 ,20721001 , 20571062 ,20425312 973 Program 2007CB81530

Determination of Trace-amounts of Chloride ion in Acidic-Copper Plating Solution by Ion Chromatography

采用碳酸钡沉淀法去除酸性镀铜液中 SO42 -、Cu2 + 的干扰 ,建立用离子色谱法检测酸性镀铜液中微量氯离子的测定方法 ,在实际检测中表明该方法灵敏度高 ,结果准确In this paper, the quantitative method for trace amounts of chloride ion in acidiccopper plating solution by ion chromatography is described. The acidiccopper plating solution contains large amounts of SO 4 2- and Cu 2+ , and trace amounts of chloride ion and so on. To minimize the interfering by sulfate ion and to avoid the damage to anionseparator column by copper ion, a pretreatment using barium carbonate as precipitator is required. Samples were separated completely by this system. The experiment results indicate that the pretreatment method is successful and determination for chloride ion is sensitive and accurate.福建省自然科学基金资助项目!(D990 001);; 厦门大学自选课题基金资助项

大城市郊区农户要素投入特征及差异分析——以北京市平谷区为例

农户生产要素投入的方向和强度不仅反映了农户的经济行为特征,也在一定程度上决定了区域农业的发展方向。本文以北京市平谷区2003年的116个农户调查问卷为基础,对大城市郊区农户生产要素投入特征及其差异进行了分析。结果表明,由于预期收益不同,农户在各产业的劳动力投入数量、质量、物质投入水平和组合结构具有很大差异。在劳动力质量和数量投入方面,根据建立的劳动力质量投入模型进行计算,平谷区农户劳动力质量投入水平非农产业要高于农业产业,经济作物要高于大田作物,具体从高到低的顺序依次是非农产业、其他经济作物、畜牧业、菜地、果园、大田作物,同时劳动力从农业向非农产业、在农业内部从大田作物向经济作物转移的趋势明显;在农户物质投入水平和组合结构方面,资本投入水平从高到低的顺序是:果园、菜地、大田,要素投入组合结构从好到差的顺序是:菜地、果园、大田,两个排序中经济作物都要高于或好于大田作物。分析认为稳定市场预期对于大城市郊区农业的健康发展具有十分重要的意义

Survey and Analysis on Corrosion Events in Several Important Fields at Coastal City Yantai

In view of serious corrosion in typical coastal cities, taking Yantai as an example, we made a corrosion survey concerning the corrosion status of 40 bridges, 3 ports and wharfs, 12 municipal pipe network units, 13 industrial enterprises and 20 tourism and entertainment units in the city of Yantai by means of questionnaire survey and field survey. The data related with corrosion and protection status of 88 investigation objects were obtained, and it was found that the corrosion events were serious in various industrial fields of Yantai. The general status of corrosion issue in the city is seriously that, reinforced concrete structures all suffered from corrosion of diversified types, such as surface voids and pits, cracks, rust spots, exposed reinforcing bars, corrosion cracking and so on. Steel structures also suffered from corrosion of different severities, such as damages or thinning of protective coatings and corrosion induced leakage points etc. With the Hoar method, the annual corrosion cost of Yantai city was estimated to be 2,354,336.4 ten-thousand RMB, accounting for 3.9% of the national gross domestic product.</p

Influence of Crystallinity on the Kinetics of Li Ion Insertation and Deinsertation in Spinel LiMn_(2)O_(4)

应用溶胶-凝胶法制备两种结晶度尖晶石锂锰氧化物.X射线衍射(XRD)、电感耦合等离子体原子发射光谱(ICP)、扫描电镜(SEM)、恒电流充放电、循环伏安(CV)和交流阻抗谱(EIS)等方法测试表明:以较高温度焙烧制得的L iMn2O4样品结晶度较高,但结晶度较低的样品却具有较高的放电容量和较好的循环稳定性,这主要是结晶度较低的样品具有较快的电荷交换速率和锂离子扩散速率.Two spinel lithium manganese oxides of different crystallinity were prepared by sol-gel process and were studied by using inducfively coupled plasma,X-ray diffraction,scaning electron micrographs,constant charging and discharging,cyclic voltammetry and electrochemical impedance spectrometry,the results show that the sample treated under 700 ℃ has higher crystallinity than the sample treated under 500 ℃,however,the sample with lower crystallinity has higher discharge capacity and better cyclic performance that due to quicker charge exchange speed and quicker diffusion speed of Li-ion.作者联系地址：华南师范大学化学与环境学院,华南师范大学化学与环境学院,华南师范大学化学与环境学院 广东广州510006,广东广州510006,广东广州510006Author's Address: School of Chemistry and Environment,South China Normal University,Guangzhou 510006,Guangdong,Chin