Synthesis and Crystal Structure of a New 2D Honeycomb-like Cadmium(II) Complex with Tripodal Ligand

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Au/CeO2/Y和Au-MFe2O4催化剂用于有氧条件下CH4还原NOx的研究

以CeO2／Y分子筛和MFe2O4(M=Ni,Co，Zn)为载体，制备Au／CeO2／Y和Au-MFe2O4负载型金催化剂．用CH4做还原剂，考察了它们在有氧条件下催化还原NOχ的活性．结果表明：在Au-Y中引人助剂Ce，使得Au／CeO2／Y的催化活性高于Au／Y；Au-CoFe2O4的催化活性高于Au-Fe2O3，反应温度为300℃时，NOχ在Au-CoFe2O4上的转化率达到39．70%．     

低共熔混合锂盐相图的绘制及应用

采用热分析法对不同组成的混合锂盐二元体系进行研究, 绘制了混合锂盐体系的步冷曲线和T-x相图, 结果表明体系均为具有最低共熔点的二元体系. LiOH-LiNO3、LiOH-LiCl、LiOH-Li2CO3及LiNO3-LiCl体系的最低共熔点分别为175.7、294.5、418.2及221.6 ℃. 利用低共熔混合物LiNO3-LiOH为锂盐与不同前驱体反应, 制备出了层状结构良好的锂离子电池正极材料LiNiO2、LiNi0.8Co0.2O2及LiNi1/3Co1/3Mn1/3O2. X射线衍射分析表明, 合成的材料具有规整的层状NaFeO2结构, 且XRD衍射峰强度之比I(003)/I(104)>2.0, 电性能测试表明, 在2.7-4.3 V(vs Li/Li+)的电压范围内进行0.1C倍率充放电, LiNiO2、LiNi0.8Co0.2O2、LiNi1/3Co1/3Mn1/3O2首次充电比容量分别达168.0、225.4、194.0 mAh·g-1, 放电比容量分别为138.4、165.8、157.7 mAh·g-1.     

A NEW KIND OF FIBER-SPUN FROM POLYSULFONAMIDE/ZINC SOLUTION

In this paper, we succeed in fabricating high-temperature fiber of polysulfonamide/ZnO. Polysulfonamide/ZnO nanocomposite was prepared by in-situ polymerization. Some studies and characterization of Polysulfonamide/ Zinc oxide nanocomposite with ZnO 0.5% have been done. It includes ηr,, Crystal degree and thermal property. Experiment＇s results showed that, ZnO as filler can improve crystal degree of polysulfonamide fiber. The crystal degree has been bnproved, from lower than 20% up to 27%. ηr of polysulfonamide/ Zinc oxide nanocomposite solution with ZnO 0.5% is 2.03. The maxinum weight loss of the nanocomposite occurred at 453.5 ℃.     

Synthesis and Structural Characterization of 1,4-Di（2-methoxyphenyl）-2,5-piperazinedione

A new derivative of 2,5-piperazinedione, 1,4-di（2-methoxyphenyl）-2,5-piperazinedione （I）, was synthesized by the cyclocondensation reaction of N-2-methoxyphenyl chloroacetamide, and its structure was characterized by elemental analysis, IR, ^1H NMR and single crystal X-ray diffraction method. The crystal belongs to monoclinic system, space group P21/c with unit cell dimensions a=0.56934（10） nm, b=1.3880（2） nm, c=1.00329（17） nm, β= 90.376（3）°, V= 0.7928（2） nm^3, Z=2, Dc = 1.367 g·cm^-3,μ = 0.98 cm^-1, R and wR being 0.0606 and 0.1564 respectively for 1549 unique reflections with 1247 observed reflections [I〉2σ（I）]. The molecule has a crystallographically imposed symmetry center. The three rings in the molecule are each coplanar with their attached groups, excluding methyl H atoms and the H atoms attached to the piperazinedione ring, while the whole molecule is not planar, with dihedral angles of 74.7（1）° between the piperazinedione and each of the two aromatic rings. The crystal structure is stabilized by van der Waals and dipole-dipole forces.     

乙酰化淀粉的塑化和性能研究

以乙酰化改性淀粉为基体,甘油为增塑剂,利用哈克旋转流变仪密炼制备热塑性乙酰化淀粉.实验结果表明制备热塑性乙酰化淀粉的甘油/乙酰化淀粉配比应大于30/100(W/W),且随甘油含量增加,热塑性乙酰化淀粉的脆性降低.动态机械热分析(DMTA)显示热塑性乙酰化淀粉包含富甘油和富淀粉两相,乙酰化淀粉和甘油为部分互溶.流变学分析显示淀粉分子间作用力非常强,表现为类固态行为.同时本文对材料的热稳定性进行了初步研究.     

具可调光学性质的富勒烯聚合物

聚（Ｃ６０ 甲基丙烯酸甲酯）与聚（Ｃ６０ 苯乙烯）的ＴＨＦ溶液的透射光谱随浓度的增大而不断红移．这种异常的光谱位移可能与富勒烯的纳级（１０－９）簇的形成有关．用简单的办法来“调改”一物质的性质是科学家们长期梦寐以求的，而含Ｃ６０的聚合物正代表了这一群新奇的物质，它们的光学性质可以预期地和可逆地调变，只要简单改变一下浓度．     

INFLUENCE OF BACKBONE RIGIDITY ON THE LIQUID CRYSTALLINITY OF MESOGEN-CONTAINING POLYACETYLENES

Two acetylene polymers containing cyanobiphenyl-based mesogens,poly { 10-[ ((4'- cyano-4-biphenylyl ) oxy ) carbonyl] - 1 -decyne } (PA8CN ), which has a relativelyfiexible polyalkyne backbone, and poly {[4-(((12-((4'-cyano-4-biphenylyl)oxy)dodecyl)oxy)carbonyl) phenyl]-acetylene} (PB12CN), which has a fairly rigid poly (phenylacetylene )backbone, were synthesized using respectively WCl_6 and [Rh(nbd)Cl]_2 as the catalysts.PA8CN exhibits enantiotropic interdigitated smectic A phase (S_(Ad)) over a temperaturerange as wide as ca. 100℃, whereas PB12CN is non-mesomorphic, demonstrating thatthe backbone rigidity plays an important role in determining the liquid crystallinity of thepolyacetylenes.     

邻苯二酚与乙醇单醚化反应用固体酸催化剂表面上的积炭行为

 研究了邻苯二酚与乙醇气固相单醚化反应用固体酸催化剂表面上的积炭行为，并用TG－DTA，BET，GC－MS，FT－IR和元素分析等手段对积炭物种进行了表征．结果表明，催化剂上有两种类型的积炭，一类属可溶性积炭，主要由二苯醚及其衍生物组成，可在低温燃烧除去；另一类属不可溶性积炭，主要为缺氢的芳烃类聚合物或类石墨碳，需在高温下才能烧除．积炭主要发生在4～8nm范围的中孔内，导致反应后的催化剂大孔范围的孔分布所占的分数增大．随着反应的进行，总积炭量逐渐增多．     

双-单齿芳香酰胺型配体桥联La3＋一维配位聚合物的合成与晶体结构

通过硝酸镧和双-单齿芳香酰胺型配体L {L＝1,4-双[(2'-苄胺甲酰基苯氧基)-甲基]苯}之间的反应得到了配位聚合物{[La(NO₃)₃]₂•L₃}_n, 并用X射线单晶衍射测定了配合物的晶体结构. 配合物为三斜晶系, _P1空间群, 晶胞参数a＝1.1298(2) nm, b＝1.2689(1) nm, c＝2.1030(3) nm, α＝81.189(9)°, β＝80.95(1)°, γ＝65.832(9)°, V＝2.7032(6) nm³, Z＝2, R＝0.0267, wR＝0.0679, La^3＋为9配位, 呈变形的三帽三角棱柱配位构型. 配合物通过配体的桥联作用形成一维环链相间的配位聚合结构, 由于相邻链间不存在氢键和π-π堆积作用, 所以配合物是以单链形式堆积排列.