Synthesis and Crystal Structure of a Two-dimensional Coordination Polymer Constructed by Thiophene-2,5-dicarboxylic Acid and 1,4-Bis(imidazol-1-yl)-butane

<正>A metal-organic coordination polymer [Cd(tdc)(bimb)(μ_2-H_2O)]n (H_2tdc = thiophe- ne-2,5-dicarboxylic acid, bimb = 1,4-bis(imidazol-1-yl)-butane) 1 has been hydrothermally synthe- sized and characterized by elemental analysis, IR, TG, luminescence spectrum and single-crystal X-ray diffraction. Colorless crystals crystallize in the triclinic system, space group P_1~- with a = 5.8945(3), b = 10.3129(5), c = 11.2226(5), α = 95.1430(10), β = 97.9020(10), γ = 90.5910(10)°, V = 672.84(6) ~3, C_(11)H_(11)CdN_2O_5S, M_r = 395.68, D_c = 1.953 g/cm~3, μ(MoKα) = 1.797 mm~(-1), F(000) = 390, Z = 2, the final R = 0.0209 and wR = 0.0508 for 2514 observed reflections (I > 2σ(I)). The structure of 1 exhibits a two-dimensional layer-like structure.     

Synthesis, Crystal Structure and Luminescent Property of a One-dimensional Zinc（Ⅱ） Complex

A metal-organic coordination polymer [Zn2(cbba)4(bix)2]n·nH2O (Hcbba = 2-(4′- chlorine-benzoyl)-benzoic acid, bix = 1,4-bis(imidazol-1-ylmethyl)-benzene) 1 has been hydrothermally synthesized and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. Pale yellow crystals crystallize in the triclinic system, space group Pī, a = 10.2796(13), b = 17.636(2), c = 23.237(3), α = 105.046(2), β = 102.534(2), γ = 100.758(2)o, V = 3837.0(9)3, C84H59Cl4N8O13Zn2, Mr = 1660.93, Dc = 1.438 g/cm3, F(000) = 1702, Z = 2, μ(MoKα) = 0.835 mm-1, the final R = 0.0525 and wR = 0.1211 for 9129 observed reflections (I > 2σ(I)). The structure of 1 exhibits a one-dimensional chain-like structure and shows yellow luminescent property at room temperature.     

Gold Nanomaterials: Preparation,Chemical Modification,Biomedical Applications and Potential Risk Assessment

Gold nanomaterials (Au NMs) have attracted increasing attention in biomedicine due to their facile preparation, multifunctional modifications, unique optical and electrical properties, and good biocompatibility. The physicochemical properties of Au NMs at nanoscale, like size, shape, surface chemistry, and near field effects, are rendering Au NMs potent candidates in biomedicine. Thus, risk assessment of negative effects of Au NMs on biological systems is becoming urgent and necessary for future applications. In this review, we summarize up-to-date progresses on the preparation and modification of Au NMs and their biomedical applications, including biosensor, bioimaging and phototherapy, gene/drug delivery. Finally, we discuss the potential risk of Au NMs to biological systems, which is instructive for rationally designing and preparing nanomaterials for safe applications in nanomedicine.     

两个由2-(4′-氯-苯甲酰基)苯甲酸构筑的铜、锌配合物的合成及晶体结构

通过水热法合成了2个新的配合物Cu2(cbba)4(phen)2(1)和Zn(cbba)2(bipy)(2)(Hcbba=2-(4′-氯-苯甲酰基)苯甲酸,phen=1,10-邻菲罗啉,bipy=2,2′-联吡啶),并对其进行了元素分析、红外光谱、热重和X-射线单晶衍射测定。这2个配合物通过π-π相互作用形成了三维超分子网状结构。此外,还研究了配合物2的荧光性质。     

基于1-丁基苯并咪唑和对苯二甲酸混合配体的锌(Ⅱ)和铜(Ⅱ)一维配位聚合物:晶体结构和弱相互作用(英文)

用1-丁基苯并咪唑和对苯二甲酸与Zn(NO3)2.6H2O或Cu(NO3)2.3H2O反应合成了两个锌(Ⅱ)和钴(Ⅱ)的一维配位聚合物[Zn(L)2(TP)]n(1)和[Cu(L)2(TP)]n(2)(L=1-丁基苯并咪唑,TP=对苯二甲酸根)。配位聚合物1和2通过C-H…O或O-H…O氢键形成了二维超分子层。测定了L,1和2的荧光发射光谱。     

由吡嗪二甲酸及双咪唑基配体构筑的锌配位聚合物的合成、晶体结构及荧光性质

通过水热法合成了一个新的金属-有机配位聚合物[Zn(pzdc)(bix)0.5(H2O)]n(1)(H2pzdc=吡嗪-2,3-二甲酸,bix=1,4-双(咪唑基1-甲基)-苯)。并对其进行了元素分析、红外光谱、紫外光谱和X-射线单晶衍射测定。该配合物属于三斜晶系,P1空间群。晶体学数据:a=0.737 27(8),b=1.004 45(12),c=1.079 10(13)nm,α=113.771(2),β=102.005(2),γ=93.586(2)°,V=0.705 71(14)nm3,C13H11N4O5Zn,Mr=368.63,Dc=1.735 g.cm-3,μ(Mo Kα)=1.773 mm-1,F(000)=374,Z=2,最终R=0.027 6,wR=0.067 7用于2 460个可观测点。在晶体结构中,锌离子通过吡嗪-2,3-二甲酸和1,4-双(咪唑基1-甲基)-苯)配体桥联成二维层状结构。而且该配合物通过氢键和π-π堆积作用扩展成三维超分子网状结构。此外还研究了它的荧光性质。     

电感耦合等离子体原子发射光谱法测定紫斑牡丹胚乳和胚中矿物质元素

为了给离体体细胞胚的人工胚乳配制提供矿物质元素种类和数量方面的参考,用浓硝酸-高氯酸(4∶1)的混合溶液消解紫斑牡丹的胚乳和胚样品,采用电感耦合等离子体-原子发射光谱法(ICP-AES)测定了样品中的(K、Na、Ca、Mg、Fe、Cu、Zn、Mn、Li、Ni、B、Ag、Cd、Pb)14种矿物质元素含量。结果表明:各元素的校准曲线的回归系数在0.9990～0.9999之间,线性良好;方法精密度高,能多元素同时分析;紫斑牡丹胚乳和胚中均含有植物生长必需的K、Ca、Mg 3种大量元素,Fe、Mn、Cu、Zn、Ni、B 6种微量元素,1种有益元素Na,及Li和Pb,Ag、Cd则未被检测到。在被检测到的12种元素中,Mg、Zn、Mn、Fe、K、Na、Li与Ni 8种元素在胚乳中的含量低于胚中的含量,Ca、Cu、Pb与B在胚乳中的含量则高于胚中的含量。     

Synthesis and Crystal Structure of a Cobalt（Ⅱ） Complex with 2-（4＇-Chlorine-benzoyl）-benzoic Acid and 1,10-Phenanthroline

A new metal-organic complex Co2(cbba)4(phen)2(μ2-OH2)(H2cbba=2-(4'-chlorine-benzoyl)benzoic acid,phen=1,10-phenanthroline) 1 has been hydrothermally synthesized and struc-turally characterized by single-crystal X-ray diffraction,elemental analyses,TG and IR spectroscopy.The compound crystallizes in triclinic,space group P1 with a=10.7659(7),b=17.1856(11),c=19.2022(13),α=83.8120(10),β=84.9930(10),γ=87.2070(10)°,V=3515.8(4)3,C80H50Cl4Co2N4O13,Mr=1534.90,Dc=1.450 g/cm3,μ(MoKα)=0.693 mm-1,F(000)=1568,Z=2,the final R=0.0490 and wR=0.1092 for 8216 observed reflections(Ⅰ > 2σ(Ⅰ)).In the crystal structure,the cobalt atom is six-coordinated with three carboxylate oxygen atoms from three different cbba ligands,one oxygen atom from coordinated water molecule and two nitrogen atoms from phen ligand,showing a distorted octahedral geometry.Furthermore,it exhibits a 3D supramolecular network through π-π and hydrogen bonding interactions.     

Activity coefficients at infinite dilution of organic solutes in N-alkylpyridinium bis(trifluoromethylsulfonyl)imide ([CnPY][NTf2], n = 2, 4, 5) using gas–liquid chromatography

The activity coefficients at infinite dilution, for both polar and non-polar solutes in the ionic liquids N-alkylpyridinium bis(trifluoromethylsulfonyl)imide ([C_nPY][NTf₂], n = 2, 4, 5) have been determined by gas–liquid chromatography using the ionic liquid as the stationary phase. The measurements were carried out at the temperatures from (303 to 353) K. The partial molar excess enthalpies at infinite dilution of the solutes in the ionic liquids were also derived from the temperature dependence of the values. The values of the selectivity for the hexane/benzene and cyclohexane/benzene separation problems were calculated from experimental infinite dilution activity coefficient values and compared to the other ionic liquids, taken from the recent literatures.     

神光Ⅱ间接驱动内爆实验ArX射线谱线模拟研究

ICF内爆物理研究中,示踪元素X射线谱诊断方法是推测内爆压缩温度、 密度以及燃料混合状态的有效方法.针对其中的非平衡物理过程, 研制了非局域热动平衡(non-LTE)下一维谱线输运程序Alpha.程序以辐射流体计算给出的温度、 密度等量为输入条件,求解细致组态(DCA)模型下的原子动力学方程和辐射输运方程, 自洽给出谱线不透明度,和成像面上的X射线谱分布.
利用该程序,模拟了神光Ⅱ装置上的掺Ar靶丸内爆示踪元素X射线谱诊断实验, 研究结果表明,谱线的自吸收效应影响发射的X射线谱的强度和形状, 谱线的宽度对自吸收效应的强弱也有影响.因此,在对X射线谱的数值模拟中应该考虑自吸收效应. 另外,与LTE近似下的发射谱的比较表明, LTE近似下,等离子体电离度大～1, 发射谱的形状与non-LTE的结果不同,且LTE近似下,谱线的强度比non-LTE的谱线强度大5-10倍, 采用LTE近似是不合适的.