一个由5-硝基间苯二甲酸和1，10-啉啡咯啉构筑的锰配位聚合物的水热合成和晶体结构

通过水热法合成了1个新的金属-有机配位聚合物[Mn(NIPH)(phen)₂]·4H₂O(H₂NIPH=5-硝基间苯二甲酸,phen=1,10-邻菲咯啉)。并对其进行了元素分析、热重、红外光谱和X-射线单晶衍射测定。该配合物属于单斜晶系,P2₁/n空间群。晶体学数据：a=1.082 2(2) nm,b=2.288 3(5) nm,c=1.289 6(3) nm,β=105.11(3)°,V=3.083 2(11) nm³,C₃₂H₂₇MnN₅O₁₀,M_r=696.53,D_c=1.501 g·cm^-3,μ(Mo Kα)=0.497 mm^-1,F(000)=1 436,Z=4,最终R=0.059 2,wR=0.134 5用于4 079个可观测点。在晶体结构中,锰原子为六配位与来自2个不同的NIPH配体上的2个羧基氧原子和来自2个phen配体上的4个氮原子配位,呈现畸变的八面体几何构型。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。     

Hydrothermal Synthesis, Crystal Structure and Photoluminescent Property of a New Isophthalate- bridged Zinc(II) Polymer with One-dimensional Chain Structure: [Zn(ipt)(im)_2]_(2n)·3nH_2O (ipt = Isophthalate, im = Imidazole)

1 INTRODUCTION The design and synthesis of metal-organic frame- work structure have been studied widely during the past decade not only because of their intriguing architectures but also their unexpected properties for potential practical applications in a wide number of fields, such as asymmetric catalysis, magnetism, pho- toluminescence and so on[1～3]. These novel struc- tures can be rapidly and efficiently synthesized from simple subunits, where the metal ions, bi- or multi- dentate o…     

Hydrothermal Synthesis and Crystal Structure of a New Zero-dimensional Complex: [Zn(H_2BPTC)(phen)_2]_n·3nH_2O

A new metal-organic coordination complex [Zn(H2BPTC)(phen)2]n·3nH2O (BPTC = 3,3′,4,4′-benzophenone tetracarboxylate, phen = 1,10-phenanthroline) 1 has been obtained from hydrothermal reaction and characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. In compound 1, the zinc cation is hexa-coordinated with two carboxylate oxygen atoms from one H2BPTC ligand and four nitrogen atoms from two different phen ligands, showing a slightly distorted octahedral geometry. Crystal data: C41H30N4O12Zn, Mr = 836.06, monoclinic, P21/c, a = 14.2714(9), b = 16.9386(10), c = 15.0151(9) , β = 101.3420(10)o, V = 3558.8(4) 3, Dc = 1.560 g/cm3, μ(MoKα) = 0.766 mm-1, F(000) = 1720, Z = 4, R = 0.0439 and wR = 0.1157 for 4123 observed reflections with I > 2σ(I).     

汽车尾气净化器用活性氧化铝的研制

应用一种新的氧化铝制备方法-水合含碳氧化铝热解法, 通过引入模板导向剂和热稳定助剂, 制得了Al2O3纯度≥99.9%, 一次晶粒0.1 μm, 平均粒径0.2～3 μm, BET比表面积148.4 m2*g-1(900 ℃, 1 h焙烧)的活性氧化铝. 该方法所得产品性能稳定, 孔容大, 孔径分布合理, 纯度高. 样品经用户小批量试用认定 其新鲜态、老化后的比表面积和小杂质含量(P, S, Cl, Pb)指标均优于国内同类产品, Al2O3涂层粘结强度、涂层负载量等性能达到国际先进水平.     

簿层树脂相吸光光度法测定痕量钴的研究

提出了用薄层树脂相通过光度法测定痕量钴的新方法。本法具有灵敏度高，选择性好，快速等特点。钴离子（Ⅱ）与４－（５－氯－二吡啶）偶氮］－１，３－二氨基苯（简称５－Ｃｌ－ＰＡＤＡＢ）生成有色稳定配合物，将其富集在Ｈ＋型（７３２~＃）。阳离子交换树脂上，制作成薄层直接测定，λ_（ｍａｘ）＝５７１ｎｍ。本法既克服了需特制１ｍｍ比色皿的困难，又提高了测定精密度，使推广树脂相光度法成为可能。用本法实测了天然水中痕量钴，检测限２．８μｇ·Ｌ~（－１），回收率≥９８％。     

两个由异烟酰胺构筑的钴、镍配合物的合成及晶体结构

采用溶液培养法,在室温下合成了2个新的过渡金属配合物[Co(inta)2(H2O)4][Co(H2O)6](tdc)2.2H2O(1)和[Ni(inta)2(H2O)4](tdc).2H2O(2)(inta=异烟酰胺,H2tdc=2,5-噻吩二甲酸)。并对其进行了元素分析、红外光谱、紫外光谱、热重和X-射线单晶衍射测定。这两个配合物通过氢键和π-π相互作用形成了三维超分子网状结构。     

A low-noise,high-SNR balanced homodyne detector for the bright squeezed state measurement in 1–100 kHz range

We report a low-noise, high-signal-to-noise-ratio(SNR) balanced homodyne detector based on the standard transimpedance amplifier circuit and the inductance and capacitance combination for the measurement of the bright squeezed state in the range from 1 kHz to 100 kHz. A capacitance is mounted at the input end of the AC branch to prevent the DC photocurrent from entering the AC branch and avoid AC branch saturation. By adding a switch at the DC branch,the DC branch can be flexibly turned on and off on different occasions. When the switch is on, the DC output provides a monitor signal for laser beam alignment. When the switch is off, the electronic noise of the AC branch is greatly reduced at audio-frequency band due to immunity to the impedance of the DC branch, hence the SNR of the AC branch is significantly improved. As a result, the electronic noise of the AC branch is close to -125 dBm, and the maximum SNR of the AC branch is 48 dB with the incident power of 8 mW in the range from 1 kHz to 100 kHz. The developed photodetector paves a path for measuring the bright squeezed state at audio-frequency band.     

Synthesis,Crystal Structure and Fluorescent Properties of Silver and Cadmium Complexes

Two new complexes [Ag(bix)]n·n NAA·n H_2O(1) and [Cd(NAA)(phen)_2(H_2O)]2· 2CH_3COO-·H_2O(2)(bix = 1,4-bis(imidazol-1-ylmethyl)benzene,HNAA = α-naphthylacetic acid,phen = 1,10-phenanthroline) have been successfully synthesized under hydrothermal conditions.Their structures have been determined by elemental analyses,IR spectroscopy,TG and single-crystal X-ray diffraction analysis.The intermolecular hydrogen bonding or π-π stacking interactions extend the complexes into a 3D supramolecular structure.Moreover,the luminescent properties of complex 2 have been investigated in the solid state.     

网状钼酸铋的可见光催化活性

采用无助剂、无模板的水热法成功合成网状Bi2MoO6. pH值对这一形貌的形成起重要作用. 所制备的网状Bi2MoO6样品表现出优异的可见光催化活性,其光催化活性比固相法合成的块状Bi2MoO6样品高得多.