Syntheses, Crystal Structures and Characterization of Two New Cadmium(II) Arsonates

Two cadmium arsonate coordination polymers, Cd（HL1）2 （1, H2L1 = 4-aminophenylarsonatic acid） and Cd（H2L2）2·2H2O （2, H3L2 = 2-（4-arsonphenylamino）acetic acid）, have been synthesized and characterized by IR and single-crystal X-ray diffraction. Crystal data for 1： triclinic, space group P1 with a = 5.7559（12）, b = 7.0903（14）, c = 8.9925（18）, α = 89.04（3）, β = 80.79（3）, γ = 85.09（3）o, Dc = 2.496 g·cm-3, μ = 6.095 mm-1, F（000） = 260, Z = 1, the final R = 0.0574 and wR = 0.1376 for 1489 observed reflections with I 〉 2σ（I）. And those for 2： monoclinic, space group P21/c with a = 4.7595（10）, b = 9.925（2）, c = 22.609（5）, β = 91.81（3）°, Dc = 2.167 g·cm-3, μ = 4.168 mm-1, F（000） = 684, Z = 2, the final R = 0.0335 and wR = 0.0815 for 2340 observed reflections with I 〉 2σ（I）. The structure of 1 shows a two-dimensional layer consisting of inorganic chains of {CdN2（AsO3）2} along the a axis linking with the phenyl groups. These layers are further linked through strong interlayer hydrogen bonding interaction to form a three-dimensional hydrogen bond supramolecular architecture. Compound 2 has inorganic chains of {CdO2（AsO3）2} similar to 1, which connect with four adjacent inorganic chains forming a three-dimensional framework.

Synthesis and Characterization of Chiral Mercury(II) and Cadmium(II) Complexes with 3,3'-Bipyridine-5,5',6,6'-tetramethyl-2,2'-dimethoxy-1,1'-biphenyl

Two homochiral mercury （1） and cadmium （2） complexes derived from chiral twisted biphenyl pyridine ligand （3,3＇-bipyridine-5,5＇,6,6＇-tetramethyl-2,2＇-dimethoxy-1,1＇-biphenyl） have been synthesized and characterized by IR, microanalysis, TGA, UV-Vis, powder and single-crystal X-ray crystallography. Both 1 and 2 crystallize in orthorhombic space group P21212 with Z = 2. For 1, a = 14.2038（16）, b = 14.3630（17）, c = 7.0257（8）, V = 1433.3（3）3, Mr = 878.91, Dc = 2.037 g/cm3, μ = 7.549 mm-1, F（000） = 824, the final GOF = 1.017, R = 0.0296 and wR = 0.0645 for 2925 observed reflections with I 2σ（I）. For 2, a = 14.212（3）, b = 14.392（3）, c = 7.0498（14）, V = 1442.0（5）3, Mr = 790.72, Dc = 1.821 g/cm3, μ = 2.924 mm–1, F（000） = 760, the final GOF = 1.075, R = 0.0340 and wR = 0.0834 for 3144 observed reflections with I 2σ（I）. The crystal structures of 1 and 2 are isostructural and each adopts a two-dimensional supramolecular network which contains the C–H···π interactions.

Adsorption behavior and mechanism of cadmium on strong-acid cation exchange resin

The adsorption behavior of Cd2+ on 001×7 strong-acid cation exchange resin was studied with the static adsorption method. The adsorption process was analyzed from thermodynamics and kinetics aspects. The influences of experimental parameters such as pH, temperature, initial concentration and adsorption rate were investigated. The experimental results show that in the studied concentration range, 001×7 resin has a good sorption ability for Cd2+, and the equilibrium adsorption data fit to Freundlich isotherms. The adsorption is an exothermic process which runs spontaneously. Kinetic analysis shows that the adsorption rate is mainly governed by liquid film diffusion. The best adsorption condition is pH 4-5. The saturated resin can be regenerated by 3 mol/L nitric acid, and the desorption efficiency is over 98%. The maximal static saturated adsorption capacity is 355 mg/g (wet resin) at 293 K. The adsorption mechanism of Cd2+ on 001×7 resin was discussed based on IR spectra.

Polymeric Structure and Solid ^(31)P, ^(113)Cd NMR Spectra of Cadmium(II) Dialkyldithiophosphate (Alkyl = n-butyl and i-butyl)

Two polymeric complexes, [Cd(BTP)2]n 1 and [Cd(i-BTP)2]n 2, were prepared and investigated by solid 31P and 113Cd NMR spectroscopies. The crystal structure of 2 was determined by X-ray diffraction.

Synthesis and Electrochemical, Fluorescent and Magnetic Properties of a New Cadmium(II) Complex with 2-Benzoylbenzoic Acid

A new cadmium(II) complex Cd(OBBA)2(2,2A-bipy)2 with 2-benzoylbenzoic acid(HOBBA) and 2,2-bipyridine(2,2A-bipy) as ligands has been synthesized. Crystal data for the complex are as follows: monoclinic, space group P21/c with a = 16.402(3), b = 10.4191(18), c = 23.395(4) A, β = 91.765(2)o, V = 3996.2(12) A3, Dc = 1.455 gAcm-3, Z = 4, μ(Mo Kα) = 0.603 mm-1, F(000) = 1784, the final R = 0.0218 and w R = 0.0558. In the electrode reaction, its electron transfer is quasi reversible and the electrode reaction corresponds to Cd(II)/Cd(0). Under 618 nm radiation, the title complex shows a strong fluorescent band at around 326 nm. In addition, in the range of 2~300 K, this complex displays diamagnetic property.

Biochemical and Immunochemical Characterization of Caenorhabditis elegans Metallothioneins I and II Induced by Cadmium

Metallothioneins in Caenorhahditis elegans (CeMT-Ⅰ and Ⅱ) were punned by the combination of gel filtration ion-exchange chromatography.and high-performance liquid chromatography.Amino acid compositions and amino-terminal sequences of CeMT-Ⅰ and Ⅱ were slightly different from those of vertebrate MTs previously reported, although cysteine residue contents were relatively high.Enzyme immunoassay using anti-CeMT-Ⅱ antibody showed the difference of antigenicity to rat MT-Ⅰ and Ⅱ and even to CeMT-Ⅰ. Immunohistochemical staining revealed the existence of CeMT-Ⅱ in the intestine and the eggs, suggesting the role of MT in detoxification and homeostasis of heavv metals. 1990 Academic Press.Inc.

镉电解沉积过程中共存阳离子的反应行为

镉资源复杂多样,镉电解沉积系统中通常含有诸多杂质金属,如铜、锌、铁、镍等。本文通过系统的实验研究,考察了Cu^(2+)、Ni^(2+)、Fe^(2+)及Zn^(2+)的反应行为及对镉电沉积过程电流效率、阴极镉的纯度和形貌的影响,进一步确定了Cu^(2+)、Ni^(2+)、Fe^(2+)及Zn^(2+)的最低影响浓度。结果表明,Cu^(2+)浓度低于1 mg/L时,对镉电沉积几乎没有影响;而Ni^(2+)浓度即使达到2.5 g/L,产生的影响也微乎其微;Fe^(2+)浓度高于20 mg/L就会引起电流效率降低;Zn^(2+)浓度控制在1.5 g/L以下时,对电沉积的影响较小。根据电化学分析和微观形貌表征,Cu^(2+)会优先沉积与镉形成化合物,Fe^(2+)的氧化还原会导致电流效率下降和单位电耗上升;除镍之外,Cu^(2+)、Fe^(2+)及Zn^(2+)均会影响阴极镉的形貌。研究结果进一步完善了复杂溶液中镉电解沉积的基础理论。

培养条件及外源添加物对香菇菌丝体及子实体镉含量的影响

为探求抑制香菇镉富集的方法,开发镉污染防控技术,设置实验室菌丝培养和大棚袋式栽培2个阶段试验,分析培养条件及外源添加物对香菇菌丝及子实体中镉含量的影响。结果显示,在温度10~30℃范围内随着培养温度升高,菌丝镉含量呈现先上升后平稳的趋势;在pH 4~8范围内随着培养基pH值升高,菌丝镉含量呈现先上升后下降的趋势;在含镉的液体培养基中分别添加5 mmol/L Ca(NO_(3))_(2)、KNO_(3)和Mg(NO_(3))_(2),发现Mg^(2+)能明显抑制菌丝对镉的富集;随着香菇子实体发育成熟,镉含量逐渐降低,不同部位镉含量呈现菌褶>菌盖>菌柄;在培养料中分别添加硫酸镁、硫酸锌、活性炭和沸石,发现添加50 mg/kg硫酸镁、60 mg/kg硝酸锌和2.5%活性炭,能使子实体镉含量下降42.8%、46.9%和50.3%。上述研究表明,培养条件和外源添加物对香菇菌丝体和子实体镉含量具有一定的影响,可通过外源添加物抑制香菇对镉的富集作用。

太子健II缓解期防治小儿哮喘作用机理的实验研究

运用鸡卵蛋白致敏和反复诱喘的哮喘豚鼠模型,将豚鼠随机分为正常组、模型组、地塞米松组、高剂量和低剂量组5组,观察太子健II对其血及气道内嗜酸细胞浸润和血中白介素-5(IL-5)、嗜酸粒细胞阳离子蛋白(ECP)含量的影响.结果表明太子健II可减少哮喘豚鼠血及气道内EOS浸润,降低血中白介素-5(IL-5)和ECP的水平.说明太子健II可以减轻气道慢性变应性炎症,具有一定的抗哮喘复发的作用.

防爆电气CCC认证领域分析研究

自2019年10月1日起,防爆电气产品纳入强制性产品认证管理范围,由指定认证机构开始受理相关委托。本文从认证机构角度,选取强制性产品认证指定认证机构中创新海(天津)认证服务有限公司,对2021年度Ⅱ类、Ⅲ类防爆电气认证领域受理数据进行汇总。从17类防爆电气产品受理类型、数量、各月变化趋势,以及涉及的地区数据进行图表分析,得出防爆电气产品申请数量、种类有较多影响因素。为防爆电气各方进行CCC认证提供参考借鉴。

Crystal Structure of a Cadmium(Ⅱ) Complex Containing an Amide Type Ligand

The compound [Cd（L）2（NO3）]NO3·0.5H2O （L = N-benzyl-2-（quinolin-8-yloxy）aceta- mide） 1 has been synthesized and structurally determined by single-crystal X-ray diffraction, elemental analysis, IR and UV spectroscopy. The crystal belongs to the triclinic system, space group P1 with a = 11.7175（13）, b = 11.8873（13）, c = 14.0958（16） A, α = 74.889（2）, β= 78.228（2）, γ = 78.831（2）°, V= 1835.0（4） A3, Z= 1, Dc= 1.502 Mg/m3, Mr = 1660.17,μ = 0.662 mm-1, F（000） = 846, 2（MoKa） = 0.71073 A, the final R = 0.0585 and wR = 0.0577 for all observed reflections. The results show that the Cd（II） ion with a square antiprismatic geometry is coordinated by a N206 donor set, two NO2 sets from two ligands and two O atoms from a bidendate nitrate group. In the crystal, the O-H...O and N-H...O hydrogen bonds are helpful to consolidate the three- dimensional network.

An Effective of Dye Molecules with Cadmium Sulfide Nanorods in Dye Sensitized Solar Cell (DSSCs)

The aligned hexagonal cadmium sulfide nanorods (CdSNR) have been synthe-sized by hydrothermal technique at 200&#186C on fluorine tin oxide (FTO) sub-strates. Dye sensitized solar cells (DSSCs) based on the photoelectrode core-shell CdSNR array with conductive polymers nanocomposite of polyaniline (PANI) and poly(3,4-ethylenedioxyl-thiophene)/poly(styrene-sulfonate) (PEDOT:PSS) were fabricated and designed with different types of dye molecules. DSSCs were characterized utilizing scanning electron microscopy (SEM), Raman scattering, energy dispersive spectroscopy (EDS), UV-Vis absorption spectroscopy, X-ray diffraction (XRD), and photocurrent-voltage (J-V) characteristic. Results show that under illumination (AM 1.5 G), the high power conversion energy (PCE) was achieved for CdSNR/PANI-PEDOT:PSS device when it sensitized with ruthenium (II) (dye N-719) of 0.91% and a short circuit current density (Jsc) of 4.21 mA/cm2 in comparison with the other devices, which sensitized with natural dyes. The high performance of the CdSNR/PANI-PEDOT:PSS-N719 device attributed to the wide range of absorption and photostability for N719. This work shows that the CdSNR with N719 can be appropriate candidate for photovoltaics device for their low cost fabrication procedure and excellent absorption.

Electrochemical Determination of Trace Amounts of Lead (Ⅱ) and Cadmium (Ⅱ) at a Calix[6]arene Modified Carbon Paste Electrode

An electrochemical method for the simultaneous determination of lead(II) and Cadmium(II) with a calix[6]arene modified carbon paste electrode (CPE) has been developed. Pb2+ and Cd2+ were accumulated at the surface of the modified electrode via formation of chemical complexes with calix[6]arene, and reduced at 1.40 V. During the following anodic potential sweep, reduced lead and cadmium were oxidized, and two well-defined striping peaks appeared at about ?0.60 V and ?0.84 V. Compared with a bare carbon paste electrode, the calix[6]arene modified CPE greatly improves the sensitivity of determining lead and cadmium. The stripping peak currents change linearly with the concentration of Pb2+ 3.0×10?8–8.0×10?6 mol·L?1 and with that of Cd2+ 6.0×10?8–1.0×10?5 mol ·L?1. The detection limits of Pb2+ and Cd2+ are found to be 8.0×10?9 mol·L?1 and 2.0×10?8 mol·L?1, respectively. The modified carbon paste electrode was applied to determine trace levels of lead and cadmium in water samples. Comparing with that of atomic absorption spectrometry, the results suggests that the calix[6]arene modified CPE has great potential for the practical sample analysis. Key words lead(II) - cadmium(II) - calix[6]arene - differential pulse stripping voltammetry - chemically modified electrode CLC number O 657.15 Foundation item: Supported by the National Natural Science Foundation of China (60171023)Biography: JI Xiao-bo (1980-), male, Master, research direction: electroanalytical chemistry.

Crystal,Thermal Behavior and Electrochemical Property of Dichloro-tri(N-ethylimidazole)-cadmium

The title compound Cd（Eim）3Cl2 （Eim = N-ethylimidazole） I has been synthesized and structurally characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P2 1 with a = 8.0460（16）, b = 29.186（6）, c = 8.8960（18）A,β= 100.06（3）°, C15H24CdCl2N6, Mr = 471.71, V = 2056.9（7）A^3 Z = 4, Dc = 1.523 g/cm^3,/1 = 1.330 mm^-1, F（000） = 952, the final R = 0.0455 and wR = 0.0723. The title compound crystallizes with two molecules in the asymmetric unit. Each Cd^II ion is coordinated by three Eim ligands and two Cl anions in a trigonal bipyramidal geometry in two molecules. The weak intermolecular C-H……Cl hydrogen bonds link the molecules into two independent hydrogen-bonded chains running along the c axis. According to the cyclic voltammogram measurement in H2O, the electrode reaction should be a quasi-reversible process.

A New Cadmium(Ⅱ) Coordination Polymer Incorporating a 3D Framework with 1D Channels Bridged by Flexible Cyclohexane-1,2,4,5-tetracarboxylate Ligand

The hydrothermal reaction of Cd（OAc）2·2H2O, 4,4＇-bpy and cyclohexane-1,2,4,5-tetracarboxylic acid （H4L） yields a three-dimensional （3D） coordination porous framework [Cd2LI（4,4＇-bpy）1.5（H2O）2]n·2nH2O, which was characterized by single-crystal X-ray diffraction （MoKα radiation, λ = 0.71073）, elemental analysis and IR. This complex crystallizes in the monoclinic system, space group C2/c with a = 25.951（3）, b = 11.6618（12）, c = 20.046（2） A, β = 114.863（2）o, V = 5504.4（10）A^3, Z = 8, Dc = 1.900 g/cm^3, Mr = 787.30, μ = 1.615 mm^-1, F（000） = 3128, the final R = 0.0978 and wR = 0.1780. The structure of the complex is a 3D coordination Cd-carboxylate framework consisting of 1D hexagonal channels along the c-axis filled with the bridging 4,4＇-bpy ligands. The 4,4＇-bpy ligands with two kinds of conformations are located alternately in the channels through coordination and hydrogen interactions to support the whole porous framework, in which the conformation-flexible cyclohexane-1,2,4,5-tetracarboxylate ligand adopts the I （e,a,a,e） conformation and acts as a pentadentate ligand to connect five Cd（Ⅱ） atoms via the carboxylate groups in different coordination modes.

乳化液膜提取工业废水中多种共存金属离子的研究

同时提取多种重金属离子的实际应用意义较大,本实验利用正交实验法确定了从模拟工业废水中提取三种离子的最佳膜配方,同时考察了其他条件对多种重金属离子萃取率和乳液膜破乳率的影响。经一级液膜萃取,Cu(Ⅱ)、Zn(Ⅱ)、Cd(Ⅱ)三种离子萃取率均到达98%以上,实验结果较好。

异价阳离子替代实现的金属卤化物CsCdCl_(3)的明亮宽带绿色发光

全无机金属卤化物灵活多变的结构及优异的发光性能使其在固态光电子领域显示出重要的应用前景。本研究采用异价阳离子取代策略,用三价锑离子部分取代CsCdCl_(3)中的二价镉离子,促进自陷激子的产生,使CsCdCl_(3)∶Sb^(3+)产生了明亮的宽带绿色发光,中心波长为530 nm。机理研究结果表明,CsCdCl_(3)∶Sb^(3+)中相邻SbCl_(6)八面体被孤立,形成了低维电子构型,促进了Sb^(3+)局域化,实现了量子效率最高为95.5%的高效发光。此外,尽管CsCdCl_(3)和RbCdCl_(3)均属于ACdCl_(3)(A为碱金属家族),但它们的晶体结构明显不同。RbCdCl_(3)属于正交晶系,空间群为Pnma;CsCdCl_(3)属于六方晶系,空间群为P63/mmc。CsCdCl_(3)的结构对称性大于RbCdCl_(3),其晶体结构偏离立方相的扭曲程度比RbCdCl_(3)小,导致CsCdCl_(3)∶Sb^(3+)比RbCdCl_(3)∶Sb^(3+)有较小的斯托克斯位移,并造成发射光谱的蓝移。本工作不仅为异价阳离子取代设计新的发光材料提供了方法,而且为通过晶体结构对称调控金属卤化物的发光性能提供了思路。

参芪蛭龙汤对膜性肾病模型小鼠肾组织中FcγRⅠ、FcγRⅡB、FcγRⅢA表达的影响

目的 探讨参芪蛭龙汤对膜性肾病(MN)模型小鼠肾组织中FcγRⅠ、FcγRⅡB、FcγRⅢA表达的影响。方法 60只SPF级ICR小鼠,6周龄,体重(23±4)g,雌雄各半,按照随机数字表法分为空白组(10只)和造模组(50只)。造模组小鼠注射阳离子化牛血清白蛋白,复制MN小鼠模型。取其中造模成功的40只小鼠按照随机数字表法分为模型组,参芪蛭龙汤高、低剂量组(24、12 g/kg)和雷公藤多苷片组(14 mg/kg),每组10只。给药4周后,处死小鼠。HE、Masson染色观察肾脏组织病理变化;免疫荧光法观察肾组织中FcγRⅠ、FcγRⅡB、FcγRⅢA蛋白荧光强度;Western blot检测肾脏组织内FcγRⅠ、FcγRⅡB、FcγRⅢA蛋白表达;RT-PCR检测肾脏组织中FcγRⅠ、FcγRⅡB、FcγRⅢA mRNA表达。结果 HE染色显示空白组小鼠上皮细胞、基底膜、肾小管及肾间质形态结构均未见明显异常。模型组小鼠肾小球体积增大,肾小球毛细血管袢扩张,血细胞溢出,肾小球系膜增厚,肾小囊腔增大,局部肾小囊腔壁上皮严重破损。与模型组比较,参芪蛭龙汤高剂量组小鼠可见肾小球体积减小,基底膜增厚减轻,肾小囊壁上皮未破损或局部破损。Masson染色显示空白组小鼠肾小球基底膜正常。模型组小鼠上皮下大量嗜复红蛋白沉积,可见基底膜基质反应,肾小管空泡样脂肪变性,肾间质淋巴大量增生。与模型组比较,各给药组小鼠病变减轻,以参芪蛭龙汤高剂量组改善更加明显。与空白组比较,模型组FcγRⅠ、FcγRⅢA蛋白荧光增强,FcγRⅡB蛋白荧光减弱(P<0.05);与模型组比较,参芪蛭龙汤高剂量组FcγRⅠ、FcγRⅢA蛋白荧光减弱(P<0.05),参芪蛭龙汤高、低剂量组FcγRⅡB蛋白荧光增强(P<0.05);与参芪蛭龙汤低剂量组比较,参芪蛭龙汤高剂量组FcγRⅠ、FcγRⅢA蛋白荧光减弱,FcγRⅡB蛋白荧光增强(P<0.05)。与空白组比较,模型组FcγRⅠ、FcγRⅢA蛋白表达升高,FcγRⅡB蛋白表达降低(P<0.05);与模型组比较,参芪蛭龙汤高剂量组FcγRⅠ、FcγRⅢA蛋白表达降低,参芪蛭龙汤高、低剂量组FcγRⅡB蛋白表达升高(P<0.05);与参芪蛭龙汤低剂量组比较,参芪蛭龙汤高剂量组FcγRⅡB蛋白表达升高,FcγRⅢA蛋白表达降低(P<0.05)。与空白组比较,模型组FcγRⅠ、FcγRⅢA mRNA表达升高,FcγRⅡB mRNA表达降低(P<0.05);与模型组比较,参芪蛭龙汤高、低剂量组FcγRⅠ、FcγRⅢAmRNA表达降低,FcγRⅡB mRNA表达升高(P<0.05);与参芪蛭龙汤低剂量组比较,参芪蛭龙汤高剂量组FcγRⅠ、FcγRⅢA mRNA表达降低,FcγRⅡB mRNA表达升高(P<0.05)。结论 参芪蛭龙汤对MN小鼠的治疗作用与改善肾组织病理改变,减少FcγRⅠ、FcγRⅢA蛋白的表达,增加FcγRⅡB蛋白表达有关,其中高浓度的参芪蛭龙汤效果更好。

镉离子荧光传感器的研究进展

随着镉离子对人类危害的日益加深,能够方便、快捷、价廉地分析检测镉离子的荧光传感器受到人们的广泛关注。介绍了近10年来以冠醚、杯芳烃、多胺类等物质作为镉离子荧光传感器的研究现状。

啤酒酵母吸附镉离子的试验研究

研究了啤酒酵母对镉的生物吸附过程 ,结果表明 ,啤酒酵母吸附镉的速度是非常快的 ;p H对镉的吸附影响较大 ,吸附较佳的 p H范围为 4～ 8,并且啤酒酵母有调节 p H的作用 ,p H为 4～ 8的溶液在吸附反应后 ,其 p H接近于 5 .8;温度、酵母用量、Cd2 +的初始浓度对吸附均有一定的影响。实际含镉废水处理结果表明 ,啤酒酵母处理含镉废水是有效的。