成形滤纸片薄样X射线荧光光谱法测定铝合金中镧铈镨钕钐

研究了用成形滤纸片薄样X射线荧光光谱法测定铝合金中的镧、铈、镨、钕、钐。方法具有准确、快速、简便、经济等优点。各元素的测定灵敏度为La 48054,Ce 65923,Pr 93953,Nd 62622,Sm107630 cps/(mg/cm~2)。定量分析下限约为0.xμg/cm~2。     

铋配合物[Bi(S2CNC5H10)2(NO3)]·[1，10-Phen]·0.5H2O的合成及晶体结构

The bismuth complex with dithiopiperdylcarbamate [Bi(S₂CNC₅H₁₀)₂(NO₃)]·[1，10-Phen]·0.5H₂O was synthesized. The crystal and molecular structure were determined by X-ray single crystal diffraction. The crystal belongs to monoiclinic with space group C2/c, a=3.140(2) nm, b=1.176 4(9) nm, c=2.021 6(15) nm, β=103.081(12)°, V=5.713(7) nm³, Z=8, F(000)=3064, D_c=1.815 g·cm^-3, μ=6.502mm^-1. The final R₁=0.0332, wR₂=0.040 3. In the complex, the bismuth atom is eight-coordinated in a capped distorted pentagonal bipyramidal geometry. CCDC: 222655.     

二聚体有机锡配合物{[n-Bu2Sn(O2CCH2CS2NC4H8)]2O}2的合成，表征及晶体结构(英)

The title compound, {[n-Bu₂Sn(O₂CCH₂CS₂NC₄H₈)]₂O}₂, has been synthesized by the reaction of (tetrahydro-pyrrodithiolocarbamoylthio)acetic acid with the di-n-bubyltin oxide in 1∶1 molar ratio. The complex has been characterized by elemental analysis, IR and NMR. The crystal structure of it has been determined by X-ray single crystal diffraction. And the results showed that the crystal belongs to triclinic system with space group P1 and some crystal parameters: a=1.220 2(9) nm, b=1.315 8(10) nm, c=1.380 4(10) nm, α=111.215(9)°， β=99.357(9)°， γ=96.075(10)°, V=2.006(2) nm³, Z=1, F(000)=908, μ=1.489 mm^-1, D_c=1.474 g·cm^-3, R₁=0.037 5, wR₂=0.0839. The complex has a centrosymmetric dimer structure mode with a four-membered central endo-cyclic Sn₂O₂ unit in which two bridged oxygen atoms both connect with an exo-cyclic tin atom which has a distorted octahedron. Each of the endo-cyclic tin atoms exhibits a distorted trigonal bipyramid coordination geometry with an additional weak coordination carboxylate oxygen. Four carboxylate ligands are divided into two types. And two of them are bidentate and connecting to each of exo-cyclic tin atoms by using both oxygen atoms, whereas the others bridge to each pair of exo-and endo-cyclic tin atoms utilizing one oxygen atom only. CCDC: 220513.     

三苄基锡二硫代氨基甲酸酯的合成

三苄基锡二硫代氨基甲酸酯的合成尹汉东马春林＊张如芬（聊城师范学院化学系聊城２５２０５９）关键词三苄基氯化锡，二硫代氨基甲酸盐，合成１９９７－０７－１０收稿，１９９７－０９－０９修回山东省自然科学基金资助项目三烃基锡衍生物是一类具有较强生物活性的有机锡...     

含杂环羧酸基二苄基锡(Ⅳ)配合物的合成与表征

以二苄基二氯化锡和杂环羧酸钠为原料合成了十种新的有机锡配合物(PhCH₂)₂Sn(O₂CR)_nCl_2-n(n=1或2，R=杂环)。用元素分析、IR、 ¹H NMR和TG表征了配合物的组成和结构。     

含模板结构分子印迹材料制备及识别性能研究

以双酚A(BPA)为模板分子,α-甲基丙烯酸(MAA)为功能单体,以含模板分子结构的双酚A二甲基丙烯酸酯(BPDMA)为交联剂,制备了含模板结构的分子印迹聚合物材料,并与以二甲基丙烯酸乙二醇酯(EGDMA)和N, N-亚甲基双丙烯酰胺(BIS)为交联剂制备的BPA印迹材料进行对比。结果表明:以BPDMA为交联剂制备的材料印迹性能最佳,其印迹因子为5.32,吸附量为5.05 mg/g;以EGDMA和BIS为交联剂制备的材料印迹因子分别为1.41和1.45,吸附容量分别为0.96 mg/g和2.79 mg/g。将所制备材料应用于牛奶中BPA的富集检测,得到的加标回收率为95.0%～98.9%,相对标准偏差为3.5%～4.2%,表明得到的印迹材料可用于复杂体系BPA的选择性富集。     

钽离子掺杂对LiFePO4 / C物理和电化学性能的影响

采用PAM(聚丙烯酰胺)模板-溶胶凝胶法在惰性气氛下合成钽掺杂的LiFePO₄/C复合正极材料，考察了钽对目标化合物的物理和电化学性能的影响。研究结果表明，0.33C的电流下充放电时，掺杂前后第2个循环的放电容量分别为138.6 mAh·g^-1和155.5 mAh·g^-1，循环20次后容量为141 mAh·g^-1和156 mAh·g^-1。电化学交流阻抗表明，掺杂后的材料阻抗R_ct从180 Ω减小到120 Ω。振实密度比掺杂前提高0.312 g·cm^-3。     

One-dimensional Infinite Chain Organotin Compounds: Synthesis and Structural Characterization of Triphenyltin Thiazole-2-carboxylate and Triphenyltin 3-Pyridinylcarboxylate

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三苯基锡(Ⅳ)荒酸盐Ph3SnS2CN(C2H5)2的波谱及结构研究

合成了三苯基锡(Ⅳ)Ⅳ，Ⅳ-二乙基荒酸盐。通过元素分析、红外光谱和核磁共振氢谱对其结构进行了表征。用X-射线单晶衍射测定了该化合物的晶体结构；结果表明，化合物中锡原子呈五配位畸变三角双锥构型。     

防患于未然—代谢综合症发病趋势预测模型

本文建立基于动态变异和随机转录的人类生命量化模型,对个人生物分子间相互作用和基因通路信息进行定理研究.据此筛选出代谢综合症的4个生理指标:中心肥胖指数、血压强度、血糖含量和血脂浓度.用ClinicalTrials.gov的临床数据求解模型得到,当推荐代谢综合症指数大于0.066时,患者患有代谢综合症,因此认为该指数为代谢综合症的一项数据特征.另一方面,对可能引发代谢综合症的许多并发症的21个基因通路进行了筛选,得出了PTP1B等影响最大的5个基因通路,并认为他们是代谢综合症的关键基因通路.