分析方法不确定度评定的通用数学模型

在总结化学实验室常用分析方法共性的基础上,提出了常用分析方法不确定度评定的通用数学模型,介绍了各不确定度分量的计算方法.并通过适当变换,实现了该数学模型在不同分析方法(如滴定法、极谱法、原子吸收光谱法、吸光光度法等)测量结果不确定度评定中的应用.     

一维化合物[Gd2(PDC)3(phen)(H2O)·H2O]n的合成、晶体结构及热性质

A one-dimensional complex, [Gd2(PDC)3(phen)(H2O) ? H2O]n (H2PDC=pyridine-3,4-dicarboxylic acid, phen =l,10-phenanthroline), has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, TG analysis, and X-ray single-crystal structure analysis. Crystallographic data for the title complex:C33H21Gd2N5O14, Mr=l 026.05, Triclinic, space group P1, a=0.751 07(15) nm,b=1.256 5(3) nm, c=1.825 7(4) nm, α=70.80(3)°,β=79.00(3)°, γ=76.05(3)°, V=1.567 4(5) nm3, the final refinement gave R =0.022 4 and wR =0.047 5 for The current version does not support copying Cyrillic text to the Clipboard.The current version does not support copying Cyrillic text to the Clipboard.extended to a 3D supramolecular network through H-bonds interaction. CCDC: 671430.     

通过稀土离子和羧酸配体组装成的两种新型的二维配位聚合物的合成、晶体结构及荧光性质

利用水热法合成了两种新型的二维（2D）稀土配位聚合物[Ln(PDC)(OH)(H2O)2]n (Ln = Eu (1) and Tb (2), H2PDC = 3,4-吡啶二羧酸),通过元素分析、红外光谱、热分析和X射线单晶衍射等技术对其进行了表征。单晶结构分析表明这两种配合物都显示出包含有一维Ln-O-Ln链的二维层状结构,层间又进一步通过 π-π 堆积和氢键作用扩展成三维超分子网络结构。此外,这两种配合物的固体在室温下都有强的荧光发射。     

Synthesis and Characterization of Three Diverse Coordination Frameworks under Co-ligand Intervention

The chelating organic ligands of 2,2’-bipyridine (2,2’-bipy), di(pyrid-2-yl)amine (dpa) and 2,6-di(pyrid-2-ylamino)pyridine (dpap) were respectively applied to react with H2fum (fumaric acid) and copper salts, affording three different complexes [Cu2(fum)(2,2’-bipy)4]•2ClO4 (1), [Cu2(µ-OH)2(fum)(dpa)2]•2H2O (2) and [Cu(SO4)(H2O)(dpap)]•H2O (3). These complexes were determined by single-crystal X-ray diffraction. Each penta-coordinated Cu(II) ion exhibits a distorted trigonal bipyramidal geometry in 1. The fum ligand links copper ions to form a dinuclear copper unit. While in 2, the fum ligands connect [Cu2(µ-OH)2(dpa)2] unit to construct a 1D zigzag chain. Unexpectedly, when dpap instead of dpa was used under the same conditions, only one mononuclear complex 3 was formed. Crystal packings show that 1—3 form 3D supramolecular architectures through non-covalent interactions (multiple hydrogen bonds and C—H…π/π-π interactions). In addition, the study of the magnetic property reveals dominating ferromagnetic interactions between Cu(II) atoms in 1.     

有机药物分子与DNA相互作用的研究进展

综述了有机药物分子与DNA相互作用的模式、影响因素、并着重介绍了其相互作用的电化学等研究方法,概括了其近几年的研究进展,并在此基础上提出了在药物分子与DNA相互作用的研究工作中应解决的问题.     

便携式GC-MS在挥发性有机物应急监测中的应用

建立了便携式GC-MS测定空气中37种挥发性有机物(VOCs)的方法,采用便携式GC-MS配置的手持探头采集大气样品,然后用便携式GC-MS进行检测.该方法能快速、有效地对空气中的37种挥发性有机物进行定性和定量,具有相关性好(r>0.995)、检出限低(0.070×10-9 ～0.94×10-9 (体积分数))、精密度好(RSD小于7.7%)、准确度高(回收率为92% ～114%)的特点,适用于大气中挥发性有机污染物的应急监测.     

用原子荧光法测定食品中总砷的经验介绍

由于氢化物原子荧光法具有方法简单、精密度好、灵敏度高、线性范围宽等优点,已在土壤、食品、化妆品等砷含量的测定中得到广泛应用.对该法测定食品总砷过程中还原剂与砷标准的反应时间与荧光强度值之间的关系进行了探讨,得出其最佳反应时间.     

A Facile Procedure for Conjugate Addition of Amines to Electron Deficient Alkenes with Metal Oxide as Catalyst

A novel efficient procedure has been developed for the conjugate addition of amines to electron deficient alkenes. A series of metal oxides was synthesized for catalyzing the conjugate addition of amines and alkenes. After optimizing the reaction conditions, SrO was chosen as the most efficient catalyst for the reactions. The results show that the catalyst is very efficient for the conjugate addition of amines to electron deficient alkenes with the excellent yields in several minutes. Operational simplicity...     

一类组合优化函数的若干研究

本文研究了一个组合优化问题.利用组合数论的理论,给出了计算优化函数的一个新方法,并确定了4≤4m≤120时优化函数g(4m,6)的准确值,以及相心的优化向量.