A general microcantilever surface modification method using a multilayer for biospecific recognition

The key to microcantilever surface modification technology is to selectively modify one side of a microcantilever surface with molecular recognition layers. In this paper, we report a general microcantilever modification method using a multilayer film.     

Supramolecular formation by aromatic ring stacking and hydrogen bonding in lanthanide(III) complexes with amino acids and 1,10-phenanthroline

[Eu(ABA)(phen)₂(H₂O)₃](ClO₄)₃·3phen·4.5H₂O (1) and [Eu(Val)(phen)₂(H₂O)₃](ClO₄)₃·3phen·2H₂O (2) are two new europium complexes with amino acids and 1,10-phenanthroline (phen=1,10-phenanthroline, ABA=-amino butyl acid, Val= -valine). Their crystal structures were measured by X-ray crystallography. Europium atoms in both complexes are nine-coordinated with bidentate 1,10-phenanthroline and carboxylate anion of amino acids, and water molecules. In the solid state, 1 and 2 have a structure involving aromatic stacking of the coordinated and non-coordinated 1,10-phenanthroline and the oxygen atoms of non-coordinated perchlorate anions being H-bond acceptors connect [Eu(ABA)(phen)₂(H₂O)₃]³⁺·3phen·4.5H₂O or [Eu(Val)(phen)₂(H₂O)₃]³⁺·3phen·2H₂O in their structures. In their interactions, several C–HO bonds play an important role. Owing to their different amino acid ligands and the number of lattice water molecules, there is some difference in their hydrogen bond patterns in 1 and 2. The side chain of -valine is involved in the formation of C–HO bonds. Hydrogen bond and π–π interactions determine the supramolecular formation of three-dimensional net works of both complexes.     

以四硝基铝酞菁为荧光探针测定葡萄糖的荧光分析新方法

建立以四硝基铝酞菁为荧光探针测定葡萄糖的荧光分析新方法。方法基于四硝基铝酞菁苯环上的硝基与葡萄糖发生还原反应,形成铝酞菁的氨基化产物;氨基化铝酞菁具有红区激发和发射的特性,在强酸性介质中可发射较强荧光;体系的荧光强度和葡萄糖的含量呈良好的线性关系,并具有较好的准确性和稳定性。方法用于测定发酵样品中的还原糖,结果满意。     

由水杨醇衍生的二苯并冠醚的合成和构型

将水杨醇在ＤＭＦ中与ＮａＨ和二甘醇或三某醇二对甲苯磺酸酯反，合成了２个新的二苯并冠醚（１和２），其结构由元素分析和波谱分析所表征，１ 射线衍射分析确定为反位构型，提出了合成反应的机理。     

铟(Ⅲ)-向红菲啰啉络合物极谱吸附波的研究

在pH=3.8的磷酸柠檬酸盐缓冲体系中,铟(Ⅲ)-向红菲(口罗)啉络合物在单扫描示波极谱仪上于-0.67 V(vs.SCE)处产生一灵敏的吸附还原波,其二阶导数波灵敏度高,波形好.峰电位Ⅰ~O_P与钢(Ⅲ)浓度在 2.0X10~(-8)~2.0X10~(-6)mol/L范围内呈良好的线性关系,其检测限为8X10~(-9)mol/L铟(Ⅲ).该法用于试剂氧化锌和镀膜玻璃中铟(Ⅲ)的恻定,结果较好.     

套索冠醚毛细管色谱柱的研制

用套索冠醚N,N′-双(2-甲基吡啶)-二氮杂-18-冠-6作为固定相,涂渍在弹性石英毛细管内,测其柱效、惰性、热稳定性、平均极性及选择性等性质.其结构由元素分析、红外光谱、核磁共振及质谱分析的试验数据所证实.试验表明,它具有良好的色谱性能、中等极性,适用于对醇、卤代烃、芳香烃等各类异构体的分离,并用分子结构观点探讨了保留机理.     

3,4-二氨基呋咱基氧化呋咱异构体的合成与表征

将含能化合物3-氨基-4-氯肟基呋咱(ACOF)在低温下用稀碱处理后发生过渡中间体3-氨基-4-氰基呋咱氧化物(ACFO)的二聚关环反应合成了新型呋咱类含能化合物3,4-二氨基呋咱基氧化呋咱异构体(DAFF iso-m er),产率达66.3%。培养了DAFF isom er的单晶。用四圆单晶X-射线衍射仪,1H NMR,13C NMR,IR,MS及元素分析对其结构进行了表征。结果表明:DAFF isom er晶体属三斜晶系,空间群P-1,分子呈平面构型,层状晶体内存在分子内和分子间氢键,晶胞堆积层间不存在氢键。     

Reactions of Laser Ablation-magnesium Plasma with Methanol Clusters

IntroductionReactions of metal ions with neutral molecules orclusters produce a variety of metal complex ions andother new series of cluster ions including cations andanions.The laser ablation-molecular beam(LA-MB)method has marked its relevance in the st…     

超细粉Pb0.75Ca0.25[(Ni1/3Nb2/3)0.08Ti0.912Mn0.008]O3的制备与表征

报道了用化学共沉淀法制备掺杂Ca、Ni、Nb、Mn钛酸铅超细陶瓷粉末的方法。制得的粉料化学式为:Pb_0.75Ca_0.25[(Ni_1/3Nb_2/3)_0.08Ti_0.912Mn_0.008]O₃,粒径小于0.1μm,所有的掺杂元素均能定量掺入。     

Adsorption of an amphipatic copolymer on a kidney dialysis membrane

We have studied the adsorption of a copolymer of acrylonitrile and methacrylate of nonaethyleneglycol on a kidney dialysis membrane, which contains mostly nitrile groups. The kinetics study reveals at first a rapid increase of the adsorbance, followed by slow variations suggesting rearrangements at the interface. The isotherms do not present a true plateau at high concentration. The high adsorbance observed at low pH or high salt concentration could be related to the ability of polyethyleneoxide to form a complex with cations.