红磷增效Al（OH）3／Mg（OH）2阻燃的聚丙烯结晶形态

借助宽角Ｘ－射线衍射、差热分析、偏光显微镜对红磷增效Ａｌ（ＯＨ）ａ和Ｍｇ（ＯＨ）２混合填充的阻燃聚丙烯体系的结晶形态进行了研究。发现这种体系中不仅出现ａ型而且还出现β型聚丙烯晶体。β型晶体可能是由于Ａｌ（ＯＨ）ａ和Ｍｇ（ＯＨ）ａ协同诱发而生成的。     

微乳液在光度分析中的应用

文中对微乳液的特性与分类,及其在吸光光度分析中的应用及增敏作用机理作了评述。     

分子内环加成的甾体全合成

近年来,分子内环加成反应已广泛用于甾体化合物全合成,其主要一步是由取代的苯并环丁烯热裂而成的5,6-二亚甲基-1,3-环己二烯发生区域专一和立体选择性的环加成反应,构成甾体骨架。现在用此法已合成了一系列消旋和光学活性的甾体化合物。     

SiO_2负载钼催化剂的合成及其催化乙烯二聚、同系化和歧化的反应性能

从单核及双核二甲胺钼络合物出发,制备了SiO_2负载的钼催化剂。程序升温分解实验(TPDE)及红外测试表明,双核钼络合物与SiO_2作用生成双钼中心物种,此物种可催化乙烯的二聚反应。280℃活化后此双钼中心物种变成单钼中心物种,单钼物种只催化乙烯的同系化及歧化反应。     

Conformation dependence of electronic structures of poly(ethylene oxide)

The electronic structure of pure poly(ethylene oxide) (PEO) for four different polymeric chain conformations has been studied by Hartree-Fock (HF) and density functional theory (DFT) through the analysis of their valence band photoelectron spectroscopy (VB-PES), X-ray emission spectroscopy (XES), and resonant inelastic X-ray scattering (RIXS). It is shown that the valence band of PEO presents specific conformation dependence, which can be used as a fingerprint of the polymeric structures. The calculated spectra have been compared with experimental results for PEO powder.     

Structure and magnetism of Eu2IrD5

A powder neutron diffraction study of Eu¹⁵³₂IrD₅ has shown it to be isostructural with Sr₂IrD₅ at room temperature. Unlike the latter compound, it does not undergo a deuterium-ordering transition at low temperatures. Magnetic scattering at helium temperatures confirms the suggestion that it becomes ferromagnetic below 20 K with a moment corresponding to that of divalent europium.     

5′-鸟苷酸与茜素红S的反应及其在分析化学中的作用

采用UVVis光谱法研究了茜素红S(ARS)与5′鸟苷酸(5′GMP)在pH4.80的弱酸性缓冲溶液中生成络合物的结合反应。与试剂比较,络合物的最大吸收峰红移92nm,测得络合物和表观摩尔吸光系数为ε=1.3×104L·mol-1·cm-1;最大结合数n=10;浓度线性范围0.2～16mg/L;检出限为6.1×10-8mol/L。研究了ARS与5′GMP是分子间作用力的结合反应,并对时间、温度、离子强度对结合反应的影响,以及无机物、生物物质对反应体系的干扰情况进行了初步研究。     

Synthesis and Crystal Structure of Trigadolinium Bromoorthosilicate，Gd_3Br（SiO_4）_2

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＴｒｉｇａｄｏｌｉｎｉｕｍＢｒｏｍｏｏｒｔｈｏｓｉｌｉｃａｔｅ，Ｇｄ_３Ｂｒ（ＳｉＯ_４）_２ＭａｏＪｉａｎｇ－Ｇａｏ；ＺｈｕａｎｇＨｏｎｇ－Ｈｕｉ；ＨｕａｎｇＪｉｎ－Ｓｈｕｎ（ＳｔａｔｅＫｅ?..     

Molecularly imprinted sol-gel nanotubes membrane for biochemical separations

In this study, we report a simple procedure for applying molecular imprinting functional groups to the inner surfaces of the template-synthesized sol-gel nanotubes for chemical separation of estrone. The silica nanotubes were synthesized within the pores of nanopore alumina template membranes using a sol-gel method by simultaneous hydrolysis of a silica monomer-imprinted molecule complex and tetraethoxysilane (TEOS). A covalent imprinting strategy was employed by generating a sacrificial spacer through the reaction of the isocyanate group of 3-(triethoxysilyl)propyl isocyanate and a phenol moiety of estrone to form a thermally cleavable urethane bond. This allowed us to remove the imprinted estrone by simple thermal reaction and to simultaneously introduce functional groups into the cavity formed by the silica nanotubes. Experiments indicated that estrone could be bound selectively by such an approach and have a binding affinity of 864 +/- 137 (n = 3).