介孔Al2O3负载KF催化剂的制备及其催化性能

介孔Al2O3;KF;催化;固体碱;氧烷基化     

Influence of Surface Structures on Quality of CdTe(100) Thin Films Grown on GaAs(100) Substrates

We report the epitaxial growth of single-crystalline Cd Te(100) thin films on Ga As(100) substrates using molecular beam epitaxy. By controlling the substrate pre-heated temperature with adjustable Te flux, three different reconstructed surfaces are realized, and their influence on the subsequent Cd Te growth is investigated. More importantly, we find that both the presence of a thin native oxide layer and the formation of Ga-As-Te bonds at the interface enable the growth along the(100) orientation and help to reduce the threading dislocations and other defects. Our results provide new opportunities for compound semiconductor heterogeneous growth via interfacial engineering.     

1,2-苯并噻嗪类化合物的设计、合成及抗肿瘤活性研究

依据生物电子等排原理,设计合成了13个全新结构的1,2-苯并噻嗪类化合物,其结构均经IR,1H NMR,13C NMR和MS确证.以A431,A549,MDA-MB-468和HL60 4种细胞株为活性筛选对象,采用四甲基偶氮唑盐(MTT)法进行初步的体外抗肿瘤活性研究.结果表明,部分化合物对肿瘤细胞有一定的抑制活性,其中化合物5b对A431具有显著的抑制活性,IC50值为1.57μmol/L,化合物9a对A431,A549和MDA-MB-468 3种细胞株的抑制活性均强于阳性对照药gefitinib.并采用Moe软件对所合成的化合物与表皮生长因子受体(EGFR)结合位点进行对接,以进一步阐释所合成化合物的作用靶标.     

一水合(E)-N'-(5-氯-2-羟基苯亚甲基)-2-(8-羟基喹啉基)-乙酰肼Schiff碱的合成及其晶体结构

在甲醇溶液中,5-氯水杨醛和8-羟基喹啉乙酰肼经缩合反应合成了新化合物--一水合(E)-N'-(5-氯-2-羟基苯亚甲基)-2-(8-羟基喹啉基)-乙酰肼Schiff碱(1),其结构经1H NMR,IR,元素分析和X-射线单晶衍射表征.1属正交晶系,P2_12_12_1空间群,晶胞参数:a=4.748(5) (A),b=15.818(14) (A),c=22.802(2) (A),α=β=γ=90.00 °,V=1 712.0(3) (A)~3,Z=4,Dc=1.450 g·cm~(-3),μ=0.253 mm~(-1),F(000) =776,R_1=0.072 5,wR_2=0.102.1通过氢键相互作用,连接成一维无限链结构.     

A Novel Observation of ＂a Sharp Absorption Line＂ Using Much More Broad Laser Lights： Quantum Interference in the Autoionization Spectra of Sc

The most accurate measturements in physical sciences will be precision spectroscopic experiments which are based on the usage of most narrow lines in cooperation with interference phenomena. We present a novel experimental observation of ＂a sharp absorption resonance line＂ with much more broad laser lights. The mechanism of such a novel phenomenon will be elucidated and its implications will be discussed.     

铜(Ⅱ)-牛磺酸缩2-吡啶甲醛席夫碱-3,5-二羟基苯甲酸三元配合物的合成及其晶体结构

牛磺酸缩2-吡啶甲醛席夫碱,3,5-二羟基苯甲酸与醋酸铜在50%甲醇中反应合成了铜(Ⅱ)-牛磺酸缩2-吡啶甲醛席夫碱-3,5-二羟基苯甲酸三元配合物{[Cu(C8H9N2O3S)(C7H6O4).(H2O)2].2H2O(1)},其结构经IR,元素分析和X-射线单晶衍射法表征。1属三斜晶系,空间群P-1,晶胞参数a=7.066(2),b=11.891(4),c=12.859(4),α=104.034(14)°,β=96.884(13),°γ=99.053(10)°,V=1020.9(6)3,Z=2,Dc=1.633 g.cm-3,μ=1.233 mm-1,F(000)=518,R1=0.1108,wR2=0.322。1的中心铜离子与席夫碱配体的两个N原子,3,5-二羟基苯甲酸羧酸根上一个O原子以及两个水分子的O原子配位,形成一个五配位的四方锥结构。由结晶水分子,没参与配位的磺酸基氧,配位水分子间形成的氢键以及吡啶环、苯环间的π┈π相互作用,使1分子堆积成三维超分子网状结构,稳定了整个晶体结构。     

Effect of Electron Correlations and Breit Interactions on Ground-State Fine-Structures along the Nitrogen-Like Isoelectronic Sequence

The accurate atomic data of nitrogen and nitrogen-like ions have an importance role in fusion plasma studies and astrophysics studies. The precise calculation of fine-structures is required to obtain such atomic data. Along the whole nitrogen isoelectronic sequence, the contributions of the electron correlations, the Breit interactions and the quantum electrodynamics corrections oi1 the ground-state fine-structures are elucidated. When Z is low, the electron correlations are important, and the Breit interactions, which cannot be neglected cause interesting anomalous fine-structure splittings. When Z is high, the electron correlations are less important, and the Breit interactions are important in addition to spin-orbit interactions for precise calculations.     

水杨酰芳胺类化合物的设计、合成及体外抗肿瘤活性研究

根据骨架迁跃原理,设计并合成了一系列具有酪氨酸激酶抑制剂拉帕替尼(Lapatinib)和诺拉替尼(Neratinib)结构片段的水杨酰芳胺类化合物,其结构均经IR,1H NMR,13C NMR和MS确证.采用四甲基偶氮唑盐(MTT)法考察所合成化合物的体外抗肿瘤细胞(A549,MCF-7,SGC-7901,Bel-7402)活性.结果表明,所合成的化合物对4种肿瘤细胞增殖均有一定的抑制活性,部分化合物的活性强于阳性对照药吉非替尼(Gefitinib).     

Synthesis and Crystal Structure of a New 2D O-bridged Copper(Ⅱ) Coordination Polymer Constructed from Sulfonate-derived Schiff Base

A new chain-like coordination polymer, namely, [CuL ]n(1, Na2 L = 2-[(2-hydroxybenzylidene)-amino]-benzenesulfonic acid sodium salt), has been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy and elemental analysis. Complex 1 crystallizes in monoclinic system, space group P21/c with a = 9.2296(16), b = 10.4754(18), c = 12.200(2) A, β =102.392(2)°, V = 1152.0(3) A3, C13H9 CuN O4S, Mr = 338.83, Dc = 1.953 g/cm3, Z = 4, F(000) = 684,μ = 2.089 mm-1, the final R = 0.0376 and w R = 0.0956. X-ray diffraction analyses indicate that 1displays a square-pyramidal metal center with NO4 donor sets. The sulfonate-derived Schiff base serves as a common N,O,O′-tridentate and a unique O-bridged ligand connecting the metals.Dinuclear copper complexes serve as secondary building blocks(SBUs) to construct an unusual2 D coordination network. In the crystal, the components form a stable 3D supramolecular architecture by C–H···O interactions and π-stacking.     

新型噻吩并四氢吡啶芳酸醚类化合物的合成及其抗血小板聚集活性

运用生物电子等排及拼合设计原理,设计并合成了14个新型的噻吩并四氢吡啶芳酸醚类化合物(4a~4j和8a~8d),其结构经1H NMR,13C NMR和ESI-MS表征。采用Bron比浊法测定了4a~8d对腺苷二磷酸(ADP)和花生四烯酸(AA)诱导的血小板聚集抑制活性。结果表明:4-【3-{6,7-二氢噻吩并[3,2-c]吡啶-5(4H)-基}丙氧基】-苯甲酸对AA诱导的血小板聚集和4-【3-{6,7-二氢噻吩并[3,2-c]吡啶-5(4H)-基}丙氧基】-3,5-二甲氧基苯甲酸对ADP诱导的血小板聚集均显示出较强的抑制活性,其IC50分别为0.020 mmol·L-1和0.018 mmol·L-1。