固载化环糊精与污染物的吸附作用

通过固载化环糊精与污染物的作用,探讨了固载化环糊精与污染物的结合形态及方式。实验结果表明:固载化环糊精对苯酚和苯胺的吸附主要是物理吸附,对金属离子以化学吸附为主。     

固载化金属酞菁(MPc)催化性能的研究——Ⅱ.MPc通过配位连接在硅胶上及其对O_2的活化作用

用有机合成的方法在硅胶表面连接上可与MPc配位的有机基团——(CH_2)_3N(C_2H_5)_2,MPc与之配位从而固载在硅胶上。UV-Vis漫反射光谱表明硅胶表面存在MPc。用ESR研究固载化MPc与O_2的作用,证明固载化CoPc、FePc可以与O_2作用产生O_2~-,CuPc则不能。     

环丙烷化反应中催化剂固载化的研究进展

总结了近年来关于环丙烷化反应中催化剂固载化的研究进展,包括非手性催化剂与手性催化剂的固载化,其中手性催化剂的固载化包括Schiff碱-铜、手性卟啉-钌、吡咯烷酮羧酸酯-铑、吡咯烷-金属、双唑啉-金属及手性二磺胺等催化剂的固载化.另外,还讨论了离子液体与氟两相体系在该领域的应用研究.     

固载化酶催化合成多肽的研究进展

评述了溶剂、载体性质与固载化方法、pH值、底物浓度以及反应温度等因素对固载化酶催化合成肽反应的影响,并概括了固载化酶催化合成生物活性肽、寡肽等方面的研究与应用.     

卟啉化合物的固载化及其应用的研究概况

卟啉是一类重要的大环化合物,广泛存在于自然界和生命体中,具有广泛的应用。 由于自由卟啉化合物的化学稳定性差,天然卟啉通常在特定的天然大分子(多肽)环境中发挥其特性,因此,人们研究开发了多种担体,固载化卟啉和金属卟啉,大大拓展了其应用范围。 本文综述了文献报道的卟啉及金属卟啉的常用固载载体、常用的固载方法、以及固载型卟啉化合物在催化和传感器等领域的最新应用进展,展望了卟啉的固载化和固载型卟啉的应用前景。     

卟啉化合物的固载化及其应用的研究概况

卟啉是一类重要的大环化合物,广泛存在于自然界和生命体中,具有广泛的应用。由于自由卟啉化合物的化学稳定性差,天然卟啉通常在特定的天然大分子(多肽)环境中发挥其特性,因此,人们研究开发了多种担体,固载化卟啉和金属卟啉,大大拓展了其应用范围。本文综述了文献报道的卟啉及金属卟啉的常用固载载体、常用的固载方法、以及固载型卟啉化合物在催化和传感器等领域的最新应用进展,展望了卟啉的固载化和固载型卟啉的应用前景。     

固载化催化剂在烯烃氧化合成醛酮中的应用

总结了固载化催化剂在烯烃氧化合成醛酮中的应用。着重介绍了钯配合物固载在无机载本上,钯盐和杂多化合物固载在无机载体上,钯盐固载在化催化剂在烯烃氧化合成醛酮中的应用。对负载型液相催化剂,负载型水相催化剂,负载型熔融盐Wacker催化剂,活性C固载的Pd膜及Pt膜催化剂催化烯烃氧化合成醛酮也作了简单介绍。     

β-环糊精的固载及其应用最新研究进展

环糊精由于其优异的结构特征和物理化学性质,已成为构筑各种功能材料的优良结构单元.本综述以β-环糊精的共价固载为主,详细综述了目前β-环糊精的固载及其应用最新研究进展,主要包括固载化β-环糊精在环境污染物吸附、药物分子的负载和缓释、分析检测、手性分离、催化、织物整理和表面功能化等领域的应用.上述各部分,根据载体或应用方式的不同,系统介绍了β-环糊精的固载及固载化β-环糊精的性能.指出固载化β-环糊精在催化和表面功能化领域的应用虽然目前还处于起步阶段,却极具研究价值,对固载化β-环糊精进一步的功能化是今后基于β-环糊精构筑超分子仿生催化体系的主要研究方向.     

固载化金属酞菁(MPc)催化性能的研究——Ⅰ.在NaY上直接合成MPc

固载化的配位催化剂兼具均相和多相催化剂的优点,因此,均相配合物催化剂的固载化是近来很活跃的研究领域。金属酞菁在有机物的均相催化氧化中有不少报导,但对固载化的金属酞菁研究得不多。我们试图把过渡金属酞菁固载化并研究其在氧化反应中的催化行为。本文讨论的是在NaY上直接合成金属酞菁配合物。     

交联聚丙烯酸固载化氧化β-环糊精的合成及其对尿素的吸附性能

大孔交联聚丙烯酸树脂(D151和D152)用氯化亚砜转化为酰氯后,通过成酯反应固载β-环糊精,再进一步用高碘酸钠氧化,合成出具有环状多醛结构的交联聚丙烯酸固载化氧化β-环糊精。系统研究了反应条件对β-环糊精固载化反应的影响,发现摩尔投料比(—COC1/β-CD)为1.5—1/1、温度80℃、时间24 h为最佳固载反应条件。探讨交联聚丙烯酸固载化氧化β-环糊精对尿素的吸附性能,阐明了吸附时间、溶液中尿素浓度、及介质pH值等对吸附量的影响。在尿素浓度130 mg/dL、吸附时间4h、介质pH 7、温度25℃时,交联聚丙烯酸固载化氧化β-环糊精对尿素呈现出最大吸附量82.13 mg/g。     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

酞菁染料的金属化和溴化与光物理影响的研究

以α位(2,4-二特戊基)苯氧基邻苯二腈作为环合前体,制备了多种金属酞菁,产物经元素分析、紫外、红外、核磁氢谱等分析手段进行表征.并选择了部分酞菁进行溴化,其中着重研究了不同中心金属以及溴化对染料Q带吸收的影响.结果表明,酞菁染料的金属化对于其Q带吸收影响很大,多数染料金属化后会出现蓝移,而选择合适的条件进行溴化,可以使得金属酞菁的Q带吸收出现一定程度的红移,其中部分溴化金属酞菁的吸收波长与光信息产业中使用的近红外激光器很接近,具有潜在的实用价值.     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Time,gravity and the exterior angle of parallelism

Applying calculus to the horizontal and vertical unit hyperbolas we derive the obtuse exterior and the acute angle of parallelism formulas for the arc length of a unit circle. When the analogous arc length of a hyperbola is figured, we further define metric distance with radian measure. Employing a non-conventional velocity of light formula, we explain several aspects of physics with a logical geometry. The hyperbolic geometry Lobacevskii angle of parallelism is mathematically measured to agree with the physical measure, without using the gravitational constant, but rather the electromagnetic spectrum and geodesics. Space is hereby measured with units of radians and time. Half-angle formulas for slopes and boosts pertain to spinor algebra. The new light velocity is justified when its derivative results in Einstein's mass–energy formula. Relativity is reformulated with these half-angle formulas.     

室温氧化还原反应制备AgCuSe三元纳米棒

AgCuSe nanorods were prepared at room temperature by a redox reaction. The as-prepared product was characterized by X-ray powder diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy.X-ray powder diffraction shows that the as-prepared product is the tetragonal phase of AgCuSe. Transmission electron microscopy shows that the sample consists of nanorods with a diameter varying from 5 nm to 20 nm and a length varying from 200 nm to 600 nm. X-ray photoelectron spectroscopy shows that the purity of the sample is high. The formation mechanism of AgCuSe and the growth mechanism of AgCuSe nanorods were discussed.Thermodynamic calulations show that the final product in the synthetic system is pure AgCuSe. The solvent ethylenediamine did not only acts a didentate ligand to form relatively state Ag + and Cu + complexes, but also dissolved Se and enhanced the reactivity of Se. It played an important role in controlling the nucleation and growth of AgCuSe nanorods.     

Umsetzung von Metall- und Metalloidverbindungen mit mehrfunktionellen Molekülen, 22. Mitt.: Die Reaktion von Trimethylsilylcarbonsäureamiden mit Halogen(diorganyl)boranen

Trimethylsilylacetamide and trimethylsilyltrifluoroacetamide react with halogenodiorganylboranes to monomeric or dimeric amidoboranes depending on the organyl substituents. The compounds were characterized analytically and spectroscopically (NMR:¹H,¹⁹F,¹¹B; MS; IR).

21. Mitt.:A. Meller, W. Maringgele, K. Hennemuth undU. Sicker, J. Z. anorg. allg. Chem., im Druck.     

Vapour-liquid equilibria in nonpolar mixtures : II. Carbon tetrachloride with alkylbenzenes and n-alkanes at 313.15 K

Góral, M. and Zawadzki, S., 1993. Vapour-liquid equilibria in nonpolar mixtures. II. Carbon tetrachloride with alkylbenzenes and n-alkanes at 313.15 K. Fluid Phase Equilibria, 90: 355-364.

Total vapour pressure measurements using a modified static method at 313.15 K are reported for binary mixtures of CCl₄ with benzene, toluene, o-xylene, p-xylene, hexane, heptane, octane, nonane and decane. The results were correlated with the generalized Redlich-Kister equation for excess Gibbs energy. A comparison with literature vapour-liquid equilibrium data and excess enthalpy was made. Consistency within homologous series was checked. Predictions made using the UNIFAC method and the Hildebrand-Scatchard equation were compared.     

碱性介质中葡萄糖在铂电极上的阳极氧化

为了进一步探明葡萄糖在铂电极上的氧化机理,用循环伏安法(CV)在-0.9～0.4 V(相对于饱和甘汞参比电极)内研究了葡萄糖在铂电极上催化氧化行为,首次详细报道了葡萄糖在电化学氧化过程中的电位振荡现象,并用电流扫描法表征了葡萄糖的电位振荡情况.电流扫描结果表明,在较慢的电流扫描速度下,电极过程出现了明显的电位振荡.说明电极上产生了毒化中间物,电位振荡是由于毒化中间物在电极上的吸附和在高电位下氧化除去引起的.     

甘氨酸燃烧法合成纳米ZnO-MgO及其紫外光发射

ZnO-MgO nanocomposite was prepared by glycine nitrate combustion method.Its photoluminescence property, the structure and annealing temperature dependence was studied by XRD, FTIR and SEM. The results show that the photoluminescence property of ZnO-MgO nanocomposite is greatly improved compared with that of pure ZnO. Under 325 nm laser excitation, the emission spectra of the 900 ℃ treated composite sample had an obviously enhanced ultraviolet (UV) band centered at 385 nm at room temperature. The luminescence intensity of the UV band became stronger with the increase of annealing temperatures and reached a maximum at 900 ℃ but decreased at 1000 ℃. The photoluminescence intensity was mainly affected by the grain size, the crystallization and the action between ZnO and MgO nanoparticles. In addition, an appropriate G/N value was favorable for improving the UV-PL properties of the nanocomposite samples.