Browsing 化学化工－已发表论文 by Title
Now showing items 4760-4779 of 14235
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K and halogen binary-doped graphitic carbon nitride (g-C 3 N 4 ) toward enhanced visible light hydrogen evolution
(2019-09-29)Abstract(#br)Water splitting driven by solar energy to produce hydrogen, which is highly dependent on the designing of semiconductor photocatalyst, is an efficient technology to address energy shortage problems and environment ... -
K2CO3-Catalyzed Synthesis of Chromones and 4-Quinolones through the Cleavage of Aromatic C-O Bonds
(AMER CHEMICAL SOC, 2012-06-01)Phenol-derived electrophiles are favorable substrates because phenols are naturally abundant or can be readily prepared from other aromatic compounds. However, the cleavage of aromatic C-O bonds Is a great challenge because ... -
K_2O-Fe_2O_3系催化剂的穆斯堡尔谱研究
(1999)利用穆斯堡尔谱在k2 O fE2 O3催化剂中检出了α fE2 O3(大晶粒及微晶 )、kfEO2 、k1+ XfE11O17、α fEOOH和γ fEOOH等物相 ,它们的相对含量取决于催化剂的含钾量及煅烧温度 ,相对含量的改变导致样品的穆斯堡尔谱图出现了复杂的变化 .与Xrd相比 ,穆斯堡尔谱可对钾与氧化铁的相互作用进行更有效的表征 ,穆斯堡尔谱和TPr研究都表明钾可延缓催化剂中fE(III)的被还原 . -
Kalimeris integrifolia Turcz ex DC: An accumulator of Cd
(2009)Phytoremediation is a traditional technique that uses vegetation to remediate contaminants from water, soil and sediments. This is a solar-driven, aesthetically pleasing, and cost effective technology. In a former published ... -
KCaF_3结构相变的分子动力学模拟
(1998)基于无调节参数的gOrdOn-kIM势和一种检测离子运动的新技术，以kCAf3的分子动力学模拟结果为例，对钙钛矿AbX3的离子分子固体的结构相变作了探讨.包括对阱势、折叠结构、能垒、超离子态、稳定性骨架和离子分子集团bX6的“尺寸”和“形状”.以期对离子分子固体的结构相变有一个基本了解. -
Keeping the Ball Rolling: Fullerene-like Molecular Clusters
(AMER CHEMICAL SOC, 2010-02)The discovery of fullerenes in 1985 opened a new chapter in the chemistry of highly symmetric molecules. Fullerene-like metal dusters, characterized by (multi)shell-like structures, are one rapidly developing class of ... -
KETO-ENOL-TAUTOMERISM OF DIBENZOYLMETHANE IN ORGANIZED MEDIA
(1992)The keto-enol tautomerism of dibenzoylmethane (DBM) in organized media, e.g. beta-cyclodextrin and micelles (ionic and non-ionic), was monitored by ultraviolet absorption spectra. It was observed that the introduction of ... -
Ketopiperazinediacetate zinc and copper complexes in the degradation of ethylenediaminetriaceta
(ELSEVIER SCIENCE BV, 2011-04-02)Polymeric ketopiperazinediacetate complexes [M(kpda)(H(2)O)(2)](n)center dot H(2)O (M = Cu, 1; Zn, 2. H(2)kpda = ketopiperazinediacetic acid, C(8)H(12)N(2)O(5)) were obtained from the reactions of copper chloride and zinc ... -
Key Intermediates of Iodine-Mediated Electrophilic Cyclization: Isolation and Characterization in an Osmabenzene System
(WILEY-V C H VERLAG GMBH, 2013-Aug 2) -
KF/AL_2O_3/PEG4000(FAP)存在下氯仿的Michael加成反应
(1998)在kf/Al_2O_3/PEg4000(fAP)存在下,氯仿可与α,β-不饱和羰基化合物进行MICHAEl加成反应,得到中等产率的三氯甲基化合物。 -
KF/Al_2O_3催化1,2,3-苯并三唑N-烷基化
(1999)研究了用固体碱kf/Al2O3为缚酸剂，dMf为溶剂，以卤代烃为烷基化剂实现1，2，3-苯并三唑n-烷基化反应.不同的卤代烃，得到不同比例n1及n2烷基化产物，烷基化产率在57%~95%之间. -
Kinetic analysis of an enzyme-containing polymer modified electrode
(HIGHER EDUCATION PRESS, 1997)A theoretical model for enzyme-entrapped conducting polymer modified electrodes is proposed and appropriate expressions are derived for the steady-state current response of the enzyme electrode. More attention has been ... -
Kinetic analysis of reactions of p-anisidine and N-methyl-p-anisidine cation radicals in acetonitrile using an electron-transfer stopped-flow method
(J PHYS CHEM A, 2004-05-06)The chemical follow-up reactions after one-electron oxidation of p-anisidine (PA), N-methyl-p-anisidine (MPA), and N-benzyl-p-anisidine (BPA) in acetonitrile (AN) were analyzed with a stopped-flow method utilizing the ... -
Kinetic and Sensitive Analysis of Tyrosinase Activity Using Electron Transfer Complexes: In Vitro and Intracellular Study
(Wiley-VCH Verlag, 2014)Tyrosinase is an important marker of human diseases such as the neurodegeneration associated with Parkinson's disease and melanoma. Sensitive detection of tyrosinase activity in vitro and inside cells is of great significance ... -
Kinetic and spectroscopic studies of vinyl acetate synthesis over Pd(100)
(2006)A kinetic study of vinyl acetate (VA) synthesis over a Pd(100) catalyst is described, and the effect of particle-size on this reaction ascertained by comparing the single crystal data with data from supported Pd catalysts ... -
Kinetic energy and spatial distribution of ions in high irradiance laser ionization source
(ROYAL SOC CHEMISTRY, 2011-02-22)Characteristics of laser ionization in vacuum and low pressure background gas (He) have been investigated through the measurement of kinetic energy and spatial distributions of copper and tungsten ions. A Q-switched Nd:YAG ... -
Kinetic investigation of electron transfer reaction between trans- (en)(2)(NO2)Co(O2CC5H5N) (2+)/Fe(II)
(1996)trans - [(en)(2)(NO2)Co(O2CC5H5N)](2+) (ClO4)(2), which is first reported, has been synthesized and characterized by elemental analysis, UV - Vis and IR spectra, and X - ray structural analyses. Kinetic behaviours of the ... -
KINETIC INVESTIGATION OF THE REDUCTION FOR CROWDED [CO(TMEN)(3)](3+) BY [FE(CN)(6)](4-)
(HIGHER EDUCATION PRESS, 1995)Kinetic studies of the outer-sphere electron transfer reaction between [Co(tmen)(3)](3+) and [Fe(CN)(6)](4-) have been carried out at various temperatures and pH values. The ion-pair formation constant Q(ip) of the precursor ... -
Kinetic investigation on the confined etching system of n-type gallium arsenide by scanning electrochemical microscopy
(American Chemical Society, 2014 Augus)Confined etchant layer technique (CELT) has been proved an effective electrochemical microfabrication method for both 3D microstructures and a supersmooth surface. From a physical chemistry viewpoint, the confined etching ...