摘要：
This article presents an original work aiming at kinetically surveying the substrate‐selective mechanism from a molecularly imprinted polymer. With Bisphenol A (BPA) as the template, the imprinted polymer was prepared. The result indicates that the imprinted polymer presents a much more complicated sorption toward the template than toward its analogue. The rate constant in the case of the template appears to be a function of coverage degree. There are also significant deviations from the idealized Langmuir model. Related information indicates that these logically can be a result from the induced molecular memory within the binding framework, which makes the polymer capable of selectively adsorbing the imprint species.
作者机构：
[Wang, Li; Liu, Zhigang; Huang, Bei] Shenzhen Univ, Coll Life Sci, Shenzhen 518060, Peoples R China.;[Huang, Bei] Cent China Normal Univ, Dept Chem, Key Lab Pesticides & Chem Biol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Wang, Li] S;Shenzhen Univ, Coll Life Sci, Shenzhen 518060, Peoples R China.
摘要：
In the title compound, [Cd(dien)2]I2, where dien = diethyl-enetriamine (C4H13N3), the CdII ion is in a distorted octa-hedral coordination environment. In the crystal structure, inter-molecular N - H⋯I hydrogen bonds link cations and anions into a three-dimensional network.
摘要：
An important building block, diethyl [(5-amino-4-cyano-3-methylsulfanyl-pyrazol-1-yl)-(4-fluorophenyl)methyl] phosphonate (3) was efficiently synthesized via the condensation of 1-hydrazino-1-(4-fluorophenyl)methyl phosphonate (1) with 2-[bis(methylthio)methylene]malononitrile (2).3 reacted with triethyl orthoformate to afford diethyl [(4-cyano-5-ethoxymethyleneamino-3-methylsulfanyl-pyrazol-1-yl)-(4-fluorophenyl)methyl] phosphonate (4), which reacted with various acyl hydrazines in refluxing 2-methoxyethanol to provide the target compounds (5) in good yields directly. The results of preliminary bioassay indicated that compounds 5 possess potent herbicidal activity against the roots of monocotyledonous (barnyard grass) and dicotyledonous (oil rape) plants, and could be further developed as potential herbicides.
摘要：
The syntheses of some diheterocyclic compounds from 2-thioacetohydrazide- 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine (1) are described. Compound 1 can be converted into triazoles, 1,3,4-oxadiazoles, and 1,3,4-thiadiazoles. The structures of the intermediates and the target compounds were confirmed by 1H-NMR, MS and elemental analyses.
期刊：
Journal of Physical Chemistry C,2008年112(31):11929-11935 ISSN：1932-7447
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Mei, Tao; Liu, Juan; Xiao, Haiyan; Ai, Zhihui] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.;[Deng, Kejian] S Cent Univ Nationalities, Coll Chem & Mat Sci, State Ethn Affairs Commiss & Minist Educ, Key Lab Catalysis & Mat Sci, Wuhan 430074, Peoples R China.;[Qiu, Jianrong] Huazhong Univ Sci & Technol, Natl Coal Combust Lab, Wuhan 430074, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
In this study, rhodamine B (RhB) in aqueous solution was effectively degraded by an electro-Fenton (E-Fenton) system with a novel oxygen-fed gas diffusion electrode. This electrode was prepared by combining Cu2O nanocubes and multiwall carbon nanotubes with poly tetrafluoroethylene (Cu2O/CNTs/PTFE). The resulting Cu2O nanocubes and Cu2O/CNTs/PTFE composite cathode were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and transmission electron microscopy (TEM). The degradation of RhB in this E-Fenton system reached 80.2% and 89.3% in 120 min at neutral pH and pH 3, respectively. A pseudofirst-order kinetics was observed for the degradation of RhB in this E-Fenton system. We studied the factors affecting the degradation of RhB with Cu2O/CNTs/PTFE composite cathodes in detail, and detected hydrogen peroxide electro-generated through the reduction of O2 adsorbed on the cathode and copper ions produced by the slow leakage of Cu2O nanocubes. Cyclic voltammetry (CV) experiments revealed that a two-electron reversible redox reaction happened on the Cu2O/CNTs/PTFE cathode in this new E-Fenton system. More importantly, we found the Cu2O/CNTs/PTFE cathode was very stable and could be reused without catalytic activity decrease, suggesting its potential in the wastewater treatment.
作者机构：
[Feng-Yun Wang; Soofin Cheng] Department of Chemistry, School of Chemistry, Huazhong Normal University, Wuhan, China;[Ben-Zu Wan] Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan, Wuhan, China;[Feng-Yun Wang] School of Chemistry, Huazhong Normal University, Wuhan, China
通讯机构：
[Cheng, S.] D;Department of Chemistry, School of Chemistry, Huazhong Normal University, China
摘要：
One-step electrochemical deposition of gold nanoparticles (AuNPs) in chitosan hydrogel onto a planar gold electrode was used to create a favorable surface for the attachment of the enzyme acetylcholinesterase (AChE). AChE exhibited high affinity to its substrate of acetylthiocholine chloride (ATCl) from calculated Michealis-Menten constant (K-m(app)) of 0.309 mM. Thiocholine, the product through AChE-catalyzed hydrolysis of ATCl, could be chemisorbed on the surface with an applied potential of -0.7 V and then desorbed in KOH solution, giving a measurable peak current. When enzymatic activity was inhibited by organophosphate pesticides, the amount of chemisorpted thiocholine on the interface was anticipated to decrease. As a result, a simple method for rapid determination of malathion was established based on the chemisorption/desorption process of thiocholine used as an indicator. Under the optimal conditions, the decrease in response was proportional to the concentration of malathion from 0.1 to 20 ng mL(-1), with detection limit of 0.03 ng mL(-1) (0.1 nM). The method based on one-step electrochemical deposition and chemisorption/desorption process of thiocholin has potential application in high-sensitive pesticide determinations. (c) 2008 Elsevier B.V. All rights reserved.
