排序方式: 共有66条查询结果,搜索用时 31 毫秒
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Karami Malihe Hasaninejad Alireza Mahdavi Hossein Iraji Aida Mojtabavi Somayeh Faramarzi Mohammad Ali Mahdavi Mohammad 《Molecular diversity》2022,26(5):2393-2405
Molecular Diversity - A green and efficient one-pot multi-component protocol was developed for the synthesis of some novel dihydrochromeno[4,3-b]pyrrol-3-yl derivatives through the reaction of... 相似文献
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Alireza Feizbakhsh Ali Aghassi Ali Ehsani Malihe A. Jamaat Ali Naeemy Iman Danaee 《中国化学会会志》2012,59(9):1086-1093
In this study we investigated the electrocatalytic oxidation of anti‐inflammatory drug (paracetamol) on Nickel and Nickel–copper alloy modified glassy carbon electrodes (GC/Ni and GC/NiCu) in alkaline solution. These electrodes prepared by galvanostatic method and different electrochemical techniques such as cyclic voltammetry and chronoamperometry were used to track the oxidation process and its kinetics. From Voltammetric studies we concluded that in the presence of drugs the anodic peak current of low valences Nickel species increased, followed by a decrease in the corresponding cathodic current peak. This indicates that drugs were oxidized on the redox mediator which was immobilized on the electrode surface via an electrocatalytic mechanism. Using Laviron's equation, the values of α and ks for the immobilized redox species were determined. The anodic peak currents show linear dependency with the square root of scan rate. This behavior is the characteristic of a diffusion controlled process. Under the CA regime the reaction followed a Cottrellian behavior and the diffusion coefficient of paracetamol was found in agreement with the values obtained from CV measurements. 相似文献
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Maaroof Zarei Aliasghar Jarrahpour Edris Ebrahimi Malihe Aye Seid Ali Torabi Badrabady 《Tetrahedron》2012,68(27-28):5505-5512
A modified traditional preparative chromatographic column can be used to achieve quantitative N-dearylation of N-(alkoxyphenyl), N-(alkoxynaphthyl), and N-(alkoxybenzyl)-2-azetidinones under mild conditions. Starting materials are charged on top of the column and the pure N-unsubstituted 2-azetidinones leave the column minutes later without need for other purifications. The yields are good-to-excellent and the reaction condition is mild, easy, efficient, and cheap. 相似文献
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Negin Fasih Ramandi Farzaneh Shemirani Malihe Davudabadi Farahani 《Mikrochimica acta》2014,181(15-16):1833-1841
We demonstrate the application of an ionic liquid-based ferrofluid to the dispersive solid phase extraction of lead(II) using PAN as the chelator. The ionic liquid contains silica nanoparticles with a magnetic core as the dispersion medium, and its use results in improved stability of the colloidal dispersion and a complete extraction of lead(II) within a few seconds. In addition, there is no need for centrifugation. Specifically, the effect of different variables on the extraction of lead(II) was studied using an experimental design. Lead(II) was quantified by AAS. Under optimized conditions, the calibration graph for lead(II) is linear in the range from 5 to 372 μg L?1, the relative standard deviation is 1.34 % (for n?=?7), the limit of detection is 1.66 μg L?1, and the enrichment factor is 200. The maximum adsorption capacity of sorbent was calculated to be 10.7 mg g?1, and adsorption follows a Langmuir isotherm. Figure
A schematic view of D-SPE experimental set up. We demonstrate the application of an ionic liquid-based ferrofluid to the dispersive solid phase extraction of lead(II) using PAN as the chelator. The ionic liquid contains silica nanoparticles with a magnetic core as the dispersion medium 相似文献
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Malihe Sadat Hosseiny Gholam Hossein Rounaghi Hamid Sadeghian 《Russian Journal of Inorganic Chemistry》2011,56(5):816-823
The competitive metal ion transport of copper(II), cobalt(II), zinc(II), cadmium(II), silver(I), chromium(III) and lead(II)
with a S-O donor compound was examined. Competitive transport experiments involving the metal cations from an aqueous source
phase through an organic membrane into an aqueous receiving phase have been carried out using 5,12-di(phenoxymethyl)-1,4-dioxa-7,10-dithiacyclododecane-2,3-dione
as the ionophore present in the organic phase. Fluxes and selectivities for competitive metal cations transport across bulk
liquid membranes have been determined in a variety of chlorinated hydrocarbon and aromatic hydrocarbon solvents. The membrane
solvents include: dichloromethane (DCM), chloroform (CHCl3), 1,2-dichloroethane (1,2-DCE), and nitrobenzene (NB) and also in chloroform-dichloromethane (CHCl3-DCM) and chloroform-nitrobenzene (CHCl3-NB) binary mixtures. Although the selectivity for silver(I) cation in all of these organic solvents is fundamentally similar,
but the most transport rate for Ag(I) was obtained in dichloromethane. The sequence of transport rate for silver ion in organic
solvents was: DCM > CHCl3 > 1,2-DCE > NB. A linear relationship was observed between the transport rate of silver ion and the composition of CHCl3-DCM, but a non-linear behavior was observed in the case of CHCl3-NB binary solution. The influence of the stearic, palmetic and oleic acids as surfactant in the membrane phase on the transport
of the metal cations was also investigated. 相似文献