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1.
Saeed Bahadorikhalili Sayyad Mohammadi Mehdi Asadi Maliheh Barazandeh Mohammad Mahdavi 《中国化学会会志》2020,67(1):160-164
In this paper, multicomponent reaction of amine, carbon disulfide and fluoronitrobenzene is reported for the synthesis of nitrophenyl methylcarbamodithioate derivatives. The method is based on the nucleophilic attack of the activated methylcarbamodithioate salt to fluoronitrobenzene. Several starting materials are tested and successfully produced the corresponding nitrophenyl methylcarbamodithioate. A possible mechanism for the reaction is suggested. 相似文献
2.
Mehiaoui Nawel Kibou Zahira Berrichi Amina Bachir Redouane Choukchou-Braham Noureddine 《Research on Chemical Intermediates》2020,46(12):5263-5280
Research on Chemical Intermediates - The current work described a new and highly selective method for the synthesis of substituted 3-cyano-2-pyridones scaffolds using gold-cobalt supported on TiO2... 相似文献
3.
A Synthetic Route to Chiral Dihydrobenzothiazines through Ring Opening of Activated Aziridines with 2‐Halothiophenols/Copper‐Powder‐Mediated C−N Cyclization 下载免费PDF全文
Prof. Dr. Manas K. Ghorai Masthanvali Sayyad Yerramsetti Nanaji Sourita Jana 《化学:亚洲杂志》2015,10(7):1480-1489
A simple protocol for the synthesis of dihydrobenzothiazines through regio‐ and stereoselective SN2‐type ring opening of N‐tosylaziridines with sulfur nucleophiles followed by copper‐powder‐mediated intramolecular C?N cyclization in excellent yields (up to 95 %) with high diastereo‐ and enantioselectivity (up to >99 %) is reported. 相似文献
4.
嵌段共聚物 (BCP) 薄膜可通过不同的退火方法诱导其微相分离,从而获得大面积圆柱状、层状和球状等纳米图案。这些长程有序的纳米结构形态,已经广泛应用在纳米光刻和电子器件等多个领域中。目前,有效且快速的退火方法仍然是BCP薄膜自组装技术中的研究热点。本文首先介绍了制备BCP薄膜纳米结构图案常用的退火技术,然后综述了三种新型快速退火技术,最后分析总结了这些退火技术的优缺点。 相似文献
5.
Imran Murtaza Ibrahim Qazi Khasan S. Karimov Muhammad H. Sayyad 《Physica B: Condensed Matter》2011,406(3):533-536
We use experimental results of direct current and low signal impedance spectroscopy to investigate the conduction mechanism in organic semiconductor ZnPc. The experimental results demonstrate an increase in current and holes mobility by the introduction of a thin MoO3 film at the ITO/ZnPc interface. This significantly improves the device performance. The improvement is explained in terms of the reduction in the effective barrier for charge transfer from ZnPc to ITO. 相似文献
6.
Farid Rachidi Mutale-joan Chanda Redouane Benhima Mernissi Najib EL Abderahime Aasfar Laila Sbabou Arroussi Hicham EL 《Applied biochemistry and biotechnology》2019,188(1):225-240
Applied Biochemistry and Biotechnology - Microalgae are photosynthetic microorganisms that produce several bioactive molecules that have received considerable attention in scientific and industrial... 相似文献
7.
Belmesnaoui Aqzzouz Redouane Nouira Larbi Zraoula 《Rendiconti del Circolo Matematico di Palermo》2008,57(2):287-294
We give some sufficient and necessary conditions for that a positive Dunford-Pettis operator admits a dual operator which
is also Dunford-Pettis, and conversely.
相似文献
8.
Redouane Kara Mourad Ahmane Jean Jacques Loiseau Said Djennoune 《Nonlinear Analysis: Hybrid Systems》2009,3(4):738-748
This paper deals with constrained regulation of continuous Petri nets under the so-called infinite servers semantics. Our aim is to design feedback gains that permit us to reach both desired stationary marking vector and desired asymptotic firing rate vector. The proposed approach takes into account constraints on the control, the marking of the Petri net, and the stability of the closed-loop system. The existence of a solution is first expressed geometrically, in terms of the inclusion of two polyhedral sets. They are reformulated algebraically as linear matrix inequalities, which provides an effective way to calculate feedback gains answering the problem. Finally, an application to an assembly production system is given. 相似文献
9.
We establish some sufficient and necessary conditions which give the compactness of positive Dunford–Pettis operators on Banach lattices. To cite this article: B. Aqzzouz et al., C. R. Acad. Sci. Paris, Ser. I 340 (2005). 相似文献
10.
Fabiano V. Pereira Redouane Borsali Aloir A. Merlo Nadya P. Da Silveira 《Liquid crystals》2004,31(5):655-661
Small angle X-ray scattering was used to examine the new chiral side chain liquid crystalline polyacrylates (P4M and P11M) and their mixtures (2 wt %) in the low molar mass nematogenics 4'-n-pentyl-4-cyanobiphenyl (5CB) and 4'-octyl-4-cyanobiphenyl (8CB). Complementary data were obtained by polarizing optical microscopy. In agreement with previous studies, the mesophases of the bulk polymers show a dependence on the aliphatic spacers linking the mesogenic units to the polymer backbone. Chiral nematic and smectic A1 phases were observed for the polyacrylates with four (P4M) and eleven (P11M) methylene units as spacers, respectively. In solution with 5CB and 8CB, P4M exhibits an injected smectic phase, whereas P11M maintains the smectic arrangement already observed in the bulk, with swollen smectic layers. In all the mixtures, layer stability was found to depend on the liquid crystal used as solvent, as well as on the temperature. At temperatures corresponding to the nematic 5CB and 8CB, the coexistence of two mesophases was observed in the mixtures. Moreover, with the liquid crystal solvents in the isotropic phase, microstructures suspended in the solvent matrix containing the liquid crystalline polymer in the smectic arrangement were detected. 相似文献