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disulfide
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Sodium hypochlorite/montmorillonite K10: An effective oxidant for the oxidation of thiols to disulfides
, Article Letters in Organic Chemistry ; Volume 2, Issue 5 , 2005 , Pages 485-486 ; 15701786 (ISSN) ; Rahimi, A ; Karimi Jaberi, Z ; Sharif University of Technology
2005
Abstract
Sodium hypochlorite adsorbed on montmorillonite K10 is a useful oxidant for the oxidation of thiols to disulfides under the room temperature. © 2005 Bentham Science Publishers Ltd
A simple, economical, and catalyst-free oxidation of thiols to disulfides
, Article Journal of Sulfur Chemistry ; Volume 30, Issue 6 , 2009 , Pages 578-580 ; 17415993 (ISSN) ; Hashemi, M. M ; Sharif University of Technology
Abstract
A simple, rapid, and highly efficient method for the preparation of symmetrical aliphatic, aromatic, and heteroaromatic disulfides is reported. Addition of NBS to an alkyl- or arylthiol under catalyst-free conditions in dichloromethane solution produces the corresponding disulfides in nearly quantitative yields
Synthesis and cation-exchange behavior of expanded MoS2 nanosheets for anticorrosion applications
, Article 2017 INN International Conference/Workshop on Nanotechnology and Nanomedicine, NTNM 2017, 2 May 2017 through 3 May 2017 ; Volume 5, Issue 7 , 2018 , Pages 15573-15579 ; 22147853 (ISSN) ; Amini, M ; Ghaderi, S ; Ramazani, A ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
Molybdenum disulfide (MoS2), a 2D layered structure, because of its unique properties has widely attracted many researchers. In this study, by employing physical and chemical methods, not only layers of MoS2 have been intercalated, but also their surface properties enhanced. Low-dimensional and potential properties of intercalated MoS2 nanosheets are the aim of many researches. Here, we report a novel four step method to intercalate the layers of MoS2 nanosheets successfully using acid treatment, sonication, oxidization and thermal shocking. The other goal in this study is to evaluate the cation exchange ability and anticorrosion performance of the Ce3+ doped MoS2 nanosheets. The...
N-Chlorosuccinimide: A simple and efficient reagent for the preparation of symmetrical disulfides
, Article Journal of Sulfur Chemistry ; Volume 27, Issue 2 , 2006 , Pages 165-167 ; 17415993 (ISSN) ; Ghafuri, H ; Karimi Jaberi, Z ; Sharif University of Technology
2006
Abstract
The efficient oxidative coupling of thiols to disulfides with N-chlorosuccinimide (NCS) at room temperature is described. Simple workup, economical method, high yields of products are some advantages of this method. © 2006 Taylor & Francis
Copper chloride/kieselguhr: An efficient catalyst for oxidation of thiols to disulfides by molecular oxygen or air
, Article Journal of Chemical Research ; Issue 5 , 2004 , Pages 364-365 ; 03082342 (ISSN) ; Karimi Jaberi, Z ; Ghazanfari, D ; Sharif University of Technology
Scientific Reviews Ltd
2004
Abstract
Kieselguhr supported copper chloride catalyses the oxidation of thiols to disulfides in the presence of oxygen or air
Oxidation of thiols to bisulfides by oxygen in presence of cobalt(ii) and manganese(ii) salts of 4-aminobenzoic acid supported on silica gel
, Article Monatshefte fur Chemie ; Volume 135, Issue 1 , 2004 , Pages 41-43 ; 00269247 (ISSN) ; Karimi Jaberi, Z ; Sharif University of Technology
2004
Abstract
A mixture of cobalt(II) and manganese(II) salts of 4-aminobenzoic acid supported on silica gel catalyses the oxidation of thiols to disulfides in the presence of oxygen or air
Synthesis of poly-substituted thiophenes in the realm of sulfonylketenimines chemistry
, Article Journal of Sulfur Chemistry ; Volume 41, Issue 2 , 2020 , Pages 146-153 ; Sedaghat, A ; Nematpour, M ; Jahani, M ; Tabatabai, S. A ; Sharif University of Technology
Taylor and Francis Ltd
2020
Abstract
An efficient synthesis of highly substituted thiophenes was developed by means of sulfonylketenimines in a multi-step reaction including heterocumulene system containing sulfur and nitro-alkanes with acidic α-hydrogen. The speed and ease of conducting this four-component reaction under mild conditions and using available materials makes it an ideal method to synthesize high purity substituted thiophenes with sulfonamide moiety. All structures synthesized are confirmed by the instrumental analysis (EI-MS, IR and 1H /13C-NMR). © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group
An efficient one-pot Michael addition of dithiocarbamate anion to α,β-unsaturated olefins mediated by lithium perchlorate
, Article Journal of Sulfur Chemistry ; Volume 26, Issue 2 , 2005 , Pages 149-153 ; 17415993 (ISSN) ; Saidi, M. R ; Sharif University of Technology
Taylor and Francis Ltd
2005
Abstract
The reaction of substituted dithiocarbamates with electrophilic alkenes in the presence of LiClO4 was investigated in an attempt to prepare numerous ethyl dithiocarbamates bearing β-electron-withdrawing-group substituents. The reaction conditions are mild, neutral, with extremely simple work-up procedures, and offer high yield. © 2005 Taylor & Francis Group Ltd
Mn(III) complex supported on Fe3O4 nanoparticles: Magnetically separable nanocatalyst for selective oxidation of thiols to disulfides
, Article Journal of Coordination Chemistry ; Volume 66, Issue 17 , 2013 , Pages 3025-3036 ; 00958972 (ISSN) ; Haghdoost, M. M ; Moghaddam, F. M ; Foroushani, B. K ; Saryazdi, S ; Payab, E ; Sharif University of Technology
2013
Abstract
A manganese(III) complex, [Mn(phox)2(CH3OH) 2]ClO4 (phox = 2-(2′-hydroxyphenyl)oxazoline), was immobilized on silica-coated magnetic Fe3O4 nanoparticles through the amino propyl linkage using a grafting process in dichloromethane. The resulting Fe3O4@SiO2-NH2@Mn(III) nanoparticles are used as efficient and recyclable catalysts for selective oxidation of thiols to disulfides using urea-hydrogen peroxide as the oxidant. The nanocatalyst was recycled several times. Leaching and recycling experiments revealed that the nanocatalyst can be recovered, recycled, and reused more than five times, without the loss of catalytic activity and magnetic properties. The recycling of the nanocatalyst in six...
Versatile and large-scale synthesis of functional dithiocarbamates in water
, Article Synthetic Communications ; Volume 41, Issue 1 , Dec , 2011 , Pages 94-99 ; 00397911 (ISSN) ; Aryanasab, F ; Tourkian, L ; Saidi, M. R ; Sharif University of Technology
2011
Abstract
Structural diversity is possible in direct access to functional dithiocarbamates based on a highly efficient and simple one-pot reaction of CS2, amines, and alkyl halides in nearly quantitative yields in water
A novel one-pot synthesis of 2-alkylthio-1,3,4-oxadiazoles in water
, Article Journal of the Iranian Chemical Society ; Volume 8, Issue 2 , June , 2011 , Pages 525-530 ; 1735207X (ISSN) ; Maleki, H ; Saidi, M. R ; Sharif University of Technology
2011
Abstract
A facile and one-pot protocol for the synthesis of 2-alkylthio-1,3,4- oxadiazoles is reported. This green method relies on the reaction of acid hydrazides with CS2 and an alkyl halide. The reaction is carried out under mild and environmentally friendly procedure in water with high to excellent yields. Thirteen different valuable alkylthio-1,3,4-oxadiazoles are synthesized from cheap and easily available CS2 with this method. This is the first report for the synthesis of 1,3,4-oxadiazoles in water
Synthesis and characterization of metal dithiocarbamate derivatives of 3-((pyridin-2-yl)methylamino)propanenitrile: Crystal structure of [3-((pyridin-2-yl)methylamino)propanenitrile dithiocarbamato] nickel(II)
, Article Polyhedron ; Volume 102 , 2015 , Pages 643-648 ; 02775387 (ISSN) ; Torabi, S ; Amani, V ; Notash, B ; Saidi, M. R ; Sharif University of Technology
Elsevier Ltd
2015
Abstract
Four metal dithiocarbamate complexes (Zn, Ni, Hg and Sn) based on an amine containing pyridyl and nitrile groups, 3-((pyridin-2-yl)methylamino)propanenitrile, were prepared and characterized by their elemental analysis, spectroscopic data (such as IR, 1H and 13C NMR), TGA analysis and X-ray crystallography of the Ni(II) complex. The presence of a band in the 1000 cm-1 region in the IR spectra, without any splitting, confirms the symmetrical bidentate bonding mode of the dithiocarbamate ligand. Also, the short thioureide C=N distance in the X-ray analysis of the Ni complex confirms the delocalization of π electrons over the S2CN moiety and strong double bond character between the carbon and...
Dithiocarbamate as an efficient intermediate for the synthesis of 2-(alkylthio)thiazol-4(5H)-ones
, Article Journal of Sulfur Chemistry ; Volume 37, Issue 5 , 2016 , Pages 529-536 ; 17415993 (ISSN) ; Alaei, M. A ; Soleymani Movahed, F ; Jomeh, N ; Saidi, M. R ; Sharif University of Technology
Taylor and Francis Ltd
Abstract
An effective approach for the synthesis of 2-(alkylthio)thiazol-4(5H)-ones from alkyl dithiocarbamates and chloroacetyl chloride in the presence of NaHCO3 has been developed. Good to excellent yields of products, simple reaction conditions and general applicability are the most important advantages of this protocol
The effect of structural defects on the electron transport of MoS 2 nanoribbons based on density functional theory
, Article Journal of Theoretical and Applied Physics ; Volume 13, Issue 1 , 2019 , Pages 55-62 ; 22517227 (ISSN) ; Fathipour, M ; Faez, R ; Darvish, G ; Sharif University of Technology
SpringerOpen
2019
Abstract
Using non-equilibrium Green’s function method and density functional theory, we study the effect of line structural defects on the electron transport of zigzag molybdenum disulfide (MoS 2 ) nanoribbons. Here, the various types of non-stoichiometric line defects greatly affect the electron conductance of MoS 2 nanoribbons. Although such defects would be lead to the electron scattering, they can increase the transmission of charge carriers by creating new channels. In addition, the presence of S bridge defect in the zigzag MoS 2 nanoribbon leads to more the transmission of charge carriers in comparison with the Mo–Mo bond defect. Also, we find that the different atomic orbitals and their...
A simple and novel eco-friendly process for the one-pot synthesis of dithiocarbamates from amines, carbon disulfide, and epoxides
, Article Synlett ; Issue 8 , 2007 , Pages 1239-1242 ; 09365214 (ISSN) ; Pourhasan, B ; Aryanasab, F ; Saidi, M. R ; Sharif University of Technology
2007
Abstract
An environmentally benign, highly efficient, and simple protocol for the synthesis of various structurally divergent dithiocarbamate derivatives in one-pot reaction of amines, carbon disulfide, and epoxides, without using any solvent and catalyst at room temperature, is presented. This new procedure has the advantages of higher yield, lower cost, reduced environmental impact, and simple work-up procedure. © Georg Thieme Verlag Stuttgart
A joint experimental and computational study on the kinetic and mechanism of diallyl disulfide pyrolysis in the gas phase
, Article Chemical Physics ; Volume 301, Issue 1 , 2004 , Pages 45-51 ; 03010104 (ISSN) ; Izadyar, M ; Sharif University of Technology
2004
Abstract
A combined theoretical and experimental kinetic and mechanism of diallyl disulfide pyrolysis reaction in the gas phase was studied in a static system over the temperature range of 586.7-621.2 K and a total pressure of 72 Torr in the presence of cyclohexene as radicals inhibitor. The experimental results show that the reaction is homogeneous, unimolecular and proceeds through a radical mechanism. Theoretical calculations at the B3LYP level using the 6-31G*, 6-31++G* and 6-311++G* basis sets confirm the radical mechanism for the diallyl disulfide pyrolysis. The calculated kinetic and activation parameters especially at the B3LYP/6-31G* level are in good agreement with the experimental data. ©...
Transport Properties in Heterostructures of 2D Layers of Graphene with WS2 and hBN Quantum Dots
, M.Sc. Thesis Sharif University of Technology ; Simchi, Abdolreza (Supervisor)
Abstract
Graphene based photodetectors which are modified with quantum dots, are the new generation of detectors. In these supplies an integration of graphene’s unique characteristics like high conductivity and mobility and the high light absorption of quantum dots, are used.In this research graphene by chemical vapor deposition in centimetric large scales, tungsten disulfide quantum dots, boron nitride and graphene quantum dots and 2D tungsten disulfide have been synthesized. In the next step each of them were characterized to modify the quality of used layers in heterostructure.Based on the characteristic tests, quantum dots aspect ratios were 1 to 5 nanometers. Also tungsten disulfide was obtained...
Oxidative Deprotection of Trimethylsilyl Ethers and Coupling of Thiols to Disulfides by Cr (VI) and Fe (III) Heterogeneous Nanocatalysts
, M.Sc. Thesis Sharif University of Technology ; Saeedi, Mohammad Reza (Supervisor) ; Rajabi, Fateme (Supervisor)
Abstract
Considering the advantages of heterogeneous catalysts for the easy work up procedure, being eco-friendly, and the reusability, herein, two projects are carried out by metal-supported SBA-15 catalysts. The first one is the oxidative deprotection of trimethylsilyl ethers catalyzed Cr (VI) in the presence of TBHP as oxidant. In this project, trimethylsylil ethers are oxidized in good to high yields. The second project is the oxidative coupling of thiols to disulfides catalyzed by Fe (III) in the presence of hydrogenperoxide. This catalyst/oxidant system convets different aromatic thiols to corresponding disulfides efficiently
A simple and novel eco-friendly process for the synthesis of cyclic dithiocarbonates from epoxides and carbon disulfide in water
, Article Journal of Heterocyclic Chemistry ; Volume 46, Issue 2 , 2009 , Pages 347-350 ; 0022152X (ISSN) ; Ebrahimi, F ; Azizi, N ; Saidi, M. R ; Sharif University of Technology
2009
Abstract
The reaction of oxiranes with carbon disulfide for preparation of cyclic dithiocarbonates was carried out in water under catalytic amount of an organic base such as dimethylaminopyridine or triethylamine. The reaction conditions are simple and give high yields of desired products.© 2009 HeteroCorporation
A density functional study of strong local magnetism creation on MoS 2 nanoribbon by sulfur vacancy
, Article Nanoscale ; Volume 2, Issue 8 , 2010 , Pages 1429-1435 ; 20403364 (ISSN) ; Manteghian, M ; Sharif University of Technology
2010
Abstract
In this study a low-width MoS2 ribbon has been used for probing the electronic structure and local magnetic moment near vacancies. A theoretical study with the full-potential Density Functional Theory (DFT) approach (Wien2K code) have shown that when the dimension of MoS2 is reduced from 2-D to 1-D the nonmagnetic semi-conductor MoS2 becomes a magnetic conductor. Our study has shown that a vacancy on the S-edge with 50% coverage intensifies the magnetization of the edge of the MoS2 nanoribbon but such a vacancy on S-edge with 100% coverage causes this magnetic property to disappear. It is concluded that in both of them, there are positive or negative strong gradients of local magnetic moment...