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催化学报 2008年第9期29卷 901-906页

作者： Khodabakhsh NIKNAM mohammad ali zolfigol Gholamabbas CHEHARDOLI Mina DEHGHANIAN Department of Chemistry Faculty of SciencesPersian Gulf UniversityBushehr 75169Iran Faculty of Chemistry Bu-Ali Sina UniversityP.O.Box 4135Hamedan ***Iran School of Pharmacy Hamedan University of Medical Sciences65178 HamedanIran

Many primary,secondary,tertiary alcohols,and phenolic hydroxyl groups were effectively converted to their corresponding trimethylsilyl ethers using hexamethyldisilazane in the presence of catalytic amounts of tribromoisocyanuric acid and DABCO-bromine under mild conditions at room temperature with short reaction times in good to excellent *** chemoselective silylation of hydroxyl groups in the presence of other functional groups were also observed.

关键词： DABCO-溴催化剂催化作用化学分析

Molecular design and applications of a nanostructure green Tripodal surface active ionic liquid in enhanced oil recovery: Interfacial tension reduction, wettability alteration, and emulsification

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Petroleum Science 2023年第6期20卷 3530-3539页

作者： Mona Kharazi Javad Saien Morteza Torabi mohammad ali zolfigol Faculty of Chemistry and Petroleum Science Bu–Ali Sina UniversityHamedan***Iran

Surface active ionic liquids (SAILs) are considered as prominent materials in enhanced oil recovery thanks to their high interfacial activity. This study reports the preparation and applications of a nanostructure Tripodal imidazolium SAIL as an environmentally-friendly substitute to the conventional surfactants. The product has a star-like molecular structure centered by a triazine spacer, namely [(C_(4)im)_(3)TA][Cl_(3)], prepared by a one-step synthesis method and characterized with FT-IR, NMR, XRD, and SEM analysis methods. The interfacial tension of the system was decreased to about 78% at critical micelle concentration of less than 0.08 mol·dm^(−3). Increasing temperature, from 298.2 to 323.2 K, improved this capability. The solid surface wettability was changed from oil-wet to water-wet and 80% and 77% stable emulsions of crude oil–aqueous solutions were created after one day and one week, respectively. Compared to the Gemini kind homologous SAILs, the superior effects of the Tripodal SAIL were revealed and attributed to the strong hydrophobic branches in the molecule. The Frumkin adsorption isotherm precisely reproduced the generated IFT data, and accordingly, the adsorption and thermodynamic parameters were determined.

关键词： Tripodal ionic liquids Green materials Enhanced oil recovery Interfacial tension Wettability Emulsification

Melamine trisulfonic acid:A new,efficient and recyclable catalyst for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones in the absence of solvent

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Chinese Chemical Letters 2011年第3期22卷 318-321页

作者： Farhad Shirini mohammad ali zolfigol Jalal Albadi Department of Chemistry College of ScienceUniversity of GuilanRasht 41335Islamic Republic of Iran College of Chemistry Bu-Ali Sina UniversityHamadanIslamic Republic of Iran

Melamine trisulfonic acid（MTSA） can be used as an efficient and recyclable catalyst for the promotion of the synthesis of 3,4- dihydropyrimidin-2（1H）-ones/thiones（DHPMs） in the absence of *** reactions were perf... 详细信息

关键词： Melamine trisulfonic acid 3 4-Dihydropyrimidin-2(1H)-ones/thiones Biginelli reaction Aldehydes Solvent-free reactions

Surfactant-assisted synthesis of bis(indolyl)methanes in water

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Chinese Chemical Letters 2011年第11期22卷 1305-1308页

作者： Eskandar Kolvari mohammad ali zolfigol Hoda Banary Department of Chemistry Faculty of Science Semnan UniversitySemnanIran Faculty of Chemistry Bu-ali Sina University HamedanIran

An environmentally friendly synthesis method for bis（indolyl）methanes has been developed in the presence of sodium lauryl ether sulfate（SLES）,electrophilic substitution reactions of indoles with aldehydes were acc... 详细信息

关键词： Sodium lauryl ether sulfate Bis(indolyl) methanes Indoles Aldehydes

Regioselective tetrahydropyranylation of alcohols catalyzed by Fe(HSO_4)_3

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Chinese Chemical Letters 2007年第7期18卷 803-806页

作者： Farhad Shirini mohammad ali zolfigol Abdol-Reza Abri Department of Chemistry College of Science The University of Guilan Rasht 41335 Iran Department of Chemistry College of Science Bu-Ali Sina University Hamadan 65174 Iran

Alcohols are selectively and efficiently protected as their tetrahydropranyl ethers in the presence of a catalytic amount of Fe（HSO4）3 in good to high yields. All reactions are performed under mild and completely he... 详细信息

关键词： Alcohols Tetrahydropyranylation Tetrahydropyranyl ethers Fe(HSO4)3 Heterogeneous reaction conditions

Silica triflate as an efficient reagent for the solvent-free synthesis of coumarins

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Chinese Chemical Letters 2007年第8期18卷 909-911页

作者： Farhad Shirini Katayoun Marjani Hossein Taherpour Nahzomi mohammad ali zolfigol Department of Chemistry College of ScienceGuilan UniversityRasht 41335Iran Faculty of Chemistry Teacher Training UniversityTehran 15614Iran Department of Chemistry College of ScienceBu-Ali Sina UniversityHamadan 65174Iran

Silica triflate, as a new silica-based reagent, can be used for the efficient synthesis of 4-substituted coumarins via a Pechmann reaction under solvent-free reaction conditions. All reactions were performed at 80 ℃ ... 详细信息

关键词： Silica triflate Coumarins Pechmann reaction Solvent-free reaction conditions Phenols

Application of Modified Silica Coated Magnetite Nanoparticles for Removal of Iodine from Water Samples

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Nano-Micro Letters 2012年第1期4卷 57-63页

作者： Tayyebeh Madrakian Abbas Afkhami mohammad ali zolfigol Mazaher Ahmadi Nadia Koukabi Faculty of Chemistry Bu-Ali Sina University

The adsorption of iodine onto silica coated magnetite nanoparticles(im-SCMNPs) that modified with imidazole was investigated for removal of high concentrations of iodine from wastewater. Modified silica magnetite nanoparticles showed high efficiency in removing iodine from wastewater samples. The optimum pH for iodine removal was 7.0-8.0. The adsorption capacity was evaluated using both the Langmuir and Freundlich adsorption isotherm models. The size of the produced magnetite nanoparticles was determined by X-ray diffraction analysis and scanning electron microscopy. Synthesized magnetite nanoparticles showed the high adsorption capacity and would be a good method to increase adsorption efficiency for the removal of iodine in a wastewater treatment process. The Langmuir adsorption capacity(qmax) was found to be 140.84 mg/g of the adsorbent.

关键词： Modified silica magnetite nanoparticles Iodine Imidazole Water samples

An efficient and versatile synthesis of aromatic nitriles from aldehydes

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Chinese Chemical Letters 2012年第12期23卷 1323-1326页

作者： Maryam Hajjami Arash Ghorbani-Choghamarani mohammad ali zolfigol Fatemeh Gholamian Department of Chemistry Faculty of ScienceIlam University Faculty of Chemistry Bu-Ali Sina University

A simple and direct method has been developed for synthesis of nitriles based on one-pot reaction of aromatic aldehydes with three different kind of reagents： CeCl3.7H20/KI/H2O2, CeCl3.7H2O/KI/UHP and （NH4）2Ce（NO3... 详细信息

关键词： Nitrile Cerium chloride Ammonium cerium nitrate Urea hydrogen peroxide Hydrogen peroxide

Melamine-(H_2SO_4)_3 and PVP-(H_2SO_4)_n as solid acids:Synthesis and application in the first mono-and di-nitration of bisphenol A and other phenols

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Chinese Chemical Letters 2011年第7期22卷 827-830页

作者： Gholamabbas Chehardoli mohammad ali zolfigol Seyedeh Bahareh Azimi Ebadollah alizadeh School of Pharmacy Hamedan University of Medical SciencesHamedan 65178Iran Faculty of Chemistry Bu-Ali Sina UniversityHamedanIran Islamic Azad University Shahre Rey BranchShahre ReyIran Payame Noor University HamedanIran

Melamine and poly vinylpyrrolidone （PVP） reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-（H2SO4）3 and PVP-（H2SO4）n. These solid acids were used for the first nitration of bisphenol A as well as other phenols in the presence of NHaNO3. Mono- and di-nitro bisphenol A have been characterized with IR and ^1H NMR techniques.

关键词： Bisphenol A Melamine-(H2S04)3 Nitration PVP-(H2SO4)n Phenols

{[K.18-Crown-6]Br3}n:保护胺和醇的三溴化催化剂(英文)

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催化学报 2013年第9期34卷 1730-1733页

作者： Gholamabbas Chehardoli mohammad ali zolfigol Fateme Derakhshanpanah Department of Medicinal Chemistry School of PharmacyHamedan University of Medical Sciences Faculty of Chemistry Bu-Ali Sina University

{[K.18-Crown-6]Br3}n , a unique tribromide-type catalyst, was utilized for the N-boc protection of amines and trimethylsilylation (TMS) and tetrahydropyranylation (THP) of alcohols. The method is general for the preparation of N-boc derivatives of aliphatic (acyclic and cyclic) and aromatic, and primary and secondary amines and also various TMS-ethers and THP-ethers. The simple separation of the catalyst from the product is one of the many advantages of this method.

关键词： {[K.18-Crown-6]Br3}n Trimethylsilylation Tetrahydropyranylation Alcohol Organic tribromide N-boc protection of amine