نتایج جستجو برای: sba 15 functionalized ionic liquid

تعداد نتایج: 757732  

Journal: :Chemical communications 2003
Yong Cao Jun-Cheng Hu Ping Yang Wei-Lin Dai Kang-Nian Fan

CuCl has been successfully immobilized on a novel diamide modified SBA-15, and proven to be an efficient heterogenized catalyst for the oxidative carbonylation of methanol to dimethylcarbonate.

Journal: :The Analyst 2011
Sen Liu Jingqi Tian Lei Wang Yonglan Luo Guohui Chang Xuping Sun

In this communication, we demonstrate our recent finding that iron-substituted SBA-15 (Fe-SBA-15) microparticles possess intrinsic peroxidase-like activity and can catalyze the oxidation of peroxidase substrate 3,3',5,5'-tetramethylbenzidine (TMB) by H(2)O(2) to develop a blue color in aqueous solution, leading to a simple approach towards colorimetric detection of H(2)O(2) with a linear detect...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2010
ghodsi mohammadi ziarani ali reza badiei yeganeh khaniania mahbobeh haddadpour

sulfonic acid functionalized sba-15 (sba-pr-so3h) as a new nanoporous acid catalyst was used in the one-pot synthesis of polyhydroquinolines derivatives via the hantzsch four component condensation reaction of aldehydes, b-ketoesters, dimedone and ammonium acetate under solvent free conditions with short reaction time in excellent yields. sba-pr-so3h was proved to be an efficient heterogeneous ...

2007
Hancheng Zhou Feng Shi Xiong Tian Qinghua Zhang Youquan Deng

Selective synthesis of carbamates from amines and dimethyl carbonate were studied in the presence of various ionic liquids as catalysts. The SO3H-functionalized ionic liquid was found to be the most active catalyst among the applied ionic liquids, and nearly 100% conversion and 95% electivity were achieved when using 1,6-hexanediamine as reactant. The acid functional ionic liquid catalyst syste...

Journal: :Chemical communications 2013
Xiao-Yan Chen George S Goff Mauricio Quiroz-Guzman Daniel P Fagnant Joan F Brennecke Brian L Scott Wolfgang Runde

The carboxyl-functionalized phosphonium ionic liquid (IL), [HCTMP][Tf(2)N], enabled the directed nucleation of monomeric or dimeric uranyl(vi) compounds. This new IL is the first carboxyl-functionalized IL which is liquid at room temperature and exhibits a wider electrochemical window and lower melting point than its ammonium analogue.

2006
Xueguang Wang Soofin Cheng

Flavanone was synthesized through the Claisen–Schmidt condensation between benzaldehyde and acetophenone and subsequent intramolecular Michael addition over aminopropyl-functionalized SBA-15 materials. The catalysts with well-ordered hexagonally arranged mesopores were synthesized by one-pot co-condensation of tetraethoxysilane and aminopropyltriethoxysilane using amphiphilic block copolymer as...

2011
Anthony J. Crisci Mark H. Tucker Ming-Yung Lee Se Gyu Jang James A. Dumesic Susannah L. Scott

Acid-Functionalized SBA-15-Type Silica Catalysts for Carbohydrate Dehydration Anthony J. Crisci, Mark H. Tucker, Ming-Yung Lee, Se Gyu Jang, James A. Dumesic,* and Susannah L. Scott* Department of Chemistry & Biochemistry, Department of Chemical Engineering, and Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States Department of Chemical Enginee...

Journal: :Chemical communications 2015
Zhihui Li Qiusheng Yang Xudong Qi Yuanyuan Xu Dongsheng Zhang Yanji Wang Xinqiang Zhao

A SO3H-functionalized ionic liquid was used as an alternative to conventional inorganic acids in hydroxylamine stabilization, leading to the formation of a novel hydroxylamine ionic liquid salt that exhibits improved thermal stability and reactivity in the one-step, solvent-free synthesis of caprolactam in comparison with hydroxylamine hydrochloride and hydroxylamine sulfate.

Journal: :Dalton transactions 2013
Subodh Kumar Suman L Jain

A new nanostarch functionalized ionic liquid containing imidazolium cation and cobalt chelate anion was synthesized and tested for the one pot synthesis of carbamates by the reaction of amines and dimethyl carbonate (DMC), affording excellent yield of the products under solvent free mild reaction conditions. The synthesized ionic liquid was easily recovered and reused several times without any ...

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