نتایج جستجو برای: silica supported catalysts

تعداد نتایج: 257434  

A series of Fe3O4 supported on mesoporous FDU-12 silica systems were prepared by the hydrothermal conditions. The surface properties of the functionalized catalyst were analyzed by a series of characterization techniques like FTIR, XRD, N2 adsorption–desorption and TEM. XRD and adsorption–desorption analysis shows that the mesostructure of FDU silica remains intact after Fe3O4 modifications, wh...

Hassan Tajik, Khodabakhsh Niknam Somayeh Karimian

In this research, different alcohols and phenols are subjected to the reaction with HMDS in the presence of ionic liquid and silica-supported catalysts. Silylation was accomplished under mild reaction conditions at room temperature in short reaction times and good to excellent yields.

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1997
mohammad m. hashemi nasrin manuchehri

a mixture of manganese, cobalt and lead para-amino benzoates supported on silica gel is used to catalyze oxidation of xylenes to toluic acids in presence of oxygen or air. reactions are clean and catalysts can be recovered easily and reused.

Hassan Tajik, Khodabakhsh Niknam Somayeh Karimian

In this research, different alcohols and phenols are subjected to the reaction with HMDS in the presence of ionic liquid and silica-supported catalysts. Silylation was accomplished under mild reaction conditions at room temperature in short reaction times and good to excellent yields.

2013
Hongjing Wu Giuseppe Pantaleo Anna M. Venezia Leonarda F. Liotta

Gold nanoparticles, particularly with the particle size of 2–5 nm, have attracted increasing research attention during the past decades due to their surprisingly high activity in CO and volatile organic compounds (VOCs) oxidation at low temperatures. In particular, CO oxidation below room temperature has been extensively studied on gold nanoparticles supported on several oxides (TiO2, Fe2O3, Ce...

Journal: :iranian journal of catalysis 2016
rajesh k. singh shikha sharma akshdeep sandhar manpreet saini sahil kumar

1,5-benzodiazepines are regarded as one of the most important classes of heterocyclic compounds as privileged structures and have vast range of applications in the field of medicine and chemistry. they are therefore attractive synthetic targets for organic and medicinal chemist. the current review article mainly covers the multicomponent green chemistry approaches for the synthesis of 1,5-benzo...

Journal: :polyolefins journal 0
natalya n. chumachenko boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation vladimir a. zakharov boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation sergey a. sergeev boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation svetlana v. cherepanova boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation

supported catalysts synthesized via the interaction of mg(oet)2 with ticl4 in the presence or absence of an internal stereoregulating donor (di-n-butyl phthalate), with different solvents (chlorobenzene, n-undecane, n-heptane) at different titanation temperatures have been studied by a set of physicochemical methods. data on the chemical composition, x-ray structure and pore structure of these ...

2005
Duncan J. Macquarrie Stefan Toma

Research into supported palladium complexes is described. The complexes are immobilised on porous silica supports using both grafting and templated sol-gel techniques. The resultant complexes are efficient catalysts for various C-C bond forming reactions, including Heck, Suzuki and allylic substitution. The catalysts are stable and can be easily recovered and reused, making them suitable for cl...

1,5-benzodiazepines are regarded as one of the most important classes of heterocyclic compounds as privileged structures and have vast range of applications in the field of medicine and chemistry. They are therefore attractive synthetic targets for organic and medicinal chemist. The current review article mainly covers the multicomponent green chemistry approaches for the synthesis of 1,5-benzo...

Journal: :Molecules 2016
Anna Maria Pia Salvo Francesco Giacalone Michelangelo Gruttadauria

In this review, the most recent advances (2014-2016) on the synthesis of new polymer-supported catalysts are reported, focusing the attention on the synthetic strategies developed for their preparation. The polymer-supported catalysts examined will be organic-based polymers and organic-inorganic hybrids and will include, among others, polystyrenes, poly-ionic liquids, chiral ionic polymers, den...

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