Polymer-supported electrophilic halogenate(I) complexes 2 and 3 promote smooth addition to vinyl and allylsilanes without loss of the silyl group. In conjunction with Amberlyst A26 (OH −-form) vinyl silanes are converted into epoxysilanes.

The catalyst containing 80%Co/20%Ce/15wt%SiO2 was prepared using fusion procedure and studied for the conversion of synthesis gas to light olefins. The effect of a range of operating variables such as the pressure, temperature and H2/CO molar feed ratio on the catalytic performance of fused catalyst was investigated. It was found that the best operating conditions are H2/CO=2/1, T=350 ̊C and P=2...

P2O5-SiO2 (30% w/w) was found to be a useful catalyst for the synthesis of various 2-substituted aryl benzimidazoles under solvent-less and in solvent conditions from o-phenylenediamine and aldehydes. The products were directly recrystallized from methanol.

P2O5-SiO2 (30% w/w) was found to be a useful catalyst for the synthesis of various 2-substituted aryl benzimidazoles under solvent-less and in solvent conditions from o-phenylenediamine and aldehydes. The products were directly recrystallized from methanol.

Heck reactions were performed with 4-bromoacetophenone and n-butyl acrylate, yielding the trans-arylated acrylate ester with high selectivity. Pd–zeolite catalysts were compared with supported Pd metal catalysts. In order to obtain an active and heterogeneous catalyst, the preformed or in situ-formed catalytically active Pd0 species and the PdII intermediates must be sufficiently stabilized on ...

nano sio2/hyperbranched polyglycerol (hpg)/so3h catalyst was readily prepared for first time from inexpensive starting materials in aqueous media which catalyzed the synthesis of benzoic acid. ftir spectra, x-ray diffraction (xrd) and transmission electron micrographs (tem) was employed to characterize the properties of the synthesized nano sio2/hpg/so3h. high catalytic activity and ease of rec...

We demonstrate a one-step fabrication of patterned graphene on SiO2 substrates through a process free from catalysts, transfer, and lithography. By simply placing a shadow mask during the plasma enhanced chemical vapor deposition (PECVD) of graphene, an arbitrary shape of graphene can be obtained on SiO2 substrate. The formation of graphene underneath the shadow mask was effectively prevented b...

Metal catalysts based on Ni, Co, and Pd supported SiO2 were evaluated in the catalytic pyrolysis of waste tires using experiments coupled to gas chromatography/mass spectrometry (Py–GC/MS) thermogravimetric analysis with Fourier Transform Infrared spectrometer (TGA–FTIR) techniques. The effect temperature nature metals product distribution reaction pathways was determined. Catalytic promoted ar...