The call for more sustainable processes in the chemical society has led to the development of the field of green chemistry. The Twelve Principles of Green Chemistry serve as guidelines for the design of processes. With the rise of organocatalysis and N-heterocyclic carbenes (NHCs), the NHCs have become powerful alternatives in lieu of traditional metal-catalysts; being inexpensive and non-toxic...

In a bid to return the country to food selfsufficiency, the Government of Kenya has been spearheading strategies for a new ‘Green Revolution’ in the food producing sector, as spelt out in its Strategy for Revitalizing Agriculture (SRA), a ten-year action plan launched in 2004. The SRA is entrenched in Kenya’s Vision 2030, the country’s framework for long-term investment and development (Republi...

the potential of carbon nanotubes (cnt) supported cobalt catalysts for fischer-tropsch (ft) reaction is shown. using the wet impregnation method cobalt on carbon nanotubes catalysts were prepared with cobalt loading varying from 15 to 45 wt. %. the catalysts are characterized by different methods including: bet physisorption, x-ray diffraction, hydrogen chemisorption, and temperature-programmed...

This article describes 1) a methodology for the green synthesis of a class of methylammonium and methylphosphonium ionic liquids (ILs), 2) how to tune their acid-base properties by anion exchange, 3) complete neat-phase NMR spectroscopic characterisation of these materials and 4) their application as active organocatalysts for base-promoted carbon-carbon bond-forming reactions. Methylation of t...

the interaction of the external donor (propyltrimethoxysilane - ptms) with titanium-magnesium catalysts (tmcs) containing dibutylphthalate (dbp) as internal donor, which were prepared in different ways, was studied by chemical analysis and infrared diffuse reflectance spectroscopy (drifts). the chemical composition of the catalysts after their interaction with heptane solutions of ptms, ptms/al...

The selective oxidation of alcohols is one of the most challenging reactions in green chemistry. Although a number of methods have been developed, the search for new, facile, cost-effective, and environmentally benign procedures that avoid the use of a large excess of toxic and expensive stoichiometric metal oxidants has attracted substantial interest. An attractive method is the direct oxidati...