Since its inception, Strem Chemicals has focused on offering unique organometallic compounds for both academic and industrial research purposes. Close relationships with leading researchers in the field have enabled Strem to stay abreast of the latest scientific advances in and regularly add novel chemicals to our product portfolio. A series of nanomaterials, including metal nanoclusters, metal nanocolloids (organosols and hydrosols), metal nanopowders, metal nanoparticles
Catalysts play a significant role in the production of chemicals today. Nanomaterials have the potential for improving the efficiency, selectivity, and yield of catalytic processes. The higher surface to volume ratio means that much more of the catalyst is actively participating in the reaction. The potential for cost savings is tremendous from a material, equipment, labour, and time standpoint. Higher selectivity mean less waste and fewer impurities, which could lead to safer drugs and reduced environmental impact.
Nanoscale catalysts have been investigated in a number of reactions. Nanometal colloids have been of particular interest. In the precursor concept, pre-prepared nanometal colloids can be tailored for special applications independently of the support by modifying them with lipophilic or hydrophilic protective coatings. Adsorption onto the support is achieved by dipping the material into a solution of the particles. Surfactant stabilised nanometal colloid catalysts have been found to surpass conventional catalysts for hydrogenation and oxidation reactions.
Metal nanoclusters have also been found to be good catalysts. Nanoparticles supported on polymers have been found to catalyse hydrogenations and carbon-carbon coupling reactions. Metal clusters retain their activity for extended periods of time and over a range of substrates.
Gold nanoclusters have also exhibited catalytic activity for the low temperature oxidation of carbon monoxide, even though bulk gold is inactive.
A listing of specific metal nanoclusters, metal nanocolloids (organosols and hydrosols), metal nanopowders, metal nanoparticles, and magnetic fluids offered by Strem is available upon request or via our website
Since 2004, Strem has manufactured a number of nanomaterials including clusters, colloids, particles, powders and magnetic fluids of a range of metals. These are produced by a variety of wet chemical means under patented processes. High purity metal precursors as well as surfactants and ligands for nanomaterial synthesis are also available. In 2008, Strem expanded its US-based nanomaterials initiative and established a Nanochemistry Laboratory in Europe at the Institut de Science et d’Ingenierie Supramoleculaires (ISIS) of the University of Strasbourg, France. The European lab works closely with Strem’s US facility and Prof. Dr. Helmut Bönnemann, Strem’s nanoconsultant. The goal of the European facility is to serve R&D groups worldwide with custommade nanostructured materials. Strem also offers many proprietary and non-proprietary catalysts and ligands for organic synthesis through its Catalogue of Chemicals for Research. Custom synthesis services are also provided, on a contract basis, from research to commercial scale quantities. Due to Strem’s focus on quality, most of its products are of high purity, typically 99%, with some at 99.9999% metals purity. Strem also manufactures pharmaceuticals and intermediates under cGMP in FDA inspected kilo-lab suites. Complete documentation is available, including validation and stability studies. Active Drug Master Files (DMF’s), European DMF’s and Certificates of Suitability are also maintained. More information is available at www.strem.com.