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Kingston, Canada

Greencentre Canada | Date: 2013-03-13

The present application provides salen indium catalysts of the following general structure and the corresponding dimers. The salen indium catalysts are particularly useful in catalyzing ring-opening polymerizations of cyclic ester monomers, such as lactides. Also provided herein are methods of using the salen indium complexes to catalyze polymerization of cyclic ester monomers. Of particular interest is the successful polymerization of lactides using the present salen indium catalysts to produce poly(lactic acid) having high isotacticity.

Greencentre Canada and Queen's University | Date: 2013-11-08

A solvent that reversibly converts from a hydrophobic liquid form to hydrophilic liquid form upon contact with water and a selected trigger, e.g., contact with CO

Queen's University and Greencentre Canada | Date: 2014-10-24

A solvent that reversibly converts from a hydrophobic liquid form to hydrophilic liquid form upon contact with water and a selected trigger, e.g., contact with CO

The type of biosensor they are using in the research is used in virtually every hospital in the developed world. The coatings will increase the robustness of medical instruments used in hospitals around the world and will also be used for corrosion resistance for metals. "Previously the technique used to apply these coatings required access to specialized equipment," says Dr. Crudden. "We have now designed a simple process for applying the coatings without any specialized equipment, making the application process accessible to everyone." This new technique builds on an earlier discovery in 2014 when the research trio developed a technique to prepare single molecule-thick coatings of organic molecules on the surface of metals. Despite being 100,000 times thinner than a human hair, this layer is able to withstand a battery of harsh chemicals, oxidants, acids and bases - a discovery that has positive implications for the microelectronics industry (an industry devoted to the design and development of tiny electronic devices). The recent discovery allows the coating to be applied without the use of specialized equipment therefore making it more accessible. Working with GreenCentre Canada, Drs. Crudden, Horton and McLean hope to make this a reality so that researchers world-wide can access this new technology. The research was published in Nature Communications. Explore further: Researchers patent process that binds organic compounds to metal surfaces More information: Cathleen M. Crudden et al. Simple direct formation of self-assembled N-heterocyclic carbene monolayers on gold and their application in biosensing, Nature Communications (2016). DOI: 10.1038/ncomms12654

Jessop P.G.,Queens University | Kozycz L.,Queens University | Rahami Z.G.,Queens University | Schoenmakers D.,Queens University | And 3 more authors.
Green Chemistry | Year: 2011

Several tertiary amines serve as switchable-hydrophilicity solvents, meaning that they are hydrophobic solvents having very low miscibility with water when under air but hydrophilic solvents having complete miscibility with water when under an atmosphere of CO 2. Unlike the only previously reported switchable-hydrophilicity solvent, these amines are easily prepared and, in some cases, commercially available. The effect of temperature, gas flow rates, choice of amine and additives on the switching process is described. These solvents can be applied to the recycling of polystyrene foam. © The Royal Society of Chemistry.

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