Curious about what goes on in the Greener Solutions course at the Berkeley Center for Green Chemistry? Learn more about it by watching this short video!
Chemical Footprinting: Identifying Hidden Liabilities in Manufacturing Consumer Products
In an unassuming low-rise in the Boston suburbs, Mark Rossi tinkers with a colorful dashboard on his laptop screen while his border collie putters around his feet. Rossi is the founder of BizNGO and Clean Production Action, two nonprofit collaborations of business and environmental groups to promote safer chemicals. He’s also the creator of tools that he hopes will solve a vexing problem—how to get a handle on companies’ overall toxic chemicals usage.
Consider the screen of Rossi’s laptop. Chances are the company that manufactured the product has crunched the numbers on the total amount of carbon, water, and land associated with getting it into the office—from the manufacturing of the electronic components to the packaging and transportation to retail outlets. But the total amount of toxic chemicals that contributed to the screen’s design and production might be a more difficult question to answer….
Read the entire story, by Lindsey Konkel, at http://ehp.niehs.nih.gov/123-a130/
“Selective Chromium(VI) Ligands Identified Using Combinatorial Peptoid Libraries.” Knight, A. S., Zhou, E. Y., Pelton, J. G., Francis, M.B. J. Am. Chem. Soc. 2013. 135, 17488–93.
Abby Knight is a fifth-year PhD student in the Francis Group at UC Berkeley, and she and Julia Roberts share a mutual acquaintance: hexavalent chromium.
Roberts may or may not remember the chemical’s name, but it was her nemesis in the 2000 film Erin Brokovich, when she played a single mother agitating for PG&E to pay for contaminating her town’s water. Brokovich successfully forced the industry giant to stop polluting, and that was the end of the movie. But that wasn’t the end of the story, because although the chromium was stopped at the source, no method exists to remove what was already in the water. That’s where Knight comes in.
“There’s no good way to clean up chromium contamination in groundwater,” Knight says. “Right now, the EPA strategy is to just say ‘don’t drink this water’ and wait for it to diffuse. “
“Iron-Catalyzed C-H Borylation of Arenes” Dombray, T.; Werncke, C. G.; Jiang, S.; Grellier, M.; Vendier, L.; Bontemps, S.; Sortais, J-B.; Sabo-Etienne, S.; Darcel, C. J. Am. Chem. Soc. 2015, ASAP. DOI: 10.1021/jacs.5b00895
C-H borylation, itself a green reaction for generating useful borylated compounds, is traditionally catalyzed by Ir and Rh. Much of the work has been conducted by John Hartwig’s group at Berkeley and Mitch Smith’s group at Michigan St. French scientists have now reported an iron-catalyzed version, which complements recent reports with Co complexes and dinuclear transition metal complexes. I especially like that the reported reaction is free of H2 acceptors and utilizes light to activate the catalyst.
An international panel of scientists has found that endocrine disrupting chemicals likely cost the European Union over 100 billion dollars annually — and American officials say this expense could be even higher in the U.S.
The scientific panel, convened by the Endocrine Society, adopted strategies created by the Intergovernmental Panel on Climate Change to evaluate how much causation of a particular disorder could be attributed to a particular chemical. For example, they found 70-100% probability that polybrominated diphenyl ether (PBDE) and organophosphates contribute to IQ loss, based on previously published epidemiological studies. They then estimated the costs incurred to the European Union from health issues caused by exposure to endocrine disrupting chemicals. The health effects investigated included neurobehavioral disorders, male reproductive health issues, and diabetes, and the total cost was found to be at least 100 billion dollars.
“Selective Metal-Catalyzed Transfer of H2 and CO from Polyols to Alkenes” Verendel, J. J.; Nordlund, M.; Andersson, P. G. ChemSusChem, 2013, 6, 426-429. DOI: 10.1002/cssc.201200843
In a recent post I commented on the byproducts of dehydrogenative decarbonylation, namely H2 and CO.
I wondered whether this gas mixture, syngas, could be used in a subsequent reaction. This would improve the atom efficiency of the reaction and potentially also improve the safety (of both the syngas-producing and syngas-using reactions). Both are goals of green chemistry and I especially appreciate avoiding rolling cylinders of toxic and/or flammable gases around the lab.