Navigation Links
Breaking harmful bonds
Date:8/28/2008

Waltham, MAEverybody loves the way breakfast eggs conveniently slide off of Teflon without leaving any pesky pieces of egg in the pan. Indeed, the carbon-fluorine bond at the heart of Teflon cookware is so helpful we also use it in clothing, lubricants, refrigerants, anesthetics, semiconductors, and even blood substitutes. But the very strength of the C-F bond that makes it useful in so many applications also gives it formidable greenhouse gas effects that persist in nature. In a groundbreaking study this week in Science, Brandeis scientists report they have identified a catalyst that efficiently breaks the C-F bond and converts it to a carbon-hydrogen bond, rendering it harmless to the environment.

Chlorofluorocarbons (CFCs or freons) are harmful to the ozone layer. Hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs) are generating concern because they are considered super-greenhouse gases, with great potential to warm the environment by trapping solar radiation and remaining virtually indestructible in the atmosphere.

"The C-F bond is difficult to transform into other bonds under mild conditions because it is inert and unreactive; it's a challenge to chemists," said lead author chemist Oleg Ozerov, who conducted the research with postdoc Christos Douvris. "But we found a way to take a C-F bond that you can do very little with and break it and convert it cleanly into something else at room temperature."

With research support from the Department of Energy, Sloan Foundation, and Research Corporation, Ozerov identified a new catalytic process for a class of carborane-silylium compounds that causes the bonds in representative HFCs to react at room temperature, swapping their carbon-fluorine bonds for carbon-hydrogen bonds. The silylium catalyst performs the critical task of breaking the C-F bond by abstracting the fluoride from the fluorocarbon and attaching it to a silicon atom. The end product is a compound with a silicon-flu
'/>"/>

Contact: Laura Gardner
gardner@brandeis.edu
781-736-4204
Brandeis University
Source:Eurekalert

Page: 1 2

Related biology news :

1. EPA funds ground-breaking Lyme disease research
2. Breaking news: Study revives Olympic prospects for amputee sprinter
3. Shell-breaking crabs lived 20 million years earlier than thought
4. BGSU undergraduates to pilot groundbreaking genome project
5. Scientists discover record-breaking hydrogen storage materials for use in fuel cells
6. Speed plays crucial role in breaking proteins H-bonds
7. Groundbreaking Canada-US study proves link between emissions and mercury pollution in fish
8. Groundbreaking Canada-US study proves link between emissions and mercury pollution in fish
9. Certain anticancer agents could be harmful to patients with heart disease
10. Harmful algae taking advantage of global warming
11. Fish oil -- helpful or harmful?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2014)... WEST LAFAYETTE, Ind. - Purdue and West Virginia University ... the golden eagle, providing a bird,s-eye view of eagle ... , Their study calls into question long-held assumptions ... not be as sensitive to ultraviolet light as previously ... have a sharper sense of smell than researchers realized. ...
(Date:4/24/2014)... published in the Scientific Reports journal. , CSIC ... joint centre of CSIC and Pompeu Fabra University-UPF), explains: "When ... we saw that it did not match with the DNA ... the complete genome and to make a functional interpretation in ... Louis XVI". , The functional genome analysis was based ...
(Date:4/24/2014)... N.C. -- A new study representing the largest study of ... broader diets have better self-control. , Published this week in ... , the study is part of a long history of ... some species able to do things like make and use ... others aren,t? , Until now, most studies of animal ...
Breaking Biology News(10 mins):Genome yields insights into golden eagle vision, smell 2The blood preserved in the pumpkin did not belong to Louis XVI 2Animals with bigger brains, broader diets have better self control 2Animals with bigger brains, broader diets have better self control 3
... detection techniques developed at the University, the team mapped ... and developed a model of their likely distribution as ... action is needed. University of Canberra professor in ... found foxes are widespread in northern and eastern Tasmania ...
... University of Southampton has shown that copper can ... to the increasing number of antibiotic-resistant infections worldwide. ... largely responsible for the development of antibiotic-resistance, which ... healthcare-associated infections (HCAIs). The newly-published paper, which ...
... Institution are rolling out results from the new Airborne ... at the American Geophysical Union (AGU) meetings in San ... uncovering a previously invisible ecological world. To watch a ... the world in a whole new way, click here. ...
Cached Biology News:Fox invasion threatens wave of extinction, UC research finds 2New study shows how copper restricts the spread of global antibiotic-resistant infections 2Carnegie debuts revolutionary biosphere mapping capability at AGU 2Carnegie debuts revolutionary biosphere mapping capability at AGU 3
(Date:1/14/2014)... 14, 2014 Date: Friday, April 11, 2014 ... Country Club, 1360 Almshouse Road, Warrington, Pa. , ... solely dedicated to finding a cure for hepatitis B and ... host its annual Crystal Ball on Friday, April 11 at ...
(Date:1/14/2014)... York, NY (PRWEB) January 14, 2014 ... of Alliqua, Inc. (OTCQB: ALQA). Alliqua is an emerging ... to serve the wound care market. , Free report ... was restructured with a seasoned management team and Board, ...
(Date:1/14/2014)... , Jan. 14, 2014  RXi Pharmaceuticals Corporation ... developing and commercializing innovative therapies addressing major unmet ... it received the Notice of Allowance from the ... unique self-delivering RNAi compounds (sd-rxRNA®), for the treatment ...
(Date:1/14/2014)... During the 1600’s through the 1800’s doctors ... Plague.” In this time period, doctors did not know that ... to the death of vulnerable patients. In the same way, ... may be unwittingly transmitting herpes viruses to their patients. The ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 2Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 3
... BOSTON, Mass., June 4 Experts with ... PAREXEL,International Corporation (Nasdaq: PRXL ), a ... 2008 BIO,International Convention to be held June ... in San Diego, California. PAREXEL has worked ...
... do the French get away with a clean bill of ... The answer to the so-called "French paradox" may be found ... doses of resveratrol, a natural constituent of grapes, pomegranates, red ... an international team of researchers. , Writing this week (June ...
... Mass., June 3 Xceed Molecular, a ... analysis,systems, has granted Gen-Probe Incorporated (Nasdaq: ... to use Xceed,s novel Flow-Thru Chip,technology. Gen-Probe ... its,next-generation multiplexed molecular-diagnostics products. Gen-Probe is a,global ...
Cached Biology Technology:PAREXEL Product Development and Regulatory Experts to Attend the 2008 BIO International Convention 2PAREXEL Product Development and Regulatory Experts to Attend the 2008 BIO International Convention 3PAREXEL Product Development and Regulatory Experts to Attend the 2008 BIO International Convention 4Agent in red wine found to keep hearts young 2Agent in red wine found to keep hearts young 3Xceed Molecular Grants Gen-Probe License to Xceed's Flow-Thru Chip(R) Technology for Multiplex Molecular Diagnostics 2