Navigation Links
A molecular ripcord for chemical reactions
Date:4/6/2009

Researchers at Eindhoven University of Technology (TU/e) have developed an entirely new method for starting chemical reactions. For the first time they used mechanical forces to control catalytic activity one of the most fundamental concepts in chemistry. This allowed them to initiate chemical reactions with mechanical force. This discovery paves the way to developing materials capable of repairing themselves under the influence of mechanical tension. The results of their research will be published online on 6 April 2009 in the new international journal Nature Chemistry.

Molecular ripcord

The research team (Dr. Alessio Piermattei, Dr. Karthik Sivasubramanian and Dr. Rint Sijbesma) of the Institute for Complex Molecular Systems (ICMS) and the Department of Chemical Engineering and Chemistry, both at TU/e, is the first to have demonstrated that a catalyst can be switched from a dormant to an active state (see illustration) by pulling on a polymer chain, a "molecular ripcord." The researchers were able to use this catalyst to initiate a variety of chemical reactions, including polymerizations (formation of polymer chains from small molecular building blocks called monomers).

Self-repairing materials

This discovery paves the way to creating self-repairing materials that strengthen under the influence of mechanical stress. If a material were to tear, for example, this would simultaneously break the metal complex in half, thereby activating the catalyst, and the material would be instantly repaired.

This work will also lead to research into other applications in which it should be possible to turn chemical reactions on and off as desired. Potential applications include the injection molding of plastic objects, where the technique could be used to simplify processing, or microscale chemical synthesis.

How does it work; weakest link

The researchers packed a catalytically active metal ion completely in using two molecular caps (ligands). They attached two polymer chains to these caps, creating a long chain with a metal complex in the center. These complexes were dissolved in a liquid that was irradiated with ultrasound, causing bubbles to form in the liquid. When these bubbles imploded, they created an extremely strong current that stretched the chains and ultimately broke its weakest link the metal complex in two. The cap on one end was now broken off from the active metal ion, which allowed the metal ion to become catalytically active. In other words, it could now accelerate chemical reactions.


'/>"/>

Contact: Dr. Rint Sijbesma
r.p.sijbesma@tue.nl
31-402-473-737
Eindhoven University of Technology
Source:Eurekalert  

Related biology technology :

1. Data on WaferGens SmartChip(TM) System Presented at 16th International Molecular Medicine Tri-Conference
2. Amsterdam Molecular Therapeutics Reports Full Year Results 2008
3. Data on WaferGens SmartChip Real-Time PCR System(TM) to be Presented at 16th International Molecular Medicine Tri-Conference
4. Frost & Sullivan Names Naviscan a Leader in the Future of Molecular Breast Imaging
5. Fraunhofer USA Center for Molecular Biotechnology Receives Gates Foundation Grant for Avian Influenza Vaccine Development
6. Researchers: Molecular forklifts overcome obstacle to smart dust
7. In 2008, Ipsogen Reinforced its Leadership in Molecular Diagnosis and Monitoring of Leukemia
8. Fast molecular rearrangements hold key to plastics toughness
9. Imaging in Living Color with Siemens Molecular CT
10. Fast molecular rearrangements hold key to plastic’s toughness
11. China Medical Technologies Completes the Development of EGFR Molecular Diagnostic Kits
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A molecular ripcord for chemical reactions
(Date:6/23/2016)... A person commits a crime, and the detective ... the criminal down. An outbreak of foodborne illness ... (FDA) uses DNA evidence to track down the bacteria that ... It,s not. The FDA has increasingly used a complex, cutting-edge ... illnesses. Put as simply as possible, whole genome sequencing is ...
(Date:6/23/2016)... , June 23, 2016   EpiBiome , ... secured $1 million in debt financing from Silicon Valley ... up automation and to advance its drug development efforts, ... new facility. "SVB has been an incredible ... the services a traditional bank would provide," said Dr. ...
(Date:6/23/2016)... 23, 2016  Blueprint Bio, a company dedicated to ... medical community, has closed its Series A funding round, ... "We have received a commitment from Forentis ... need to meet our current goals," stated Matthew ... runway to complete validation on the current projects in ...
(Date:6/23/2016)... ... June 23, 2016 , ... Velocity ... intelligent tools designed, tuned and optimized exclusively for Okuma CNC machining centers at ... result of a collaboration among several companies with expertise in toolholding, cutting tools, ...
Breaking Biology Technology:
(Date:4/28/2016)... -- First quarter 2016:   , Revenues ... first quarter of 2015 The gross margin was 49% ... and the operating margin was 40% (-13) Earnings per ... from operations was SEK 249.9 M (21.2) , Outlook ... 7,000-8,500 M. The operating margin for 2016 is estimated ...
(Date:4/26/2016)... 2016 Research and Markets has ... Market 2016-2020"  report to their offering.  , ,     ... The analysts forecast the global multimodal biometrics market ... the period 2016-2020.  Multimodal biometrics is ... as the healthcare, BFSI, transportation, automotive, and government ...
(Date:4/15/2016)...  A new partnership announced today will help ... in a fraction of the time it takes ... life insurance policies to consumers without requiring inconvenient ... Diagnostics, rapid testing (A1C, Cotinine and HIV) and ... weight, pulse, BMI, and activity data) available at ...
Breaking Biology News(10 mins):