Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Frustrated Pair Captures CO2

02.07.2009
Novel concept for the binding of carbon dioxide without a metal-containing catalyst

Carbon dioxide contributes to the greenhouse effect, but practicable solutions for its capture and storage have not really been found.

However, it might be possible to kill two birds with one stone if carbon dioxide could be used as a raw material. Unlike the carbon sources commonly used today—fossil fuels and natural gas— carbon dioxide is a renewable resource and an environmentally friendly chemical reagent.

Unfortunately, the carbon–oxygen bonds are too strong to be broken easily. Until now, this has mainly been achieved with the use of metal-containing catalysts. A German–Canadian cooperative effort has now developed a new concept that works without metals: as they report in the journal Angewandte Chemie, the team led by Gerhard Erker and Stefan Grimme at the University of Münster and Douglas W. Stephan at the University of Toronto uses so-called frustrated Lewis acid/base pairs to reversibly bind carbon dioxide under mild conditions.

An organic borane and an organic phosphine form a typical Lewis pair: As a Lewis base, the phosphine has too many electrons. The borane on the other hand, a Lewis acid, has an electron deficiency. The Lewis base thus makes its free electron pair available to the Lewis acid. The phosphine and borane form an adduct that is held together by way of the shared electron pair. However, if both partners have bulky side groups, they cannot come together to form the desired bond. They are then described as a “frustrated” Lewis pair.

The researchers exposed a solution of such a frustrated pair to an atmosphere of CO2 under two bars of pressure. This immediately resulted in a reaction, which formed a white solid. What happened? The phosphorus atom in the frustrated phosphine uses its electron pair to bind to the carbon of the CO2, and the boron atom of the frustrated borane snaps up the free electron pair of one of the oxygen atoms of the CO2 and binds to it. In this way, the carbon dioxide couples the two partners together, alleviating their frustration.

With the application of heat or certain solvents, the carbon dioxide can be released and the Lewis pair returned to its original frustrated state. The researchers are now investigating how the captured CO2 could be chemically transformed for use as a feedstock.

Author: Gerhard Erker, Universität Münster (Germany), http://www.uni-muenster.de/Chemie.oc/erker/index.html

Title: Reversible Metal-Free Carbon Dioxide Binding by Frustrated Lewis Pairs

Angewandte Chemie International Edition, doi: 10.1002/anie.200901636

Gerhard Erker | Angewandte Chemie
Further information:
http://pressroom.angewandte.org
http://www.uni-muenster.de/Chemie.oc/erker/index.html

Further reports about: Angewandte Chemie CO2 Carbon carbon dioxide carbon source oxygen atom

More articles from Life Sciences:

nachricht Multi-institutional collaboration uncovers how molecular machines assemble
02.12.2016 | Salk Institute

nachricht Fertilized egg cells trigger and monitor loss of sperm’s epigenetic memory
02.12.2016 | IMBA - Institut für Molekulare Biotechnologie der Österreichischen Akademie der Wissenschaften GmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>