Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Light and Air

19.11.2012
Sunlight-driven CO2 fixation

The increased use of renewable energy sources, particularly sunlight, is highly desirable, as is industrial production that is as CO2-neutral as possible. Both of these wishes could be fulfilled if CO2 could be used as the raw material in a system driven by solar energy.



Japanese researchers have now introduced an approach to this type of process in the journal Angewandte Chemie. Their method is based on a principle similar to natural photosynthesis.

The use of carbon dioxide as a source of carbon may be an attractive option for reducing the consumption of fossil feedstocks and improving the CO2 footprint of chemical products. The biggest obstacle in our way is the high stability of the CO2 molecule. One of the possibilities for jumping this hurdle is to use very high-energy molecules to react with CO2.

The photosynthetic process in green plants provides an example of how this could work. This process takes place in two steps: the light reactions and the dark reactions. In the light reactions, the photosynthetic system captures photons and stores their energy in the form of energetic chemical compounds. These are subsequently used to drive the dark reactions that use CO2 as a carbon source to synthesize complex sugar molecules.

Researchers working with Masahiro Murakami at Kyoto University used the same principle to design their process. In this case, the first step is also a reaction driven by light. The action of UV light can convert the starting material, an á-methylamino ketone, to a very energetic molecule.

This also works with sunlight, as the researchers found out. An intramolecular rearrangement with ring closure results in a molecule containing a ring made of three carbon atoms and one nitrogen atom. This type of ring is under a great deal of strain and is correspondingly reactive. This “light reaction” was coupled to a “dark reaction”: In the subsequent light-independent step, the highly energetic compound captures CO2 in the presence of a base. This forms a cyclic amino-substituted carbonic acid diester that could be useful as an intermediate for chemical syntheses.

The striking thing about this reaction scheme is that the technique is simple. Diffuse sunlight on cloudy days is enough to drive the process. The second step can be carried out in the same reaction vessel through simple addition of the base and heating to 60 °C. The yield is 83 %. In addition, the process is very adaptable because a wide variety of á-methylamino ketones can be used as starting materials.

About the Author
Dr Masahiro Murakami is a Professor of Kyoto University. He has been working in the area of organic chemistry and organometallic chemistry, especially the development of new reactions directed towards organic synthesis. He is the recipient of the Nagoya Silver Medal.
Author: Masahiro Murakami, Kyoto University (Japan), http://www.sbchem.kyoto-u.ac.jp/murakami-lab/contact/contact.html
Title: Solar-Driven Incorporation of Carbon Dioxide into á-Amino Ketones
Angewandte Chemie International Edition 2012, 51, No. 47, 11750–11752, Permalink to the article: http://dx.doi.org/10.1002/anie.201206166

Masahiro Murakami | Wiley-VCH
Further information:
http://dx.doi.org/10.1002/anie.201206166
http://pressroom.angewandte.org

More articles from Life Sciences:

nachricht Fruit fly studies shed light on adaptability of nerve cells
17.04.2015 | Deutsches Zentrum für Neurodegenerative Erkrankungen e.V. (DZNE)

nachricht Rare monkey photographed in Congo's newest national park, Ntokou-Pikounda
17.04.2015 | Wildlife Conservation Society

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Astronomers reveal supermassive black hole's intense magnetic field

Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a supermassive black hole in a distant galaxy

Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a...

Im Focus: A “pin ball machine” for atoms and photons

A team of physicists from MPQ, Caltech, and ICFO proposes the combination of nano-photonics with ultracold atoms for simulating quantum many-body systems and creating new states of matter.

Ultracold atoms in the so-called optical lattices, that are generated by crosswise superposition of laser beams, have been proven to be one of the most...

Im Focus: UV light robot to clean hospital rooms could help stop spread of 'superbugs'

Can a robot clean a hospital room just as well as a person?

According to new research out of the Texas A&M Health Science Center College of Medicine, that is indeed the case. Chetan Jinadatha, M.D., M.P.H., assistant...

Im Focus: Graphene pushes the speed limit of light-to-electricity conversion

Researchers from ICFO, MIT and UC Riverside have been able to develop a graphene-based photodetector capable of converting absorbed light into an electrical voltage at ultrafast timescales

The efficient conversion of light into electricity plays a crucial role in many technologies, ranging from cameras to solar cells.

Im Focus: Study shows novel pattern of electrical charge movement through DNA

Electrical charges not only move through wires, they also travel along lengths of DNA, the molecule of life. The property is known as charge transport.

In a new study appearing in the journal Nature Chemistry, authors, Limin Xiang, Julio Palma, Christopher Bruot and others at Arizona State University's...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

HHL's Entrepreneurship Conference on FinTech

13.04.2015 | Event News

World Conference On Regenerative Medicine 2015: Registration And Abstract Submission Now Open

25.03.2015 | Event News

University presidents from all over the world meet in Hamburg

19.03.2015 | Event News

 
Latest News

Engineer Improves Rechargeable Batteries with MoS2 Nano 'Sandwich'

17.04.2015 | Power and Electrical Engineering

Comparing Climate Models to Real World Shows Differences in Precipitation Intensity

17.04.2015 | Earth Sciences

A blueprint for clearing the skies of space debris

17.04.2015 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>