Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Boroles get a stability boost

06.08.2015

Boroles could be a highly interesting class of materials for practical use in photovoltaic or LED applications – if it weren't for the molecules' extreme instability. Chemists from Würzburg have now discovered a powerful stabiliser.

Boroles are boron containing molecules that have great electron-accepting ability. This makes them excellently suited for materials that could bring further improvements to photovoltaics or OLEDs. But so far, boroles have had one major drawback: They are highly unstable and decay virtually immediately when in contact with water or oxygen.


Fluoromesityl groups boost the stability of boroles. F stands for fluorine, B for boron and C for carbon.

(Picture: Todd Marder)

Chemists at the University of Würzburg have now made an important step forward: Todd Marder and fellow chemists at the Institute of Inorganic Chemistry have significantly stabilised borole molecules by adding a so-called fluoromesityl group, which makes the highly sensitive boroles about 600 times more resistant to water. As a result, the molecules are stable for ten to twelve hours compared to just one minute without the stabilising group. Their electron-accepting ability is fully preserved.

Now the new molecules' robustness will be verified in further tests. The fluoromesityl boroles have proved to be heat resistant and easily vapourable. Therefore, the Würzburg chemists are now eager to investigate whether the novel boroles can be vapour deposited on substrates in wafer-thin films. This would be a major prerequisite for technological applications. Moreover, the scientists are looking for other molecule groups that might stabilise boroles even more efficiently.

“Taming the beast: fluoromesityl groups induce a dramatic stability enhancement in boroles”, Zuolun Zhang, Robert M. Edkins, Martin Haehnel, Marius Wehner, Antonius Eichhorn, Lisa Mailänder, Michael Meier, Johannes Brand, Franziska Brede, Klaus Müller-Buschbaum, Holger Braunschweig, and Todd B. Marder. Chemical Science, published online 13 July 2015, DOI: 10.1039/C5SC02205C

Great collaborative spirit

Todd Marder's team with the work groups of Holger Braunschweig and Klaus Müller-Buschbaum has published the results in the magazine "Chemical Science". Marder emphasises that the joint research of boroles is characterised by a great collaborative spirit which is generally true for the atmosphere at the Würzburg department. The US chemist has researched and taught in Würzburg since 2012. In the 15 years before, he had been head of department at Durham University in England.

An excellent global network

He also points out that the Würzburg Department of Chemistry has an excellent global network: "Everyone here is committed to getting top-class international scientists to work in Würzburg." The Humboldt Foundation supports this goal by awarding generous grants to postdocs. The two initial authors of the publication in "Chemical Science", Zuolun Zhang from China and Robert M. Edkins from the UK, also arrived in Würzburg with a Humboldt scholarship in their pockets.

Comment for "Science" magazine

Shubhankar Kumar Bose from India joined the University of Würzburg as a Humboldt scholar and stayed there as a postdoc. Only recently did he and Todd Marder author a comment for "Science" magazine: As experts in boron chemistry and boron catalysis, the two scientists had been invited by the leading magazine to assess the work of a Canadian chemist ("A leap ahead for activating C-H bonds", 31 July 2015, Science Vol. 349 Issue 6247, p 473-474). This is another example of the international renown of the Würzburg Department of Chemistry

Top result in Shanghai Ranking

Accordingly, the Department of Chemistry has achieved good ranking results in the renowned Shanghai Ranking ("Academic Ranking of Universities Worldwide") of Jiao-Tong University for many years. In 2014, they ranked 30th among the more than 1,200 universities that were assessed which corresponds to rank two in the Germany-wide comparison. The Shanghai Ranking evaluates the research performance of universities according to various parameters.

Contact

Prof. Dr. Todd Marder, Institute of Inorganic Chemistry, University of Würzburg, Phone +49 931 31-85514, todd.marder@uni-wuerzburg.de

Robert Emmerich | idw - Informationsdienst Wissenschaft
Further information:
http://www.uni-wuerzburg.de

More articles from Life Sciences:

nachricht Cryo-electron microscopy achieves unprecedented resolution using new computational methods
24.03.2017 | DOE/Lawrence Berkeley National Laboratory

nachricht How cheetahs stay fit and healthy
24.03.2017 | Forschungsverbund Berlin e.V.

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>