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.
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.
Prof. Dr. Todd Marder, Institute of Inorganic Chemistry, University of Würzburg, Phone +49 931 31-85514, email@example.com
Robert Emmerich | idw - Informationsdienst Wissenschaft
Symbiotic bacteria: from hitchhiker to beetle bodyguard
28.04.2017 | Johannes Gutenberg-Universität Mainz
Nose2Brain – Better Therapy for Multiple Sclerosis
28.04.2017 | Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
28.04.2017 | Event News
20.04.2017 | Event News
18.04.2017 | Event News
28.04.2017 | Medical Engineering
28.04.2017 | Earth Sciences
28.04.2017 | Life Sciences