In synthetic chemistry, so-called element-element bonding can be systematically exploited to assemble small building blocks to obtain structures that are more complex than the “starting material” and can be used for the resource-saving production of more precious materials.
In the newly discovered coupling reaction, molecule A is transformed into four-atom boron chain B
Scientists at Heidelberg University’s Institute of Inorganic Chemistry have discovered a hitherto unknown coupling reaction. Two positively charged compounds of the element boron join to form a new molecule with a chain of four boron atoms. The team headed by Prof. Dr. Hans-Jörg Himmel now intends to investigate the further implications of this unexpected bond formation.
In carbon chemistry, element-element coupling reactions play a crucial role. For example, small building blocks with very few carbon atoms of the kind produced by the steam cracking of crude oil are assembled to generate a broad range of products, including plastics, fuels, lipids and detergents, as well as more complex substances like pharmaceutical agents.
Due to this great significance, a large number of synthesis variants have been developed. In their research work the Heidelberg scientists focus on coupling reactions of this kind with compounds involving the element boron which are similar in structure to the corresponding carbon compounds.
As Professor Himmel explains, the new element-element combinations normally result from a reaction between two electrically neutral or differently polarised atoms, not between two positively or two negatively polarised ones. But now the Heidelberg researchers have discovered a coupling reaction in which two positively charged molecules bond together. This is made possible by so-called multi-centre bonding, which plays a significant role in boron chemistry. “The product of this reaction is a compound with four boron atoms,” says Prof. Himmel. “This in its turn is a promising precursor on the route toward the making of complex boron chains.”
Such compounds of the element boron were unknown so far, says the Heidelberg chemist. He and his team are now investigating the further combination of the four-atom boron chain to form boron chain polymers expected to possess high electrical conductivity and other useful material properties. Such materials would be of interest for electronic and optoelectronic applications, Prof. Himmel concludes. The research results have now been published in “Nature Chemistry”.
Marietta Fuhrmann-Koch | idw
Scientists uncover the role of a protein in production & survival of myelin-forming cells
19.07.2018 | Advanced Science Research Center, GC/CUNY
NYSCF researchers develop novel bioengineering technique for personalized bone grafts
18.07.2018 | New York Stem Cell Foundation
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences