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European XFEL - News - 2014 - Watching molecular matches

European XFEL - News - 2014 - Watching molecular matches | Physics | Scoop.it

Scientists at the European XFEL will watch the interplay of molecules with the instrument FXE, allowing stunning insight in the electronic forces driving the world of chemistry.

Mikko Hakala's insight:

 

Chemical reactions take place in femtoseconds (10^-15 s). Traditionally one just analyses the initial and final products of a reaction, but new instruments like X-ray free electron lasers start to enable following the actual development of the geometries and electronic states.

 

The femtochemistry as studied at European XFEL is explained in the feature article: http://www.xfel.eu/news/2014/watching_molecular_matches/index.html

 

See a simulation of an UV-light triggered reaction: https://www.youtube.com/watch?v=qAT6SkiEN9M

 

 

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Design and synthesis of the first triply twisted Möbius annulene : Nature Chemistry : Nature Publishing Group

Design and synthesis of the first triply twisted Möbius annulene : Nature Chemistry : Nature Publishing Group | Physics | Scoop.it
Most cyclic conjugated molecules, such as benzene, exhibit two sides. Möbius annulenes, however, with an odd number of 180° twists in their π system are one-sided and violate the Hückel rule. Now, using a topological trick it is demonstrated that triply twisted systems are not particularly strained and probably easier to synthesize than singly twisted ones.
Mikko Hakala's insight:

Topology and chemistry combined: Annulene in a Möbius ring configuration with three twists. Applications could be found in optoelectronics and nanotechnology.

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