Both mechanisms are in practice only the latter predominates report Wybren Jan Buma and colleagues

Especially monohybrid cross torsional vibrations of the central nitrogen-nitrogen double bond are responsible for the operation of azobenzene as a light-sensitive switch. Conclude UvA researchers monohybrid cross with multicolored high-resolution laser spectroscopy, the mechanism for the first time unequivocally image have to get to know.
It points the way to more efficient ways to play with those azobenzeenfunctionaliteit, and also proves that this form of laser spectroscopy is extremely useful when you want to follow fast photodynamic processes in detail.
Azobenzene which forms the core of many light-sensitive organic compounds. Under the influence of UV light, the trans isomer is about in the less stable cis-isomer, monohybrid cross and with blue light, or heat can you rotate it back again. Many molecular motor is based on this principle of operation. A year ago Twente researchers took even the newspapers azobenzeengedreven plastic film, and there's already been suggested to control the dosage of chemotherapy with it.
Only was up to now not clear how the cis-trans transition exactly in each other. Trans -azobenzene exhibits a perfect tip symmetry and lichtabsorpie alone can never be enough, according to the laws of quantum mechanics. monohybrid cross
It can be classified as a light absorption during that move the two halves of the molecule monohybrid cross relative to each other, so that the symmetry for a moment is out. And then there are two possibilities: monohybrid cross either the azobenzene remains flat but the two benzene rings sway back and forth around the double bond, or it does not remain flat and rings look each other right on.
Both mechanisms are in practice only the latter predominates report Wybren Jan Buma and colleagues now in Nature Communications. First author Eric Tan is promoted at the end of November a study that yielded the first positive experimental evidence for this assertion.
According Buma makes an end to a debate monohybrid cross that seemed monohybrid cross endless until recently. "For each new experimental result was to find a theoretical monohybrid cross study that seemed to support that interpretation. The obtained experimental data to explain what we are concerned, the 'playing field' unambiguously. " monohybrid cross
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