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Ultrafast X-rays reveal how the light-responsive molecular switch azobenzene changes shape
Azobenzene is one of the best-known molecules that can be switched between two forms by light.
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Summary
Azobenzene is one of the best-known molecules that can be switched between two forms by light. However, the question of how the molecule moves in the first few picoseconds (trillionths of a second) after it absorbs light has remained unresolved for nearly 50 years.
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