A red-orange organic compound containing two benzene rings connected by a nitrogen-nitrogen double bond, commonly used in dyes and research.
From 'azo-' (from azo group, containing N=N bonds) combined with 'benzene' (the basic aromatic hydrocarbon ring). The azo prefix comes from German chemists studying nitrogen-containing dyes in the 19th century.
Azobenzene is a molecular shape-shifter—it changes its entire 3D structure when you shine light on it, making it useful for creating 'smart' materials that respond to sunlight. This property has inspired researchers to build tiny molecular motors and light-controlled switches at the nanoscale.
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