cisazobenzene

Cisazobenzene is an organic compound with the chemical formula C12H10N2. It is a geometrical isomer of azobenzene, with the cis configuration meaning that the two phenyl rings are on the same side of the nitrogen-nitrogen double bond. This differs from transazobenzene, where the phenyl rings are on opposite sides. The cis isomer is generally less stable than the trans isomer and can be converted to the trans form upon heating or exposure to light.

Cisazobenzene is a yellow crystalline solid. Its synthesis typically involves the reduction of nitrobenzene or related compounds under specific conditions that favor the formation of the cis isomer. It has been studied for its photochemical properties, as it can undergo isomerization upon irradiation with UV light. This photoisomerization is a reversible process, meaning that cisazobenzene can be converted to transazobenzene and vice versa by changing the wavelength of light.

Due to its light-sensitive nature, cisazobenzene has found applications in research related to photochromic materials and molecular switches. These materials can change their color or other properties upon exposure to light, and the ability to control this change with light makes them potentially useful in areas like optical data storage or smart materials. However, practical applications are often limited by the stability and efficiency of the isomerization process. The compound also exhibits different spectroscopic properties compared to its trans counterpart, which aids in its characterization and study.

---