Azobenzene groups 366 Subject

Photoisomerization of an azobenzene function located in a complex molecule is often accompanied by conformational changes. This approach has again been employed in the construction of photoresponsive crown ethers, a topic which has been the subject of a recent review. Cylindrical ionophores in which two diaza-crown ethers are linked by two photoresponsive azobenzene groups change their ability to bind polymethylene-diammonium salts on irradi-... 

Our research is using high glass transition temperature amorphous polymers in which substituted azobenzenes are bound on the side chain or in the main chain, as thin films. The films are subjected to polarized light, which induces trans-cis-trans isomerization cycles and subsequent rearrangement of the azobenzene groups preferentially perpendicular to the polarization direction. This preferential director of the azobenzene groups creates a dichroism... 

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