Portal de Periódicos da CAPES

Photoresponsive Dissipative Macrocycles Using Visible‐Light‐Switchable Azobenzenes

2022; Wiley; Volume: 61; Issue: 48 Linguagem: Inglês

10.1002/anie.202212745

1521-3773

Esther Nieland, Jona Voss, Andreas Mix, Bernd M. Schmidt,

Photoreceptor and optogenetics research

Visible light can be used to shift dynamic covalent imine assemblies out of equilibrium. We studied a fluorinated azobenzene building block that reliably undergoes geometric isomerism upon irradiation. The building block was used in combination with two different amines, ethylenediamine and R,R-1,2-diaminocyclohexane, to create a library of imine macrocycles. Whereas the simple amine can be used to access a polymeric state and a defined bowl-shaped macrocycle, the chiral amine gives access to a rich network of macrocycles that undergo both isomerisation as well as interconversion between different macrocyclic species, thereby allowing for control over the number of monomers involved in the cyclo-oligomerization;