Incorporation of azobenzenes into disc-like shape-persistent macrocycles offers the opportunity to change the spacial arrangement from the 2 dimensional.

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Incorporation of azobenzenes into disc-like shape-persistent macrocycles offers the opportunity to change the spacial arrangement from the 2 dimensional flat structure to a 3 dimensional geometry, allowing alteration of their supramolecular assembly.

Summary: A new molecular system based on dimeric trisazobiphenyl macrocycles has been prepared, which displays switchable pi-stacking interaction upon UV irradiation. This property is utilized to build up light-controlled 3-dimensional networks, which form switchable gels with aromatic solvents. Should be applicable to bind other small molecules and release them on demand just with light.