Electrical properties of dendritic macromolecule containing azo-groups

We synthesized the G4-48Azo dendrimer functionlized with azobenzene groups, fully reversible photo-isomerization reaction, in their periphery. We investigated monolayer behavior and its characteristics at air-water interface by LB method. And we observed the difference of molecular behavior and measured the surface pressure shift by 365[nm]light irradiation because of the photo-isomerization of the azobenzene group in their periphery. The electrical properties of the G4-48Azo dendrimer were compared with between trans form and cis form using metal/dendrimer LB film/metal(MIM)structure and STM system. And we obtained the difference of values in I-V characteristics using STM originating from the photo-isomerization of the azobenzene.