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Expanding Dendrons. The Photoisomerism of Folded Azobenzene Dendrons

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journal contribution
posted on 25.10.2006, 00:00 authored by Christopher J. Gabriel, Jon R. Parquette
Irradiation of a folded azobenzene dendron system triggers a large, reversible structural expansion. The dendrons adopt a compact helical conformation in the stable E form owing to the E geometry of azo linkage and the synsyn preference of the dendritic branch points. E Z photoisomerization disrupts this folded conformation in a manner that decreases the packing efficiency and results in an expansion in hydrodynamic volume.

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