American Chemical Society
ja066126z_si_001.pdf (698.04 kB)

Expanding Dendrons. The Photoisomerism of Folded Azobenzene Dendrons

Download (698.04 kB)
journal contribution
posted on 2006-10-25, 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.