在
三氟乙酸 作用下,
以
various solvent(s) 为溶剂,
反应 12.0h,
以50%的产率得到
参考文献:
名称:
Expanding Dendrons. The Photoisomerism of Folded Azobenzene Dendrons
摘要:
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 syn-syn 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.
Expanding Dendrons. The Photoisomerism of Folded Azobenzene Dendrons
摘要:
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 syn-syn 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.