Highly Fluorescent Slipped-Cofacial Phthalocyanine Dimer as a Shallow Inclusion Complex with alpha-Cyclodextrin

作者：Morisue Mitsuhiko^*; Ueda Shun; Kurasawa Masaki; Naito Masanobu; Kuroda Yasuhisa

来源：Journal of Physical Chemistry A, 2012, 116(21): 5139-5144.

DOI：10.1021/jp302640j

Supramolecular control of the pi-stacked configuration of aqueous phthalocyanine (Zn[Pc(SO3)(4)]) was achieved, allowing organization of a J-type slipped-cofacial dimer with per-O-methylated alpha-cyclodextrin (TMe-alpha-CDx) by the aid of host-guest interactions. Pristine Zn[Pc(SO3)(4)] forms nonfluorescent face-to-face aggregates in water. The pi-stacked configuration was controlled in the slipped-cofacial dimer, which was formed as a shallow inclusion complex with TMe-alpha-CDx, giving remarkably enhanced fluorescence with a very small Stokes shift. Organization of the J-type slipped-cofacial dimer as a 2:2 Zn[Pc(SO3)(4)] TMe-alpha-CDx complex was achieved through pi-stacking of the unencapsulated segment of Zn[Pc(SO3)(4)] shallowly encapsulated by a small TMe-alpha-CDx cavity.

• 出版日期2012-5-31