title: Energy transfer in a mechanically trapped exciplex.
abstract: Host-guest complexes involving M(6)L(4) coordination cages can display unusual photoreactivity, and enclathration of the very large fluorophore bisanthracene resulted in an emissive, mechanically trapped intramolecular exciplex. Mechanically linked intramolecular exciplexes are important for understanding the dependence of energy transfer on donor-acceptor distance, orientation, and electronic coupling but are relatively unexplored. Steady-state and picosecond time-resolved fluorescence measurements have revealed that selective excitation of the encapsulated guest fluorophore results in efficient energy transfer from the excited guest to an emissive host-guest exciplex state.
authors.affiliation: Department of Applied Chemistry, School of Engineering, The University of Tokyo, and JST, CREST, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
authors.forename: Jeremy K
authors.initials: JK
authors.lastname: Klosterman
authors.forename: Munetaka
authors.initials: M
authors.lastname: Iwamura
authors.forename: Tahei
authors.initials: T
authors.lastname: Tahara
authors.forename: Makoto
authors.initials: M
authors.lastname: Fujita