Molecular nano-lenses: Directed energy migration and back-transfer in dendrimeric antenna supermolecules

Stephen F. Swallen, Michael R. Shortreed, Zhong You Shi, Weihong Tan, Zhifu Xu, Chelladurai Devadoss, Jeffrey S. Moore, Raoul Kopelman

Research output: Contribution to journalConference articlepeer-review


Experimental and theoretical evidence is presented for the process of directed, multistep energy transport in a unique class of fractal-like dendrimeric supermolecules. Due to the meta-position branching arrangement of these Cayley trees, tight excitation localization is observed at the branching nodes. Particular forms of these dendrimers have been synthesized with localized states of decreasing energy toward the molecular locus, creating a rapid and efficient exciton funnel. Spectroscopic data is presented illustrating nearly unit transfer efficiency from the dendrimer periphery to a specialized trap at the molecular center. In addition, the energetics and spatial arrangement of these molecules allow for the destruction of multiphoton excitations at the trap, providing protection from permanent photochemical bleaching.

Original languageEnglish (US)
Pages (from-to)37-46
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
StatePublished - 1998
EventProceedings of the 1998 TAPPI Metered Size Press Forum - New Orleans, LA, USA
Duration: Apr 30 1998May 2 1998


  • Cayley tree
  • Dendrimer
  • Energy transfer
  • Perylene
  • Phenylacetylene

ASJC Scopus subject areas

  • Condensed Matter Physics


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