Fluorescence resonance energy transfer in novel multiphoton absorbing dendritic structures

Darryl W. Brousmiche, Jason M. Serin, Jean M.J. Fréchet, Guang S. He, Tzu Chau Lin, Sung Jae Chung, Paras N. Prasad, Ramamurthi Kannan, Loon Seng Tan

Research output: Contribution to journalArticlepeer-review

87 Scopus citations


A series of small dendritic structures containing one of two efficient multiphoton absorbing dyes at the periphery and a nile red derivative at the core have been synthesized. These molecules display efficient (>96%) fluorescence resonance energy transfer (FRET) from the periphery to the core on selective excitation of the two-photon absorbing chromophore by either UV (linear absorption) or high-intensity IR (nonlinear absorption) radiation. In addition, a significant increase in core emission is observed on excitation of the peripheral chromophores, compared to direct excitation of the core. This "antenna effect" essentially doubles between increasing dendrimer generations within a series. The combination of the ability of the peripheral chromophores to absorb high-intensity IR radiation, coupled with a very efficient energy transfer process and a significant increase in the fluorescence of the acceptor chromophore, makes these molecules potentially useful for a variety of applications, including optical power limiting and biomedical imaging.

Original languageEnglish (US)
Pages (from-to)8592-8600
Number of pages9
JournalJournal of Physical Chemistry B
Issue number25
StatePublished - Jun 24 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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