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Lookup NU author(s): Emeritus Professor Anthony Harriman,
Dr Guillaume Izzet
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Three new molecular dyads, comprising a bora-3a,4a-diaza-s-indacene (Bodipy) dye linked to two aromatic polycycles via the boron center, have been synthesized and fully characterized. The polycyclic compounds are either pyrene or perylene, or a mixture of both. Whereas the absorption spectral profiles contain important contributions from each of the subunits, fluorescence occurs exclusively from the Bodipy fragment. Intramolecular excitation energy transfer is extremely efficient in each case, even though spectral overlap integrals for the pyrene-based system are modest. Although these polycycles are sterically congested, molecular dynamics simulations indicate that they are in dynamic motion, and this hinders proper computation of the orientation factors for Förster-type energy transfer. These new dyes, especially the mixed polycycle system, greatly extend the range of excitation wavelengths that can be used for fluorescence microscopy. © 2006 American Chemical Society.
Author(s): Harriman A, Izzet G, Ziessel R
Publication type: Article
Publication status: Published
Journal: Journal of the American Chemical Society
ISSN (print): 0002-7863
ISSN (electronic): 1943-2984
Publisher: American Chemical Society
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