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    Record Multiphoton Absorption Cross-Sections by Dendrimer Organometalation

    Access Status
    Fulltext not available
    Authors
    Simpson, Peter
    Watson, L.
    Barlow, A.
    Wang, G.
    Cifuentes, M.
    Humphrey, M.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Simpson, P. and Watson, L. and Barlow, A. and Wang, G. and Cifuentes, M. and Humphrey, M. 2016. Record Multiphoton Absorption Cross-Sections by Dendrimer Organometalation. Angewandte Chemie: International Edition. 55 (7): pp. 2387-2391.
    Source Title
    Angew Chem Int Ed Engl
    DOI
    10.1002/anie.201509223
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/39360
    Collection
    • Curtin Research Publications
    Abstract

    Large increases in molecular two-photon absorption, the onset of measurable molecular three-photon absorption, and record molecular four-photon absorption in organic p-delocalizable frameworks are achieved by incorporation of bis(diphosphine)ruthenium units with alkynyl linkages. The resultant ruthenium alkynyl-containing dendrimers exhibit strong multiphoton absorption activity through the biological and telecommunications windows in the near-infrared region. The ligated ruthenium units significantly enhance solubility and introduce fully reversible redox switchability to the optical properties. Increasing the ruthenium content leads to substantial increases in multiphoton absorption properties without any loss of optical transparency. This significant improvement in multiphoton absorption performance by incorporation of the organometallic units into the organic p-framework is maintained when the relevant parameters are scaled by molecular weights or number of delocalizable p-electrons. The four-photon absorption cross-section of the most metal-rich dendrimer is an order of magnitude greater than the previous record value.

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