Record Multiphoton Absorption Cross-Sections by Dendrimer Organometalation

Angewandte Chemie
Peter V SimpsonMark G Humphrey

Abstract

Large increases in molecular two-photon absorption, the onset of measurable molecular three-photon absorption, and record molecular four-photon absorption in organic π-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 π-framework is maintained when the relevant parameters are scaled by molecular weights or number of delocalizable π-electrons. The four-photon absorption cross-section of the most metal-rich dendrimer is an order of magnitude greater than the previous record value.

References

Oct 11, 2001·Journal of the American Chemical Society·B R ChoM Cho
Sep 30, 2004·Journal of the American Chemical Society·Clem E PowellMark G Humphrey
Oct 22, 2004·Applied Optics·Florencio E HernándezKatherine J Schafer
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Apr 24, 2012·Journal of the American Chemical Society·Hai Hua FanKok Wai Cheah

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Citations

May 11, 2017·Chemistry : a European Journal·Torsten SchwichMark G Humphrey
Jun 15, 2016·Chemical Communications : Chem Comm·Beibei GaoMark G Humphrey
Mar 8, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Jun DuMark G Humphrey
Mar 24, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Mahesh S KodikaraMark G Humphrey
Jul 26, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Areej MerhiChristine O Paul-Roth
Sep 8, 2018·Chemistry : a European Journal·Mahbod MorshediMark G Humphrey
Dec 19, 2020·The Journal of Physical Chemistry. a·Luca RavottoSergei A Vinogradov
Jan 9, 2019·Nano Letters·Cristóbal QuintanaMark G Humphrey

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