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Issue 5, 2013
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“Push-no-pull” porphyrins for second harmonic generation imaging

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The established approach to design a molecule with strong second-order nonlinear optical (NLO) activity is to connect an electron-donor to an electron-acceptor via a π-conjugated bridge, to generate push–pull system. Surprisingly, we have found that dyes with large first hyperpolarizabilities, and which exhibit strong second harmonic generation (SHG), can be created just by attaching an electron-donor to a porphyrin. The free-base porphyrin core is sufficiently electron-deficient that the hyperpolarizability does not increase on addition of a pyridinium electron-acceptor.

Graphical abstract: “Push-no-pull” porphyrins for second harmonic generation imaging

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The article was received on 21 Dec 2012, accepted on 01 Mar 2013 and first published on 04 Mar 2013

Article type: Edge Article
DOI: 10.1039/C3SC22306J
Citation: Chem. Sci., 2013,4, 2024-2027
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    “Push-no-pull” porphyrins for second harmonic generation imaging

    I. López-Duarte, J. E. Reeve, J. Pérez-Moreno, I. Boczarow, G. Depotter, J. Fleischhauer, K. Clays and H. L. Anderson, Chem. Sci., 2013, 4, 2024
    DOI: 10.1039/C3SC22306J

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