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  • Title: Phenylene vinylene platinum(II) acetylides with prodigious two-photon absorption.
    Author: Dubinina GG, Price RS, Abboud KA, Wicks G, Wnuk P, Stepanenko Y, Drobizhev M, Rebane A, Schanze KS.
    Journal: J Am Chem Soc; 2012 Nov 28; 134(47):19346-9. PubMed ID: 23134488.
    Abstract:
    The linear and nonlinear optical properties of a series of linear and cross-conjugated platinum(II) acetylide complexes that contain extended p-(phenylene vinylene) chromophores are reported. The complexes exhibit very high femtosecond two-photon absorption (2PA) cross section values (σ(2) up to 10,000 GM), as measured by nonlinear transmission (NLT) and two-photon excited fluorescence (2PEF) methods. The large 2PA cross sections span a broad range of wavelengths, 570-810 nm, and they overlap with the triplet excited state absorption. Spectral coincidence of high cross section 2PA and triplet absorption is a key feature giving rise to efficient dual-mode optical power limiting (OPL).
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