Modified p-phenylene vinylene platinum (II) acetylides with enhanced  two-photon absorption in solid host

Galyna G. Dubinina; Randi S. Price; Geoffrey Wicks; Pawel Wnuk; Yuriy Stepanenko; Mikhail Drobizhev; Aleksander Rebane; Kirk S. Schanze

doi:10.1117/12.2004180

6 March 2013 Modified p-phenylene vinylene platinum (II) acetylides with enhanced two-photon absorption in solid host

Galyna G. Dubinina, Randi S. Price, Geoffrey Wicks, Pawel Wnuk, Yuriy Stepanenko, Mikhail Drobizhev, Aleksander Rebane, Kirk S. Schanze

Author Affiliations +

Proceedings Volume 8622, Organic Photonic Materials and Devices XV; 86220I (2013) https://doi.org/10.1117/12.2004180
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

Organometallic complexes comprising of a platinum (II) acetylide core linked with different -conjugated chromophores are promising materials for applications requiring strong nonlinear-optical response. In dual-mode optical power limiting, the chromophore first undergoes ultrafast two-photon absorption (2PA) in singlet manifold, followed by efficient intersystem crossing (ISC) and subsequent T-T absorption. While the heavy atom facilitates efficient T-T absorption, achieving sufficiently high intrinsic 2PA cross-section value has remained an issue. Here we present a series of linear- and cross-conjugated p-phenylene vinylene platinum (II) acetylides (TPV1-Ph, TP01-TPV2, crossTPV1, crossTPV1-DPAF, crossTPV3) with extended π-conjugated chains and discuss their linear- and nonlinear photophysical properties, including comparison to the properties of the constituting ligand chromophores. Remarkably high femtosecond 2PA cross-section values (up to 10,000 GM) were obtained for several of the new complexes by both nonlinear transmission (NLT) and two-photon excited fluorescence (2PEF) method. The large 2PA values, especially in crossTPV1 and crossTPV3, span a broad range of wavelengths, 570 – 810 nm, which overlaps with maximum wavelength of strong T-T excited state absorption measured by nanosecond transient absorption method. This combination of properties renders these compounds efficient dual-mode nonlinear absorbers in the visible to near-IR region. Examination of the photophysical properties allows us to elucidate the structure-property relationships both in the solutions as well as in solid samples where the chromophores are incorporated into a polymer host.

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Galyna G. Dubinina, Randi S. Price, Geoffrey Wicks, Pawel Wnuk, Yuriy Stepanenko, Mikhail Drobizhev, Aleksander Rebane, and Kirk S. Schanze "Modified p-phenylene vinylene platinum (II) acetylides with enhanced two-photon absorption in solid host", Proc. SPIE 8622, Organic Photonic Materials and Devices XV, 86220I (6 March 2013); https://doi.org/10.1117/12.2004180

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