Ultrafast transient absorption spectroscopic studies of new dumbbell-shaped platinum (Pt) systems composed of "weight" and "bar" chromophores

Runhui Liang; Wenjuan Xiong; Lili Du; David Lee Phillips

doi:10.1117/12.2545397

27 February 2020 Ultrafast transient absorption spectroscopic studies of new dumbbell-shaped platinum (Pt) systems composed of "weight" and "bar" chromophores

Runhui Liang, Wenjuan Xiong, Lili Du, David Lee Phillips

Author Affiliations +

Proceedings Volume 11278, Ultrafast Phenomena and Nanophotonics XXIV; 112780A (2020) https://doi.org/10.1117/12.2545397
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Dumbbell-shaped metal complexes have received great attention in material science and chemistry because of their high ISC quantum yield and relatively long-lived triplet excited states. However, the working mechanism of the “weight” and “bar” moieties are unclear and vary with structure. In this paper, a novel dumbbell-shaped platinum complex (weight) connecting with TPE (bar) was synthesized and studied by employing time-resolved spectroscopy methods. In this system, the platinum complex, is designed to interfere with the rotation of TPE by Pt•••Pt and π−π stacking interactions, and these interactions also serve as a spin convertor to facilitate the ISC process. A N^C^N Pt^II-TPE decolorized triplet excited state was successfully detected by transient absorption spectroscopy for the first time and a room-temperature phosphorescence with a lifetime around 1404 ns was also observed.

Citation Download Citation

Runhui Liang, Wenjuan Xiong, Lili Du, and David Lee Phillips "Ultrafast transient absorption spectroscopic studies of new dumbbell-shaped platinum (Pt) systems composed of "weight" and "bar" chromophores", Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780A (27 February 2020); https://doi.org/10.1117/12.2545397

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