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Proceedings Paper

Ultrafast transient absorption spectroscopic studies of new dumbbell-shaped platinum (Pt) systems composed of "weight" and "bar" chromophores
Author(s): Runhui Liang; Wenjuan Xiong; Lili Du; David Lee Phillips
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Paper 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 PtII-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.

Paper Details

Date Published: 27 February 2020
PDF: 10 pages
Proc. SPIE 11278, Ultrafast Phenomena and Nanophotonics XXIV, 112780A (27 February 2020); doi: 10.1117/12.2545397
Show Author Affiliations
Runhui Liang, The Univ. of Hong Kong (Hong Kong, China)
Wenjuan Xiong, The Univ. of Hong Kong (Hong Kong, China)
Lili Du, The Univ. of Hong Kong (Hong Kong, China)
Jiangsu Univ. (China)
David Lee Phillips, The Univ. of Hong Kong (Hong Kong, China)

Published in SPIE Proceedings Vol. 11278:
Ultrafast Phenomena and Nanophotonics XXIV
Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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