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Triplet–Triplet Annihilation in Platinum Poly-ynes. Implications for Application to Optical Pulse Limiting AITranslate

Ru He; Charles J. Zeman; IV; Rajendra Acharya; Kirk S. Schanze
The University of Texas at San Antonio; The University of Texas at San Antonio; The University of Texas at San Antonio; The University of Texas at San Antonio
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Publisher: ACS
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Abstract AITranslate

Platinum(II) poly-ynes, [-trans-Pt(PBu3)2-CC-Ph-CC-]n (Poly-Pt-n, n = 13, 57, and 183), display 10-fold lower transient absorption (TA) due to the triplet excited state compared to a molecular complex (Pt-2) with the same structure as the polymer repeat unit. Power-dependent transient absorption and phosphorescence studies carried out with dilute solutions of Poly-Pt-n and Pt-2 reveal that the diminished transient absorption in the polymers is due to intrachain triplet–triplet annihilation (t-tA) on polymer chains that feature two or more triplet excitons. Monte Carlo dynamics simulations suggest that the t-tA occurs as a result of rapid exciton migration along the Pt poly-yne chains.

KeyWords AITranslate

platinum polyyne nonlinear absorption triplet state optical limiting triplet−triplet annihilation transient absorption triplet Show More
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Basic Information:

DOI：https://doi.org/10.1021/acsapm.1c01832

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Citation Information:

Platinum(II) poly-ynes, [-trans-Pt(PBu3)2-CC-Ph-CC-]n (Poly-Pt-n, n = 13, 57, and 183), display 10-fold lower transient absorption (TA) due to the triplet excited state compared to a molecular complex (Pt-2) with the same structure as the polymer repeat unit. Power-dependent transient absorption and phosphorescence studies carried out with dilute solutions of Poly-Pt-n and Pt-2 reveal that the diminished transient absorption in the polymers is due to intrachain triplet–triplet annihilation (t-tA) on polymer chains that feature two or more triplet excitons. Monte Carlo dynamics simulations suggest that the t-tA occurs as a result of rapid exciton migration along the Pt poly-yne chains.

quote

GB/T 7714-2015 [1] Ru He, Charles J. Zeman, IV, Rajendra Acharya, et al. ACS Applied Polymer Materials, 2022(4). DOI:10.1021/acsapm.1c01832.
MLA [1] Ru He, et al., ACS Applied Polymer Materials, no. 4, 2022, https://doi.org/10.1021/acsapm.1c01832.
APA [1] Ru He, Charles J. Zeman, IV, Rajendra Acharya, & Kirk S. Schanze. (2022). ACS Applied Polymer Materials(4). https://doi.org/10.1021/acsapm.1c01832
IEEE [1] Ru He, Charles J. Zeman, IV, Rajendra Acharya, and Kirk S. Schanze, ACS Applied Polymer Materials, no. 4, 2022, doi: 10.1021/acsapm.1c01832. keywords: {platinum polyyne;nonlinear absorption;triplet state;optical limiting;triplet−triplet annihilation;transient absorption;triplet;Show More}