Triplet–Triplet Annihilation in Platinum Poly-ynes. Implications for Application to Optical Pulse Limiting
Source abstract
Abstract
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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Nonlinear Optical Materials Studies · Photochemistry and Electron Transfer Studies · Advanced Fluorescence Microscopy Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
Funding
Division of Chemistry
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