ArticleiScience2022
Elucidating complex triplet-state dynamics in the model system isopropylthioxanthone.
Article in iScience, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Triplet Energy Transfer Strategy for Visible Light Activation of Bio-Based Oxime Esters in Photopolymerization and 3D Printing.Small (Weinheim an der Bergstrasse, Germany) · 2026Article
- Stimulated Emission Depletion Inspired Sub-100 nm Structuring of Epoxides Using 2-Chlorothioxanthone as Photosensitizer.ACS omega · 2024Article
- Article
- STED-Inspired Cationic Photoinhibition Lithography.The journal of physical chemistry. C, Nanomaterials and interfaces · 2023Article
- Low-Fluorescence Starter for Optical 3D Lithography of Sub-40 nm Structures.ACS applied optical materials · 2023Article
- Photo-activated polymerization inhibition process in photoinitiator systems for high-throughput 3D nanoprinting.Nanophotonics (Berlin, Germany) · 2023Article
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Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We introduce techniques for probing the dynamics of triplet states. We employ these tools, along with conventional techniques, to develop a detailed understanding of a complex chemical system: a negative-tone, radical photoresist for multiphoton absorption polymerization in which isopropylthioxanthone (ITX) is the photoinitiator. This work reveals that the same color of light used for the 2-photon excitation of ITX, leading to population of the triplet manifold through intersystem crossing, also depletes this triplet population via linear absorption followed by reverse intersystem crossing (RISC). Using spectroscopic tools and kinetic modeling, we identify the reactive triplet state and a non-reactive reservoir triplet state. We present compelling evidence that the deactivation channel involves RISC from an excited triplet state to a highly vibrationally excited level of the electronic ground state. The work described here offers the enticing possibility of understanding, and ultimately controlling, the photochemistry and photophysics of a broad range of triplet processes.
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Registered trials
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