Issue 22, 2023

Centripetal triazine chromophores: towards efficient two-photon absorbers and highly emissive polyimide films

Abstract

Four centripetal (D–π–)3–A chromophores based on s-triazine central acceptors and three amino donor-terminated branches were prepared. These chromophores were proved to be thermally stable up to 300 °C with a tuneable HOMO–LUMO gap (3.02–2.51 eV) and longest-wavelength absorption/emission maxima within the range of 390–427/485–551 nm. Relatively large Stokes shift up to 8000 cm−1, quantum yields up to 78% and fluorescence lifetimes ranging between 2 and 4 ns were observed based on the chromophore structure and the used environment. In general, varying the π-linker is proved to be a very useful strategy to tune the fundamental properties of these chromophores. Two-photon absorption measurements showed good to excellent cross-sections reaching 1000 GM. High-quality and well-transparent polyimide films doped with chromophores (0.1%) were further prepared, and showed bright emission in blue and yellow/green regions.

Graphical abstract: Centripetal triazine chromophores: towards efficient two-photon absorbers and highly emissive polyimide films

Supplementary files

Article information

Article type
Paper
Submitted
10 Mar 2023
Accepted
10 May 2023
First published
10 May 2023
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2023,11, 7252-7261

Centripetal triazine chromophores: towards efficient two-photon absorbers and highly emissive polyimide films

P. Šimon, M. Klikar, Z. Burešová, C. Vourdaki, A. Katsidas, J. Tydlitát, J. Kulhánek, J. Zelenka, M. Fakis and F. Bureš, J. Mater. Chem. C, 2023, 11, 7252 DOI: 10.1039/D3TC00877K

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