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A nonconjugated radical polymer with stable red luminescence in the solid state.
- Source :
-
Materials horizons [Mater Horiz] 2022 Oct 03; Vol. 9 (10), pp. 2564-2571. Date of Electronic Publication: 2022 Oct 03. - Publication Year :
- 2022
-
Abstract
- Organic radicals are unstable and stable radicals usually display non-luminescent properties. Luminescent radicals possess the all-in-one properties of optoelectronics, electronics, and magnetics. To date, the reported structures of luminescent radicals are limited to triphenylmethyl radical derivatives and their analogues, which are stabilized with extended π-conjugation. Here, we demonstrate the first example of a nonconjugated luminescent radical. In spite of the lack of delocalized π-stabilization, the radical polymer readily emits red luminescence in the solid state. A traditional luminescent quencher, 2,2,6,6-tetramethylpiperidin-1-yl turned into a red chromophore when grafted onto a polymer backbone. Experimental data confirm that the emission is associated with the nitroxide radicals and is also affected by the packing of the polymer. This work discloses a novel class of luminescent radicals and a distinctive pathway for luminescence from open-shell materials.
- Subjects :
- Luminescence
Polymers chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 2051-6355
- Volume :
- 9
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Materials horizons
- Publication Type :
- Academic Journal
- Accession number :
- 35880529
- Full Text :
- https://doi.org/10.1039/d2mh00808d