Issue 11, 2022

Ultrastable radicals in naphthalenediimide-based materials and their stimulus-boosting near-infrared photothermal conversion

Abstract

Persistent stable radical-doped characteristic of naphthalenediimide-based crystalline materials under ambient conditions, even bearing 300 °C high temperature treatment, was studied by UV-Vis-NIR absorption spectroscopy, electron paramagnetic resonance (EPR) spectroscopy and powder X-ray diffraction (PXRD) analyses. On exposure to additional visible light or after-heat treatments, more ultrastable organic radicals can be sharply formed due to the strong and intrinsic electron transfer interactions in the crystalline materials. The significant near-infrared photothermal conversion was directly achieved in these radical-doped crystalline materials without extra chemical modification or photochemical means; furthermore, it can be effectively enhanced by further photo-induction and thermal-activation processes.

Graphical abstract: Ultrastable radicals in naphthalenediimide-based materials and their stimulus-boosting near-infrared photothermal conversion

Supplementary files

Article information

Article type
Research Article
Submitted
17 Feb 2022
Accepted
01 Apr 2022
First published
05 Apr 2022

Inorg. Chem. Front., 2022,9, 2568-2574

Ultrastable radicals in naphthalenediimide-based materials and their stimulus-boosting near-infrared photothermal conversion

H. Ke, X. Zhu, S. Xie, P. Ming and J. Liao, Inorg. Chem. Front., 2022, 9, 2568 DOI: 10.1039/D2QI00361A

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