Nor[7]circulenyl Neutral Radical and Its Charged Species: Synthesis, Structures, and Efficient NIR‐II Photothermal Conversion for Imaging and Laser Ignition
Abstract
Abstract [ n ]Circulenes have attracted considerable research interest; however, open‐shell [ n ]circulene‐type structures remain elusive. In this study, we report the synthesis of a highly stable nor[7]circulenyl radical (nor[7]CR) and its isolation in the crystalline phase. nor[7]CR exhibits a distinct four‐stage amphoteric redox behavior, as revealed by cyclic voltammetry. The stable cation (nor[7]CR + ) was obtained via chemical oxidation and isolated in crystalline form, and the corresponding anionic species were characterized spectroscopically. Remarkably, nor[7]CR + exhibits strong NIR‐II absorption at 1105 nm with a high photothermal conversion efficiency (PCE) of 93%, as well as a high maximum photothermal temperature ( T max ) under low optical power density. The applications of nor[7]CR + in photothermal imaging and laser ignition were demonstrated, highlighting its great potential as a photothermal material.
Article Details
Authors (5)
Xiaoqi Tian
Institute of Molecular Plus, Department of Chemistry, Tianjin University and Haihe Laboratory of Sustainable Chemical Transformations, 92 Weijin Road, Tianjin 300072, China
Mingzhe Wang
Department of Chemistry, Tianjin University and Haihe Laboratory of Sustainable Chemical Transformations, Institute of Molecular Plus, 92 Weijin Road, Tianjin 300072, China
Xiaonan Ma
Institute of Molecular Plus
Sota Sato
Department of Applied Chemistry, School of Engineering, The University of Tokyo FS CREATION, 6-6-2 Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan
Zhe Sun