激进的
硝酸
化学
光热治疗
光化学
芳香性
热稳定性
光漂白
电子顺磁共振
分子
材料科学
无机化学
有机化学
纳米技术
荧光
物理
量子力学
核磁共振
作者
Zejun Wang,Jia‐wen Zhou,Yiheng Zhang,Weiya Zhu,Yuan Li
标识
DOI:10.1002/ange.202113653
摘要
Abstract It is very challenging to prepare stable radicals as they are usually thermodynamically or kinetically unstable in air. Herein, a series of star‐shaped aromatic nitric acid radicals were prepared via facile demethylation and consequent oxidation. As phenol radicals without steric hindrance group protection, they exhibit high electrochemical and thermal stability due to their rich resonance structures including closed‐shell nitro‐like and open‐shell nitroxide structure with unpaired electrons delocalized in conjugated backbones. Among them, TPA‐TPA‐O 6 powder exhibited extremely wide absorption from 300 to 2000 nm covering the whole solar spectral irradiance, high photothermal conversion efficiency, and negligible photobleaching effect in seawater desalination. Under the irradiation of one sunlight, the water evaporation efficiency of TPA‐TPA‐O 6 is recorded to be as high as 89.41 % and the water evaporation rate is 1.293 kg m −2 h −1 , which represents the top performance in pure organic small molecule photothermal materials.
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