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Stable radical anions generated from a porous perylenediimide metal-organic framework for boosting near-infrared photothermal conversion.
Nature Communications ( IF 14.7 ) Pub Date : 2019-02-15 , DOI: 10.1038/s41467-019-08434-4
Baozhong Lü 1 , Yifa Chen 2 , Pengyu Li 1 , Bo Wang 2 , Klaus Müllen 3 , Meizhen Yin 1
Affiliation  

Radical anions of electron-deficient systems are widely used, but are easily reoxidized upon exposure to air. Therefore, the stabilization of radical anions under ambient conditions is of great significance, but still remains a scientific challenge. Herein, perylenediimide is employed to prepare a crystalline metal-organic framework for stabilizing radical anions without extensive chemical modification. The porous, three-dimensional framework of perylenediimide can trap electron donors such as amine vapors and produce radical anions in-situ through photo-induced electron transfer. The radical anions are protected against quenching by shielding effect in air and remain unobstructed in air for at least a month. Because of the high yield and stability of the radical anions, which are the basis for near-infrared photothermal conversion, the framework shows high near-infrared photothermal conversion efficiency (η = 52.3%). The work provides an efficient and simple method towards ambient stable radical anions and affords a promising material for photothermal therapy.

中文翻译:

由多孔苝二酰亚胺金属有机框架产生的稳定自由基阴离子,用于促进近红外光热转换。

缺电子体系的自由基阴离子被广泛使用,但暴露在空气中后很容易被再氧化。因此,自由基阴离子在环境条件下的稳定具有重要意义,但仍然是一个科学挑战。在此,苝二酰亚胺用于制备用于稳定自由基阴离子的结晶金属有机骨架,而无需大量化学修饰。苝二酰亚胺的多孔三维框架可以捕获胺蒸气等电子供体,并通过光诱导电子转移原位产生自由基阴离子。自由基阴离子通过空气中的屏蔽效应防止猝灭,并在空气中不受阻碍地保持至少一个月。由于作为近红外光热转换基础的自由基阴离子的高产率和稳定性,该框架显示出高近红外光热转换效率(η = 52.3%)。这项工作提供了一种有效且简单的方法来获取环境稳定的自由基阴离子,并为光热疗法提供了一种有前途的材料。
更新日期:2019-02-15
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