Abstract

Stable radicals in organic conjugated molecules are of great interest due to their magnetic signals and broad optical absorptions. In this paper, we report on naphthalene, benzoperylene, perylene, terrylene, and quaterrylene carboximides, reduced under controlled conditions, where stable metal-free solid salts of radical anions could be obtained forming darkly colored solutions with line-rich UV/Vis/NIR spectra and exhibiting special magnetic properties. The most bathochromic shift of the absorption maxima extend from 760 until 1700 nm. Persistent paramagnetic properties of the solids were observed and temperature-dependent susceptibilities are measured.

Graphical abstract

中文翻译：

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peri-arylene 系列中的持久自由基阴离子：直到远在 NIR 中的宽带光吸收和纯有机磁性。

摘要

有机共轭分子中的稳定自由基因其磁信号和广泛的光吸收而备受关注。在本文中，我们报道了在受控条件下还原的萘、苯并苝、苝、三萘嵌苯和四萘嵌苯甲酰亚胺，在这些化合物中，可以获得稳定的自由基阴离子的无金属固体盐，形成具有丰富谱线的 UV/Vis/NIR 的深色溶液光谱并表现出特殊的磁性。吸收最大值的最红移从 760 延伸到 1700 nm。观察到固体的持久顺磁性，并测量了与温度相关的磁化率。

图形概要