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首页> 外文期刊>RSC Advances >UV-vis and EPR spectroelectrochemical investigations of triarylamine functionalized arylene bisimides
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UV-vis and EPR spectroelectrochemical investigations of triarylamine functionalized arylene bisimides

机译：三芳基胺官能化亚胺双酰亚胺的UV-Vis和EPR光谱电化学研究

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Four arylene bisimides N-substituted with triarylamine and three bisimides core-functionalized with the same substituent were studied by cyclic voltammetry, UV-vis and EPR spectroelectrochemistry. All the investigated compounds showed ambipolar behaviour manifested by their quasi-reversible reduction to radical anions and quasi-reversible oxidation to radical cations. The presence of stable radical anions and radical cations was confirmed by EPR spectroelectrochemical experiments. Formation of the radical anions resulted in bleaching of the bisimide UV-vis bands with simultaneous hypsochromic shift of the charge transfer (CT) band and appearance of the radical anion peaks, the bands originating from the triarylamine remaining essentially unchanged. Electrochemical generation of radical cations resulted in turn in bleaching of the triarylamine band accompanied by a hypsochromic shift of the CT band and with the appearance of the radical cation bands at higher wavelengths, the bisimide bands remained essentially intact.
机译：四个亚芳双酰亚胺的N-取代的三芳基胺与和三个双酰亚胺芯官能化的具有相同的取代基通过循环伏安法，UV-vis和EPR光谱电化学研究。所有研究的化合物显示出通过准可逆还原成自由基阴离子和准可逆氧化成自由基阳离子表现双极行为。稳定的自由基阴离子和自由基阳离子的存在是通过EPR光谱电化学实验所证实。自由基阴离子的形成导致具有电荷转移（CT）频带的同时蓝移和自由基阴离子峰的外观的双酰亚胺的UV-vis频带的漂白，从三芳基胺的频带始发基本上保持不变。电化学产生自由基阳离子的导致反过来在伴随CT带的蓝移和在较高波长下的自由基阳离子条带的出现的三芳基胺频带的漂白，将双酰亚胺带基本上保持完好。

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