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首页> 外文期刊>Polyhedron: The International Journal for Inorganic and Organometallic Chemistry >Redox-switching of intramolecular magnetic interaction through π-conjugation mode change of 1,2-bis(4-dianisylamino)-1,2-bis(3-N-oxylamino)- substituted tetraarylethylene
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Redox-switching of intramolecular magnetic interaction through π-conjugation mode change of 1,2-bis(4-dianisylamino)-1,2-bis(3-N-oxylamino)- substituted tetraarylethylene

机译:通过1,2-双(4-二苯胺基氨基)-1,2-双(3-N-氧基氨基)-取代的四芳基乙烯的π-共轭模式改变来进行分子内磁相互作用的氧化还原转换

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摘要

To develop the redox-switching system of intramolecular magnetic interaction, 1,2-bis[3-(N-tert-butyl-N-oxylamino)phenyl]-1,2-bis[4-{N,N-bis(4- methoxyphenyl)amino}phenyl]ethylene, tetraarylethylene with two nitroxide radical groups at the meta-position, was synthesized, and characterized by the electrochemical method and ESR spectroscopy. Cyclic voltammetry showed the tetraarylethylene core has the lower oxidation potential than the substituted nitroxide radical moiety. ESR spectroscopy in frozen solution revealed that the neutral form shows the fine-structured spectrum characteristic of the spin triplet species, while the dicationic form shows the anisotropic hyperfine-structured spectrum characteristic of the randomly-oriented nitroxide radical, indicating the drastic change of intramolecular magnetic interaction.
机译:要开发分子内磁相互作用的氧化还原转换系统,1,2-双[3-(N-叔丁基-N-羟氨基)苯基] -1,2-双[4- {N,N-bis(4合成了在间位具有两个氮氧自由基的-甲氧基苯基)氨基}苯基]乙烯,四芳基乙烯,并通过电化学方法和ESR光谱对其进行了表征。循环伏安法表明,四芳基乙烯核的氧化电势比取代的硝基氧自由基部分低。冷冻溶液中的ESR光谱显示,中性形式显示自旋三重态物种的精细结构光谱特征,而双极性形式显示随机取向的氮氧自由基的各向异性超精细结构光谱特征,表明分子内磁性的剧烈变化相互作用。

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