Formation and Isolation of a Four-Electron-Reduced Porphyrin Derivative by Reduction of a Stable 20π Isophlorin
Formation and Isolation of a Four-Electron-Reduced Porphyrin Derivative by Reduction of a Stable 20π Isophlorin
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通过稳定的 20π 异佛啉还原形成和分离四电子还原卟啉衍生物
DOI：
10.1002/anie.201711058
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Takahiko Kojima
中科院分区：
文献类型：
--
作者：
4.Wataru Suzuki;Hiroaki Kotani;Tomoya Ishizuka;Yoshihito Shiota;Kazunari Yoshiza;Takahiko Kojima
Na2S2O4 对二质子化的十二苯基卟啉衍生物进行双电子还原，选择性地产生相应的异佛啉 (Iph)。通过光谱测量和四甲基化Iph的分离证实了Iph的形成。 Iph进一步还原形成前所未有的四电子还原卟啉（IphH2），通过光谱和X射线晶体学分析对其进行了充分表征。IphH2具有独特的构象，可以被氧化以再现起始卟啉，从而形成质子耦合的四电子可逆氧化还原系统。
The two‐electron reduction of a diprotonated dodecaphenylporphyrin derivative by Na2S2O4gave a corresponding isophlorin (Iph) selectively. Formation ofIphwas confirmed by spectroscopic measurements and the isolation of tetramethylatedIph. Further reduction ofIphproceeded to form an unprecedented four‐electron‐reduced porphyrin (IphH2), which was fully characterized by spectroscopic and X‐ray crystallographic analysis.IphH2, with a unique conformation, could be oxidized to reproduce the starting porphyrin, resulting in a proton‐coupled four‐electron reversible redox system.