Radical Mechanism for the Reduction of Graphene Derivatives Initiated by Electron-Transfer Reactions
Radical Mechanism for the Reduction of Graphene Derivatives Initiated by Electron-Transfer Reactions
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DOI：
10.1021/acs.jpcc.8b01941
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发表时间：
2018-03
影响因子：
3.7
通讯作者：
Wenchuan Lai;Zaoming Wang;Yulong Li;Xu Wang-;Yang Liu;Xiangyang Liu
中科院分区：
文献类型：
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作者：
Wenchuan Lai;Zaoming Wang;Yulong Li;Xu Wang-;Yang Liu;Xiangyang Liu
本研究创新性地采用电子顺磁共振（EPR）技术揭示了石墨烯衍生物化学还原的特殊机理。通过EPR方法检测氧化石墨烯的还原反应过程中自由基中间体和自由基中心的变化，发现氧化石墨烯的还原反应是以电子转移和脱氧反应组成的自由基机理进行的。对氟化石墨烯的进一步研究也表明，石墨烯衍生物的还原反应往往涉及ET反应引发的自由基过程。自由基机制被进一步强调为石墨烯化学的典型特征。
Electron paramagnetic resonance (EPR) spectroscopy was innovatively employed to reveal the particular mechanism for chemical reduction of graphene derivatives in this work. It was found that reduction of graphene oxide can occur in a radical mechanism consisted of the electron transfer (ET) and deoxygenation reaction, which was proved by detecting the relevant radical intermediates and change of radical centers on graphene nanosheet during reactions via EPR method. Further researches of fluorinated graphene also indicated that reduction of graphene derivatives was always involved with radical process initiated by ET reaction. The radical mechanism is further emphasized as the typical characteristic of the graphene chemistry.