Lopes Laís C, da Silva Lidya C, Vaz Boniek G, Oliveira Alfredo R M, Oliveira Marcela M, Rocco Maria L M, Orth Elisa S, Zarbin Aldo J G
Department of Chemistry , Universidade Federal do Paraná (UFPR) , CEP 81531-980 , CP 19032 , Curitiba , PR , Brazil . Email:
Universidade Federal de Goiás , Campus Samambaia , Instituto de Química , Avenida Esperança , s/n Campus Universitário , 74690-900 , Goiânia , GO , Brazil.
Chem Sci. 2018 Aug 14;9(37):7297-7303. doi: 10.1039/c8sc02818d. eCollection 2018 Oct 7.
The largest graphene sample obtained through a chemical reaction under ambient conditions (temperature and pressure), using simple molecules such as benzene or -hexane as precursors, is reported. Starting from a heterogeneous reaction between solid iron chloride and the molecular precursor (benzene and -hexane) at a water/oil interface, graphene sheets with micrometric lateral size are obtained as a film deposited at the liquid/liquid (L/L) interface. The pathway involving the cyclization and aromatization of -hexane to benzene at the L/L interface, and the sequence of conversion of benzene to biphenyl and biphenyl to condensed rings (which originates the graphene structures) was followed by different characterization techniques and a mechanistic proposal is presented. Finally, we demonstrate that this route can be extended for the synthesis of N-doped graphene, using pyridine as the molecular precursor.
报道了在环境条件（温度和压力）下通过化学反应获得的最大石墨烯样品，该反应使用苯或正己烷等简单分子作为前驱体。从固体氯化铁与分子前驱体（苯和正己烷）在水/油界面发生的非均相反应开始，获得了具有微米级横向尺寸的石墨烯片，其以薄膜形式沉积在液/液（L/L）界面。通过不同的表征技术追踪了在L/L界面正己烷环化和芳构化生成苯的途径，以及苯转化为联苯和联苯转化为稠环（从而形成石墨烯结构）的转化顺序，并提出了一个机理建议。最后，我们证明了使用吡啶作为分子前驱体，该路线可扩展用于合成氮掺杂石墨烯。
