Dispersion of reduced graphene oxide in multiple solvents with an imidazolium-modified hexa-peri-hexabenzocoronene.
Dispersion of reduced graphene oxide in multiple solvents with an imidazolium-modified hexa-peri-hexabenzocoronene.
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DOI：
10.1002/asia.201200480
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
Hengxing Wei;Yingying Li;Jinping Chen;Yi Zeng;Guoqiang Yang;Yi Li
中科院分区：
文献类型：
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作者：
Hengxing Wei;Yingying Li;Jinping Chen;Yi Zeng;Guoqiang Yang;Yi Li
设计并合成了一种咪唑鎓修饰的六-正-六苯并蔻衍生物（HBC-C（11）-MIM[Cl（-）]）作为制备还原氧化石墨烯（RGO）的稳定剂。所得RGO/HBC-C（11）-MIM[Cl（-）]杂化物在水中显示出优异的分散性（5.0 mg/mL（-1））和稳定性。采用原子力显微镜、X射线衍射、X射线光电子能谱、热重分析和拉曼光谱对RGO/HBC-C（11）-MIM[Cl（-）]进行了表征，发现一个HBC-C（11）-MIM[Cl（-）]基团可以稳定石墨烯片上约178个碳原子。所得杂化膜的电导率高达286 Sm（-1）。此外，HBC-C（11）-MIM[Cl（-）]-改性的RGO片可以在亲水性Cl（-）离子交换为疏水性双（三氟甲基磺酰基）酰胺（NTf（2）（-））离子后容易地分散在极性有机溶剂中。
An imidazolium-modified hexa-peri-hexabenzocoronene derivative (HBC-C(11)-MIM[Cl(-)]) was designed and synthesized as a stabilizer to fabricate reduced graphene oxide (RGO). The resulting RGO/HBC-C(11)-MIM[Cl(-)] hybrid shows excellent dispersivity (5.0 mg mL(-1)) and stability in water. RGO/HBC-C(11)-MIM[Cl(-)] was comprehensively characterized by using atomic force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetric analysis, and Raman spectroscopy, thus revealing that one HBC-C(11)-MIM[Cl(-)] group can stabilize about 178 carbon atoms on the graphene sheets. The obtained hybrid film exhibits a high conductivity of 286 S m(-1). Furthermore, the HBC-C(11)-MIM[Cl(-)]-modified RGO sheets can be readily dispersed in polar organic solvents upon exchange of the hydrophilic Cl(-) ions for hydrophobic bis(trifluoromethylsulfonyl) amide (NTf(2)(-)) ions.