Chemical Bonding of Partially Fluorinated Graphene

被引：94
作者：
Zhou, Si [1 ,2 ]
Sherpa, Sonam D. [3 ]
Hess, Dennis W. [3 ]
Bongiorno, Angelo [1 ,2 ]
机构：
[1] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[2] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
[3] Georgia Inst Technol, Sch Chem & Biochem Engn, Atlanta, GA 30332 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 45期
基金：
美国国家科学基金会;
关键词：
GRAPHITE INTERCALATION COMPOUNDS; DENSITY-FUNCTIONAL THEORY; X-RAY PHOTOELECTRON; STRUCTURAL MODELS; FLUORIDE; XPS; SURFACE; PSEUDOPOTENTIALS;
D O I：
10.1021/jp508965q
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Understanding the interactions of graphene and chemical additives is crucial to achieve control over chemically modified graphene materials. Here, density functional theory and experiments are used to elucidate the chemical bonding of partially fluorinated graphene. This material includes FC bonds whose ionicity varies depending upon local concentration and structure. Three bonding states dominate. Single fluorine on graphene forms a semi-ionic bond with a C atom in an sp(2) configuration. Fluorine in highly stable domains of poly(carbon fluoride) consists of covalent FC bonds alternating in ortho position one to another on both sides of graphene. Fluorine in regions of poly(tetracarbon fluoride) has F species on one side of graphene in para position one to another, and FC bonds with a character intermediate between the semi-ionic and covalent. Such variability in chemical bonding could be exploited to tailor fluorinated graphene materials to achieve a variety of properties.
引用
收藏
页码：26402 / 26408
页数：7
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