Nitrogen inserting in fluorinated graphene via annealing of acetonitrile intercalated graphite fluoride

• Published in: Physica Status Solidi. B: Basic Solid State Physics 2014-12, Vol.251 (12), p.2530-2535
• Main Authors: Fedoseeva, Yu. V., Okotrub, A. V., Asanov, I. P., Pinakov, D. V., Chekhova, G. N., Tur, V. A., Plyusnin, P. E., Vyalikh, D. V., Bulusheva, L. G.
• Format: Article
• Language: English
• Subjects: Acetonitrile; Annealing; Fluorides; fluorinated graphite intercalation compounds; Fluorination; Graphene; Graphite; heating; NEXAFS; NEXAFS, XPS; Spectra; X-rays; XPS
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.201451281

Fluorinated graphite intercalation compounds (FGICs) with acetonitrile C2Fx · yCH3CN (x = 0.92, 0.69, and 0.49) have been synthesized using a gaseous mixture of BrF3 and Br2 at room temperature and subsequent replacement of the reaction medium components on acetonitrile by isopiestic method. The change in functional composition and electronic structure of FGICs under annealing at 250–260 °C was studied by infrared, X‐ray photoelectron, and near‐edge X‐ray absorption fine structure spectroscopy (NEXAFS) methods. Analysis of the data revealed interaction of acetonitrile with a C2Fx matrix. The X‐ray spectra detected formation of new nitrogen species attributed to two‐coordinated and mono hydrogenated three‐coordinated atoms. Mechanism of nitrogen incorporation in the fluorinated graphene layers was proposed. Schematic structure of graphite fluoride C2Fx intercalated with acetonitrile and NEXAFS N K‐edge spectrum of C2F0.69 · 0.137CH3CN before and after annealing at 250 °C.