Thermodynamic characteristics of thermal dissociation of inclusion compounds based on graphite fluorides

Ukraintseva, E. A.; Chekhova, G. N.; Pinakov, D. V.

doi:10.1007/s10973-011-1488-7

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…FGICs with acetonitrile were synthesized using a procedure described elsewhere . Natural graphite from Zavalievo deposit (Ukraine) was placed in a Teflon flask and held in the vapor over liquid Br 2 for 1 day.…”

Section: Methodsmentioning

confidence: 99%

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

Fedoseeva

Окотруб

Asanov

et al. 2014

Physica Status Solidi (b)

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Fluorinated graphite intercalation compounds (FGICs) with acetonitrile C 2 F x Á yCH 3 CN (x ¼ 0.92, 0.69, and 0.49) have been synthesized using a gaseous mixture of BrF 3 and Br 2 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 C 2 F x 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 C 2 F x intercalated with acetonitrile and NEXAFS N K-edge spectrum of C 2 F 0.69 Á 0.137CH 3 CN before and after annealing at 250 8C.

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Section: Methodsmentioning

confidence: 99%

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

Fedoseeva

Окотруб

Asanov

et al. 2014

Physica Status Solidi (b)

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“…Previously [1,[4][5][6][7], we studied in detail the properties of acetonitrile compounds based on hosts with various degrees of fluorination (x < 1.0) using differential thermal analysis (DTA); vapor pres sure measurements; and Raman, IR, and X ray pho toelectron spectroscopies. According to IR spectros copy data, which made it possible to identify two sub systems in the spectra of the compounds, guest and host, the bands the most sensitive to fluorine content among the main absorption bands of the fluorinated graphite host are those arising from C-F stretches (1126-1095 cm -1 ).…”

Section: Introductionmentioning

confidence: 99%

“…The influence of the degree of fluorination of the host on the properties of stage 1 (alternation of guest and host layers, FGIC 1) and stage 2 (alternation of two host layers and one guest layers, FGIC 2) FGICs, such as stoichiometry and thermal and thermody namic stability, was examined elsewhere [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of (C2F x Br0.01 · y CH3COOC2H5) n (0.5 < x < 1.0) intercalation compounds

2013

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We have synthesized layered inclusion (intercalation) compounds with the general formula (C 2 F x Br 0.01 ⋅ yG) n , where (C 2 F x Br 0.01 ) n is a host component, G stands for ethyl acetate (guest component), 0.5 < x < 1.0, y 1 = 0.109-0.162 (stage 1), and y 2 = 0.052-0.074 (stage 2). Using IR spectroscopy, we studied the behavior of the functional groups in the guest and host subsystems. The influence of the composition (structure) of the polymer host (C 2 F x Br 0.01 ) n on the properties of the synthesized compounds was studied using physicochemical characterization techniques (differential thermal analysis and X ray diffraction).

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“…Such step-by-step procedure allows synthesizing the compounds of graphite fluoride C 2 F with various intercalated inorganic and organic molecules. Owing to "softness" of fluorinated-graphene layers, quite large molecules can fill the space between layers, thus increasing the interlayer distance to a value of 12-16 Å [8][9][10][11][12].…”

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confidence: 99%

Nitrogen species in few-layer graphene produced by thermal exfoliation of fluorinated graphite intercalation compounds

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Fedorovskaya

Senkovskiy³

et al. 2015

Phys. Status Solidi B

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Few‐layer graphene materials have been produced by decomposition of fluorinated graphite intercalated with acetonitrile (CH3CN) or isopropylamine ((CH3)2CHNH2) in the conditions of thermal shock. Electronic structure of the samples before and after exfoliation was studied using near‐edge X‐ray absorption fine structure and X‐ray photoelectron spectroscopy. Analysis of the spectroscopic data revealed the same set of nitrogen species in both exfoliation products that indicates decomposition of the intercalated molecules to the atomic state. Most of the nitrogen atoms were incorporated at the edges of graphene layers in pyridinic and protonated nitrogen forms. A difference in the electrochemical performance of the graphene materials was related with the exfoliation degree and the defect density in the graphene layers. Schematic representation of a process of thermal exfoliation of acetonitrile‐intercalated fluorinated graphite.

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Thermodynamic characteristics of thermal dissociation of inclusion compounds based on graphite fluorides

Cited by 7 publications

References 10 publications

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

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

Synthesis and properties of (C2F x Br0.01 · y CH3COOC2H5) n (0.5 < x < 1.0) intercalation compounds

Nitrogen species in few-layer graphene produced by thermal exfoliation of fluorinated graphite intercalation compounds

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