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Graphite intercalation compounds con...

Katinonkul, Watcharee.

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Graphite intercalation compounds containing fluoroanions.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Graphite intercalation compounds containing fluoroanions./
Author:	Katinonkul, Watcharee.
Description:	168 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6656.
Contained By:	Dissertation Abstracts International68-10B.
Subject:	Chemistry, General. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3286045
ISBN:	9780549284611

Graphite intercalation compounds containing fluoroanions.
Katinonkul, Watcharee.

Graphite intercalation compounds containing fluoroanions. - 168 p.

Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6656.

Thesis (Ph.D.)--Oregon State University, 2007.

New chemical synthesis strategies have been investigated for the preparation of acceptor-type graphite intercalation compounds (GIC's) with fluoroanions in order to obtain new materials and to develop a better understanding of the synthetic approaches and properties of the products. New GIC's containing borate chelate anion such as bis(oxalato)borate, CxB[OC(O)C(O)O] 2·deltaF, are prepared by the chemical oxidation of graphite with fluorine gas in the presence of a solution containing the intercalate anion in anhydrous hydrofluoric acid. Due to the chemical method employed (F2/AHF as the oxidizing agent), fluoride co-intercalates are present in the galleries. The GIC's compositions are determined using a newly-developed digestion method with an ion-selective electrode and potentiometer. The composition parameters x and delta are obtained using both elemental and thermogravimetric analyses (TGA). Elemental analyses of B and F for a stage 1 GIC indicate x &cong; 41 and delta &cong; 4. Powder XRD data and the structural refinement of these GIC's show that the intercalate anions "stand up" in the galleries, with the longer anion dimension oriented perpendicular to the graphene sheets, leading to the relatively large gallery height of di &cong; 1.42 nm.

ISBN: 9780549284611Subjects--Topical Terms:

1021807
Chemistry, General.

Graphite intercalation compounds containing fluoroanions.
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100 1 $a Katinonkul, Watcharee. $3 1265997
245 1 0 $a Graphite intercalation compounds containing fluoroanions.
300 $a 168 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-10, Section: B, page: 6656.
502 $a Thesis (Ph.D.)--Oregon State University, 2007.
520 $a New chemical synthesis strategies have been investigated for the preparation of acceptor-type graphite intercalation compounds (GIC's) with fluoroanions in order to obtain new materials and to develop a better understanding of the synthetic approaches and properties of the products. New GIC's containing borate chelate anion such as bis(oxalato)borate, CxB[OC(O)C(O)O] 2·deltaF, are prepared by the chemical oxidation of graphite with fluorine gas in the presence of a solution containing the intercalate anion in anhydrous hydrofluoric acid. Due to the chemical method employed (F2/AHF as the oxidizing agent), fluoride co-intercalates are present in the galleries. The GIC's compositions are determined using a newly-developed digestion method with an ion-selective electrode and potentiometer. The composition parameters x and delta are obtained using both elemental and thermogravimetric analyses (TGA). Elemental analyses of B and F for a stage 1 GIC indicate x &cong; 41 and delta &cong; 4. Powder XRD data and the structural refinement of these GIC's show that the intercalate anions "stand up" in the galleries, with the longer anion dimension oriented perpendicular to the graphene sheets, leading to the relatively large gallery height of di &cong; 1.42 nm.
520 $a The same chemical synthesis strategy is also used for chemical preparations of other two borate chelate GIC's; bis(perfluoropinacolato)borate, C xB[OC(CF3)2C(CF3)2O] 2·deltaF, and bis(hexafluorohydroxyisobutyrato)borate, C xB[OC(CF3)2C(O)O]2·deltaF. Stage 1 GIC's of these anions are obtained with the gallery height, di, of 1.43-1.45 nm. The fluoride co-intercalate contents in these GIC samples are also determined. The composition parameters x and delta are obtained using elemental analyses for stage 1 C xB[OC(CF3)2C(CF3)2O] 2·deltaF and for stage 1 CxB[OC(CF 3)2C(O)O]2·deltaF. TGA cannot be used to confirm these compositions due to the incomplete degradation of intercalates. Most likely, anions and their degradation products are trapped in the bulk of the large flaky graphite particles.
520 $a The detailed compositions of GIC's containing bis(trifluoromethanesulfonyl) imide, CxN(SO2CF3) 2·deltaF, and perfluorooctanesulfonate, CxC 8F17SO3·deltaF and fluoride co-intercalates are determined for the first time. These GIC's are prepared in aqueous HF, using K2MnF6 as the oxidizing agent. The fluoride co-intercalate content is approximately equimolar to anion content in both GIC's. For CxN(SO2CF3) 2·deltaF, the fluoride content increases steadily with reaction time while the anion content is relatively constant. In contrast, C xC8F17SO3·deltaF shows little change in the fluoride content over time.
590 $a School code: 0172.
650 4 $a Chemistry, General. $3 1021807
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0485
690 $a 0488
710 2 $a Oregon State University. $3 625720
773 0 $t Dissertation Abstracts International $g 68-10B.
790 $a 0172
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3286045