Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-5287
Main Title: Tuning of gallery heights in a crystalline 2D carbon nitride network
Author(s): Chong, Samantha Y.
Jones, James T. A.
Khimyak, Yaroslav Z.
Cooper, Andrew I.
Thomas, Arne
Antonietti, Markus
Bojdys, Michael J.
Type: Article
Language Code: en
Abstract: Poly(triazine imide)—a 2D layered network—can be obtained as an intercalation compound with halides from the ionothermal condensation of dicyandiamide in a eutectic salt melt. The gallery height of the intercalated material can be tuned via the composition of the eutectic melt and by post-synthetic modification. Here, we report the synthesis of poly(triazine imide) with intercalated bromide ions (PTI/Br) from a lithium bromide and potassium bromide salt melt. PTI/Br has a hexagonal unit-cell (P63cm (no. 185); a = 8.500390(68) Å, c = 7.04483(17) Å) that contains two layers of imide-bridged triazine (C3N3) units stacked in an AB-fashion as corroborated by solid-state NMR, FTIR spectroscopy and high-resolution TEM. By comparison with a recently reported material PTI/Li+Cl−, prepared from a LiCl/KCl eutectic, the layer-stacking distance in the analogous bromide material was expanded from 3.38 Å to 3.52 Å – an exceptionally large spacing for an aromatic, discotic system (cf. graphite 3.35 Å). Subsequent treatment of PTI/Br with concentrated ammonium fluoride yields poly(triazine imide) with intercalated fluoride ions (PTI/F) (P63/m (no. 176); a = 8.4212(4) Å, c = 6.6381(5) Å) as a statistical phase mix with PTI/Br. Fluoride intercalation leads to a contraction of the gallery height to 3.32 Å, demonstrating that the gallery height is synthetically tuneable in these materials.
URI: http://depositonce.tu-berlin.de/handle/11303/5667
http://dx.doi.org/10.14279/depositonce-5287
Issue Date: 2013
Date Available: 27-Jun-2016
DDC Class: 540 Chemie und zugeordnete Wissenschaften
530 Physik
Usage rights: Terms of German Copyright Law
Journal Title: Journal of materials chemistry : A, Materials for energy and sustainability
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 1
Issue: 4
Publisher DOI: 10.1039/c2ta01068b
Page Start: 1102
Page End: 1107
EISSN: 2050-7488
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:Technische Universität Berlin » Fakultäten & Zentralinstitute » Fakultät 2 Mathematik und Naturwissenschaften » Institut für Chemie » Publications

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