NDLI: Poly(triazine imide) with Intercalation of Lithium and Chloride Ions $[(C_{3}N_{3})_{2}(NH_{x}Li_{1−x})_{3}⋅LiCl]:$ A Crystalline 2D Carbon Nitride Network

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Poly(triazine imide) with Intercalation of Lithium and Chloride Ions $[(C_{3}N_{3})_{2}(NH_{x}Li_{1−x})_{3}⋅LiCl]:$ A Crystalline 2D Carbon Nitride Network

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Poly(triazine imide) with Intercalation of Lithium and Chloride Ions $[(C_{3}N_{3})_{2}(NH_{x}Li_{1−x})_{3}⋅LiCl]:$ A Crystalline 2D Carbon Nitride Network

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Döblinger, Markus Wirnhier, Eva Lotsch, Bettina V. Gunzelmann, Daniel Senker, Jürgen Schnick, Wolfgang
Description	Author Affiliation: Wirnhier E ( Department Chemie, Lehrstuhl für Anorganische Festkörperchemie, Ludwig-Maximilians-Universität, Butenandtstrasse 5-13 (D), 81377 München, Germany.)
Abstract	Poly(triazine imide) with intercalation of lithium and chloride ions $(PTI/Li^{+}Cl^{−})$ was synthesized by temperature-induced condensation of dicyandiamide in a eutectic mixture of lithium chloride and potassium chloride as solvent. By using this ionothermal approach the well-known problem of insufficient crystallinity of carbon nitride (CN) condensation products could be overcome. The structural characterization of $PTI/Li^{+}Cl^{−}$ resulted from a complementary approach using spectroscopic methods as well as different diffraction techniques. Due to the high crystallinity of $PTI/Li^{+}Cl^{−}$ a structure solution from both powder X-ray and electron diffraction patterns using direct methods was possible; this yielded a triazine-based structure model, in contrast to the proposed fully condensed heptazine-based structure that has been reported recently. Further information from solid-state NMR and FTIR spectroscopy as well as high-resolution TEM investigations was used for Rietveld refinement with a goodness-of-fit $(χ^{2})$ of 5.035 and wRp=0.05937. $PTI/Li^{+}Cl^{−}$ $(P6_{3}cm$ (no. 185); a=846.82(10), c=675.02(9) pm) is a 2D network composed of essentially planar layers made up from imide-bridged triazine units. Voids in these layers are stacked upon each other forming channels running parallel to [001], filled with $Li^{+}$ and $Cl^{−}$ ions. The presence of salt ions in the nanocrystallites as well as the existence of $sp^{2}-hybridized$ carbon and nitrogen atoms typical of graphitic structures was confirmed by electron energy-loss spectroscopy (EELS) measurements. Solid-state NMR spectroscopy investigations using $^{15}N-labeled$ $PTI/Li^{+}Cl^{−}$ proved the absence of heptazine building blocks and $NH_{2}$ groups and corroborated the highly condensed, triazine-based structure model.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	11
Volume Number	17
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2011-03-07
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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