Potassium melonate, K3[C6N7(NCN)3]·5H2O, and its potential use for the synthesis of graphite-like C3N4 materials

Elisabeta Horvath-Bordon; Edwin Kroke; Ingrid Svoboda; Hartmut Fuess; Ralf Riedel

doi:10.1039/B416390G

Potassium melonate, K₃[C₆N₇(NCN)₃]·5H₂O, and its potential use for the synthesis of graphite-like C₃N₄ materials†

Elisabeta Horvath-Bordon,^ab Edwin Kroke,*^a Ingrid Svoboda,^b Hartmut Fuess^b and Ralf Riedel^b

* Corresponding authors

^a Chemical Materials Science, Chemistry Department, University of Konstanz, Universitätsstrasse 10, Konstanz, Germany
E-mail: edwin.kroke@uni-konstanz.de
Fax: +49 6151 884406
Tel: +49 6151 884415

^b Institute of Materials Science, Darmstadt University of Technology, Petersenstrasse 23, Darmstadt, Germany

Abstract

Melonates, M^x_3/x[C₆N₇(NCN)₃], contain the aromatic and planar tricyanamino-s-heptazine anion. Only one example, the potassium derivative, has been isolated in pure form so far, but it has never been characterised comprehensively. Potassium melonate is obtained from a reaction of the polymer melon, [C₆N₉H₃]_n, with KSCN. ¹³C NMR, FTIR, Raman, UV-vis and luminescence spectroscopy support the proposed molecular structure. The crystal structure of the hydrate K₃[C₆N₇(NCN)₃]·5H₂O was determined by single crystal X-ray analysis (MoK_α: Pbca (no. 161), a = 6.538(2), b = 24.033(6), c = 23.684(6) Å and Z = 8). Thermogravimetric analysis shows that the dehydrated salt starts to decompose at temperatures above 500 °C. The [C₆N₇(NCN)₃] unit is an ideal molecular building block for carbon(IV) nitrides, especially s-heptazine based graphite-like C₃N₄ networks.

Article information

https://doi.org/10.1039/B416390G

Article type

Paper

Submitted

24 Oct 2004

Accepted

11 Jan 2005

First published

18 Mar 2005

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New J. Chem., 2005,29, 693-699

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Potassium melonate, K₃[C₆N₇(NCN)₃]·5H₂O, and its potential use for the synthesis of graphite-like C₃N₄ materials

E. Horvath-Bordon, E. Kroke, I. Svoboda, H. Fuess and R. Riedel, New J. Chem., 2005, 29, 693 DOI: 10.1039/B416390G

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