Intercalation and coordination of copper(II)-2,2′-bipyridine complexes into graphite oxide

Szabó, T. and Szabó-Plánka, T. and Jónás, D. and Nagy, Nóra Veronika and Rockenbauer, Antal (2014) Intercalation and coordination of copper(II)-2,2′-bipyridine complexes into graphite oxide. CARBON, 2014 (2). pp. 425-528. ISSN 0008-6223

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Abstract

Copper-intercalated graphite oxides (GO) were prepared by adding complex solutions of cupric ions and 2,2′-bipyridine (L) ligands to exfoliated GO dispersion at pH = 7. High adsorption capacity (>140 mg Cu/g GO) was found for adsorption from equimolar solution of Cu2+ and L, while the excess of ligand results in progressively decreasing adsorbed amounts. Electron paramagnetic resonance spectra revealed two principal adsorption mechanisms: the CuL3 2 + complex undergoes ion exchange adsorption, while CuL2+ and CuL2 2 + bind to graphene oxide layers by coordination. © 2014 Elsevier Ltd. All rights reserved.

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