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Characterization of Copper-Modified ZSM-5 with Sorbed Pyridine Using Nuclear Magnetic Resonance Spectroscopy

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An Erratum to this article was published on 10 July 2012

Abstract

Solid-state 1H, 13C and 29Si MAS NMR experiments were used to detect sorbed pyridine in hydrated copper-exchanged forms of synthetic zeolite ZSM-5, which is widely used in industry and green chemistry as well. The paper follows on from the previous study of sorption of organic pollutants by copper-modified forms of ZSM-5. Multinuclear MAS NMR experiments performed on hydrated and dehydrated copper-exchanged ZSM-5 samples with sorbed pyridine indicate that dissociation of water molecules in the vicinity of copper cations results in formation of new acid sites in the zeolite channels. Through their reaction with sorbed pyridine molecules, pyridinium ions are formed. 13C MAS NMR spectra also confirmed the presence of pyridine molecules not involved in forming pyridinium ions in the copper-modified ZSM-5 samples. From the changes in 29Si NMR spectra, some slight changes in the structure of original copper-modified ZSM-5 after pyridine sorption can be also deduced.

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Acknowledgments

The “We support research activities in Slovakia” project is co-financed from EU funds. This paper was developed as part of the project named “Centre of Excellence for Integrated Research & Exploitation of Advanced Materials and Technologies in Automotive Electronics”, ITMS 26220120055. One of the authors (LF) gratefully acknowledges financial support from VEGA grant No.1/0107/8. We are also indebted to Assoc. Prof. Pavol Hudec, CSc. from the Faculty of Chemical and Food Technology at the Slovak Technical University in Bratislava for his help and collaborative efforts.

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Authors and Affiliations

  1. Department of Physics, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Park Komenského 2, 042 00, Košice, Slovakia

    Stanislava Nagyová, Mária Kovaľaková, Oľga Fričová, Viktor Hronský & Dušan Olčák

  2. Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 041 01, Košice, Slovakia

    Ľubica Fortunová

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  1. Stanislava Nagyová
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  2. Mária Kovaľaková
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  3. Oľga Fričová
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  6. Ľubica Fortunová
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Correspondence to Mária Kovaľaková.

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Nagyová, S., Kovaľaková, M., Fričová, O. et al. Characterization of Copper-Modified ZSM-5 with Sorbed Pyridine Using Nuclear Magnetic Resonance Spectroscopy. Appl Magn Reson 43, 431–442 (2012). https://doi.org/10.1007/s00723-012-0353-6

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  • DOI: https://doi.org/10.1007/s00723-012-0353-6

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