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SPECIAL SECTION: AGROSPHERE INSTITUTE

Interactions between 2-Aminobenzothiazole and Natural Organic Matter as Evidenced by CPMAS Nitrogen-15 NMR Spectroscopy

^a Jülich Forschungszentrum, Institute of Chemistry and Dynamics of the Geosphere, Institute 4: Agrosphere, 52425 Jülich, Germany
^b Dipartimento di Ingegneria e Tecnologie Agro-Forestali, Università degli Studi di Palermo, v.le delle Scienze 13, 90128 Palermo, Italy
^* Corresponding author (a.berns{at}fz-juelich.de).

Received 7 February 2008.

Cross-polarization magic angle spinning (CPMAS) ¹⁵N nuclear magnetic resonance (NMR) spectroscopy was used to study the interactions between 2-aminobenzothiazole (ABT) and natural organic matter in the presence of the natural enzyme laccase and synthetic air. Through the use of synthesized model compounds, we were able to confirm previous findings by CPMAS ¹³C NMR spectroscopy that showed the formation of covalent amide bonds. We also provide evidence of the presence of two additional H bonds between ABT and the natural organic matter. Both H bonds involved the amino and thiazole groups of ABT.

Abbreviations: ABT, 2-aminobenzothiazole • CPMAS, cross-polarization magic angle spinning • HA, humic acid • HPLC, high-performance liquid chromatography • NMR, nuclear magnetic resonance

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