Advanced two-dimensional solid-state NMR spectroscopy and its application in environmental sciences

Abstract Recent developments in two-dimensional (2D) solid-state NMR pulse sequences have greatly advanced the possibilities for structural identification and quantification of natural organic matter. These developments are key reasons that solid-state NMR has rapidly emerged as a core analytical method for the study of solid samples and materials in the environment. Here we present some 2D solid-state NMR techniques that are useful for the characterization of complex natural materials, including 1H-13C heteronuclear correlation and dipolar-dephased DQ/SQ. In addition to general introductions to these methods, we will also discuss their applications for structural determination of natural organic matter in the environment. These techniques are critical components for a comprehensive analysis of environmental samples and understanding their applications will facilitate the application of 2D solid-state NMR to the study of large and complex organic materials in the environment.