Probing 15N-15N Correlations in g-C3N4 Samples with Solid-State NMR SHA+ Pulse Sequence

doi:10.11938/cjmr20160301

Abstract

Abstract:

The performance of solid-state NMR proton-driven spin-diffusion (PDSD) and second-order Hamiltonian among analogous nuclei plus (SHA+) sequences for probing ¹⁵N-¹⁵N through-space correlations in ¹⁵N-labelled g-C₃N₄ samples were compared at high magnetic fields with moderate magic angle spinning (MAS) frequencies. It was found that, relative to the PDSD sequence, the SHA+ sequence is more efficient in terms of yielding polarization transfer between the ¹⁵N atoms as long as one of the nitrogen atoms bonds to protons. The results are useful in guiding the choice of solid-state nuclear magnetic resonance (SS-NMR) sequences for studying nitrogen-doped carbon-based materials.

Key words: solid-state nuclear magnetic resonance (SS-NMR), homo-nuclear correlation, long-range correlation, SHA+

CLC Number:

O482.53

YAN Xiao-jing, HU Bing-wen. Probing ¹⁵N-¹⁵N Correlations in g-C₃N₄ Samples with Solid-State NMR SHA+ Pulse Sequence[J]. Chinese Journal of Magnetic Resonance, 2016, 33(3): 361-367.

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Probing ¹⁵N-¹⁵N Correlations in g-C₃N₄ Samples with Solid-State NMR SHA+ Pulse Sequence

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