14N NMR in AlN and BN

Area of Science:

• Solid-state NMR Spectroscopy
• Materials Science
• Inorganic Chemistry

Background:

• Nuclear Quadrupole Coupling (Cq) provides insights into the local electronic environment of atomic nuclei.
• Binary nitrides like aluminum nitride (AlN) and boron nitride (BN) are important materials with diverse applications.
• Understanding Cq in these nitrides is crucial for correlating their structure with properties.

Purpose of the Study:

• To characterize the 14N Nuclear Quadrupole Coupling (Cq) in aluminum nitride (AlN) and boron nitride (BN) using Nuclear Magnetic Resonance (NMR).
• To determine or establish upper limits for Cq at the nitrogen site in AlN and BN.
• To provide Cq data for aluminum (Al) and boron (B) sites and compare these values with other binary compounds.

Main Methods:

• 14N Nuclear Magnetic Resonance (NMR) spectroscopy was employed.
• Static and magic angle spinning (MAS) NMR lineshape analyses were performed.
• Nuclear quadrupole coupling parameters were extracted from the spectral data.

Main Results:

• The nuclear quadrupole coupling (Cq) at the nitrogen site in AlN and BN was determined, with upper limits established where direct determination was challenging.
• Cq values were also reported for the aluminum (Al) and boron (B) nuclei in their respective nitrides.
• A comparative analysis of Cq values across AlN, BN, and other related binary compounds was conducted.

Conclusions:

• The study successfully characterized the 14N NMR spectra of AlN and BN, yielding valuable Cq data.
• The obtained Cq values contribute to a deeper understanding of the bonding and electronic structure in these binary nitrides.
• The comparison with other wurtzite-type compounds provides a broader context for interpreting quadrupole interactions in similar materials.