Table 1.

NMR Fitting Parameters^a and Relative Populations for the 1D ¹¹B Spin Echo Spectrum of Spent h-BNNT Recorded at B₀ = 35.2 T.

Boron Speciesb	δiso(11B) (ppm)	CQ (MHz)	Population Determined from Analytical Simulation (%)	Population Determined from Integration (%)
BN3	31.2 – 30.5	2.85	51.2	69.8c
BN2O	29.6 – 28.2	2.85	20.3
BNO2	24.2	2.7	0.6	1.9
BO3	19.4 – 17.8	2.5	27.5	27.6
BO4	1.5	1.2	0.4	0.7

^aAll peaks were fit with η = 0.

^bOnly heteroatoms covalently bonded to boron are listed.

^cIntegration includes BN₃ and BN₂O due to spectral overlap.