2.4.2. 13C Cross-polarization, magic-angle spinning, solid-state (ss)
NMR
The 13C cross polarization magic spinning solid-state NMR
experiment was performed according to the method reported by
Taylor [29,30]. All 13C CP MAS ssNMR experiments were performed
on the 600 MHz 89mmwide-bore Bruker Advance III spectrometer
equipped with a 4 mm HXY solid-state MAS probe with two of the
channels configured for 1H and 13C. A reduced volume rotor (50 l)
was utilized and the active volume was mapped to ensure that the
active coil volume entirely contained the sample volume. Based on
these findings, prior to the addition of pre-dried samples, polytetrafluoroethylene
(“10 mg”) was added into the bottom of the
rotor in addition to a Teflon plug being positioned above the sample.
The rotor was weighed before and after the addition of samples.
The conditions for 13C CP MAS ssNMR were as follows: 7000
scans, spinning rate of 11.3 KHz, acquisition time of 0.02 s, and
temperature of 278 K.
2.4.2. 13C Cross-polarization, magic-angle spinning, solid-state (ss)NMRThe 13C cross polarization magic spinning solid-state NMRexperiment was performed according to the method reported byTaylor [29,30]. All 13C CP MAS ssNMR experiments were performedon the 600 MHz 89mmwide-bore Bruker Advance III spectrometerequipped with a 4 mm HXY solid-state MAS probe with two of thechannels configured for 1H and 13C. A reduced volume rotor (50 l)was utilized and the active volume was mapped to ensure that theactive coil volume entirely contained the sample volume. Based onthese findings, prior to the addition of pre-dried samples, polytetrafluoroethylene(“10 mg”) was added into the bottom of therotor in addition to a Teflon plug being positioned above the sample.The rotor was weighed before and after the addition of samples.The conditions for 13C CP MAS ssNMR were as follows: 7000scans, spinning rate of 11.3 KHz, acquisition time of 0.02 s, andtemperature of 278 K.
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