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Proton NMR acquisition and processing conditions_1_

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									Typical parameters used to record 1H NMR spectra on the 250, DPX-
400, Avance-400 and Avance-500.


DPX-400 (Old-400 in F114a)
NMR spectra were obtained on a Bruker DPX-400 MHz spectrometer operating at
400.13 MHz for protons, employing a high-resolution dual(1H 13C) gradients probe.
Spectra were recorded using the zg30 pulse program with P90 = 11.8 μs covering a
sweep width of 20.7 ppm (8278 Hz) with 64k time domain data points giving an
acquisition time of 3.95 seconds, Fourier transformed using 128k data points and
referenced to an internal TMS standard at 0.0 ppm.

Avanve-400 ultra shield (New-400 in F113)
NMR spectra were obtained on a Bruker ultra-shield Av-400 spectrometer operating
at 400.13 MHz for protons, employing a 5mm high-resolution broad-band ATMA
gradients probe. Spectra were recorded using the zg30 pulse program with P90 = 15.25
μs covering a sweep width 20.7 ppm (8278 Hz) with 64k time domain data points
giving an acquisition time of 3.95 seconds, Fourier transformed using 128k data
points and referenced to an internal TMS standard at 0.0 ppm.

Avanve-500 (In F202)
NMR spectra were obtained on a Bruker Avance-500 spectrometer operating at
500.13 MHz for protons, employing a 5mm high-resolution broad-band ordinary
geometry probe. Spectra were recorded using the zg30 pulse program with P90 = 12.5
μs covering a sweep width 20.0 ppm (10,000 Hz) with 128k time domain data points
giving an acquisition time of 5.0 seconds, Fourier transformed using 128k data points
and referenced to an internal TMS standard at 0.0 ppm.


AC-250
NMR spectra were obtained on a Bruker AC-250 MHz spectrometer operating at
250.13 MHz for protons, employing a 5 mm high-resolution broad-band HX probe.
Spectra were recorded using a 3.6 μs pulse covering a sweep width of 22 ppm (5494
Hz) with 32k time domain data points giving an acquisition time of 2.98 seconds,
FIDs are transferred using OPEN-ASPECT software to a PC, then Fourier
transformed using 32k data points using Bruker WINNMR software and referenced to
an internal TMS standard at 0.0 ppm.

								
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