Biospin avance 3 500mhz nmr spectrometer

Solid-state 13 C NMR analysis was performed using a Bruker BioSpin Avance III 500MHz NMR spectrometer fitted with a H-X solid-state NMR probe. Prior to NMR analysis, fabrics were finely ground into a powder using a Wig-L-Bug mechanical grinder. Powdered fabric samples were packed into a 4mm Zirconium rotor and sealed with a Kel-F cap. Ramped amplitude cross polarization magic angle spinning (CP-MAS) NMR spectra were acquired with the following parameters: CP contact time (1ms), MAS spinning speed of 11kHz, and a recycle delay of 1s. NMR spectra were processed using a zero filling factor of 2 and line broadening of 50Hz. NMR spectra were phased and baseline corrected using Advanced Chemistry Development (version 15) software.

1 H NMR spectra were acquired using a Bruker BioSpin Avance III 500 MHz NMR spectrometer equipped with a 1 H-15 N-13 C TXI 1.7 mm microprobe fitted with an actively shielded Z gradient. 1 H NMR experiments were performed with Presaturation Using Relaxation Gradients and Echoes (PURGE) water suppression (Simpson and Brown, 2005) , 256 scans, a recycle delay of 3 s, and 32 K time domain points. Spectra were apodized through multiplication with an exponential decay corresponding to 0.3 Hz line broadening in the transformed spectra, and a zero filling factor of 2 (Lankadurai et al., 2011) . All spectra were manually phased and calibrated to the trimethylsilyl group of the DSS internal reference set to a chemical shift (δ) of 0.00 ppm.