Friday, August 16, 2013

Common peak assignments HNMR

To demystify HNMR a bit some common peak assignments are listed here

From AIST unless otherwise specified:
polymer (PLGA) glycolide ~4.8ppm (2H), lactide ~5.2-5.3ppm (CHC=O), lactide ~1.5ppm (-CH3)
Poly(ethylene glycol): ~3.6 (CH2CH2O), ~3.4 (O-CH3, methyl-PEG), ~4.2 (CH2CH2O-ester terminus)

monomers:
Lactide: 5.049, 1.618
Glycolide: ~5.0

Volatile solvents commonly used in processing:
ethanol: 3.687, 2.61, 1.226 ppm
hexane: 1.29, 1.27, 0.89
dichloromethane: 5.297

From HNMR process itself:
Water (common contaminant in HNMR solvent):
CHCl3 (non-dueterated): 7.256
Post a Comment