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Water/polymer interactions in poly(amidoamine) hydrogels by 1H nuclear magnetic resonance relaxation and

Lucia Calucci1, Claudia Forte, Elisabetta Ranucci

  • 1Istituto per i Processi Chimico-Fisici del CNR, Area della Ricerca di Pisa, via G. Moruzzi 1, 56124 Pisa, Italy.

The Journal of Chemical Physics
|August 22, 2008
PubMed

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In proton NMR spectroscopy, primary amines and secondary amines showcase their N–H protons as a broad signal in the chemical shift range between δ 0.5 and 5 ppm. The exact position in this range depends on several factors, including sample concentration, hydrogen bonding, and the type of solvent used. Since amine protons undergo fast proton exchange in solution, the protons are labile and therefore do not participate in any splitting with adjacent protons. Thus, the observed peak is broad and...