Fig. 7

The spectral region of C-H and N–H stretching vibrations in the simulated Raman spectra of the UDMA model (Fig. 2) in natural state (1) and selectively deuterated states at C1-C2 (2), C3-C4 (3) and C1-C2, C3-C4 and N1 sites (4).

The spectral region of C-H and N–H stretching vibrations in the simulated Raman spectra of the UDMA model (Fig. 2) in natural state (1) and selectively deuterated states at C1-C2 (2), C3-C4 (3) and C1-C2, C3-C4 and N1 sites (4).