High-Resolution Infrared and Raman Spectra of the Polycrystalline Sinomenine Hydrochloride
1 School of Science, Tianjin Polytechnic University, Tianjin 300387, China
2 School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
High-resolution infrared and Raman spectra of the polycrystalline sinomenine (SM) hydrochloride have been measured to work out its whole really existing vibrational spectral bands. Except for the hydroxyl stretching modes and IR active bands less than 400 cm−1, most normal modes (about 34) are both IR and Raman active. In addition, 8 Raman bands less than 400 cm−1 are tentatively assigned, for the first time to our knowledge, to stretching/bending modes of the aromatic-ring−methoxyls and (SMH)+–Cl− ions, respectively.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.