@article{oai:tsukuba.repo.nii.ac.jp:00030958, author = {柴田, 知彦 and 森, 龍也 and 小島, 誠治 and Shibata, Tomohiko and Igawa, Hikaru and Kim, Tae Hyun and Mori, Tatsuya and Kojima, Seiji}, journal = {Journal of molecular structure}, month = {}, note = {A liquid–glass transition and a crystalline state of pharmaceutical racemic ketoprofen were studied by Raman scattering and the broadband terahertz time-domain spectroscopy (THz-TDS) in the frequency range from 9 to 260 cm−1. The low-frequency Raman scattering spectra clearly shows the remarkable change related to a liquid–glass transition at about Tg = 267 K. After melt-quenching at liquid nitrogen temperature, a boson peak appears at about 16.5 cm−1 near and below Tg and the intensity of quasi-elastic scattering related to structural relaxation increases markedly on heating. The crystalline racemic ketoprofen of “conformer A” shows the noncoincidence effect of mode frequencies below 200 cm−1 between Raman scattering spectra and dielectric spectra observed by THz-TDS.}, pages = {185--188}, title = {Glass transition dynamics of anti-inflammatory ketoprofen studied by Raman scattering and terahertz time-domain spectroscopy}, volume = {1062}, year = {2014} }