title: Identification of Genistein and Biochanin A by THz (far-infrared) vibrational spectra.
abstract: The temperature dependent vibrational spectra of Genistein and Biochanin A, major components in Mongolian medicines Agi, in the range of 0.5-4.5 THz (16.7-150 cm(-1)) are presented for the first time. Over the temperature range from 295 to 77K, 12 highly resolved spectral features for the Genistein and 13 features for Biochanin A were measured by THz-TDS and display strong linewidth narrowing and frequency blue-shift with cooling. Such narrow-line THz fingerprint spectra provide a rapid, nondestructive and reliable method for the identification of these Chinese traditional medicines.
authors.affiliation: School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK 74078, USA.
authors.forename: Yuping
authors.initials: Y
authors.lastname: Yang
authors.forename: S Sree
authors.initials: SS
authors.lastname: Harsha
authors.forename: Alisha J
authors.initials: AJ
authors.lastname: Shutler
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Grischkowsky
mesh_terms: D019833:Genistein / Q000032:analysis*; D013696:Temperature
chemical_list: D019833:Genistein; C004541:biochanin A