title: FT-IR spectroscopic study on the variations of molecular structures of some carboxyl acids induced by free electron laser.
abstract: Free electron laser has been developed as tunable lasers over a wide range of wavelengths. Devices irradiating in the region of 6-16 microm (1666-625 cm-1) are operable in the Beijing free electron lasers facilities (BFEL). For understanding the interactions between FEL and biological tissues, in this study wavelength-selective infrared-induced structure changes of substances under irradiation by FEL were measured using FT-IR spectroscopy. The carboxyl acids and carboxylates samples investigated include salicylic acid, sulfosalicylic acid, cholic acid, deoxycholic acid, sodium cholate and sodium deoxycholate. The changes of the FT-IR spectra of the molecules prove that the spectral variations of the samples induced by FEL are closely related to their hydrogen bond networks.
authors.affiliation: College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Limin
authors.initials: L
authors.lastname: Yang
authors.forename: Yizhuang
authors.initials: Y
authors.lastname: Xu
authors.forename: Yunlan
authors.initials: Y
authors.lastname: Su
authors.forename: Jinguang
authors.initials: J
authors.lastname: Wu
authors.forename: Kui
authors.initials: K
authors.lastname: Zhao
authors.forename: Jia'er
authors.initials: J
authors.lastname: Chen
authors.forename: Mingkai
authors.initials: M
authors.lastname: Wang
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry* / Q000528:radiation effects*; D004583:Electrons; D007834:Lasers; D015394:Molecular Structure; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002264:Carboxylic Acids