[Structural variation of o-amino-benzoic acid induced by free electron laser].
Free electron laser (FEL) have been developed as tunable lasers over a wide range of wavelenths. Equipment in the region of 6-16 microns (1,660-630 cm-1) is available in the Beijing free electron laser erected by Institute of High Energy Physics, CAS. In this study we report first measurements of infrared-induced molecular change under irradiation by FEL of 9.414 microns and 6.228 microns, respectively. Taking o-amino-benzoic acid as an example, FTIR characterization indicates that the peak positions of both N-H and C=O stretching vibrations shift before and after the irradiation of FEL. It demonstrates that FEL induces the re-arrangement of H-bonds between COOH and NH2 by stimulating the vibration of carboxyl groups. It suggests that the presence of stable/metastable phases in the title compound.
Li
Yong
Y
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Xu
Yi-zhuang
YZ
Yang
Li-min
LM
Weng
Si-fu
SF
Gao
Hong-cheng
HC
Wu
Jin-guang
JG
Wang
Ming-kai
MK
Yang
Xue-ping
XP
Li
Yong-gui
YG
Fan
Yao-hui
YH
Wu
Gang
G
D004583:Electrons; D006860:Hydrogen Bonding; D007834:Lasers; D015394:Molecular Structure; D010777:Photochemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014732:Vibration; D062367:ortho-Aminobenzoates / Q000737:chemistry*
D062367:ortho-Aminobenzoates