Abstract
Terahertz transmission spectra of methylparaben, ethylparaben, propyl-p-hydroxybenzoate and butyl-p-hydroxybenzoate were measured by terahertz time-domain spectroscopy (THz-TDS) at 7.8 K. While it was difficult to observe the THz absorbance peaks of these esters at room temperature (294.3 K), they could be observed at 7.8 K. The THz absorbance peaks of these materials were at a higher frequency at 7.8 K than that at room temperature. Density functional theory (DFT) was used to simulate the vibrational spectrum of ethylparaben to study the origin of the THz absorbance peaks. This research provides reference data for the spectral properties of parabens and the identification of their molecular structures and vibration modes in the terahertz range.
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ZHAO GuoZhong was born in 1964. He received the Ph.D. degree in 1996 from Institute of Physics, Chinese Academy of Sciences, Beijing. Currently, he is a full professor of physics at Capital Normal University. Research interests include THz spectroscopy and imaging, virtual instrument technology, and optoelectronic and information functional materials. Dr. Zhao GuoZhong is a member of SPIE, COS, as well as CPS, and the reviewer of several journals such as Chinese Physics Letters, Acta Physics Sinica, Chinese Journal of Laser, and so on.
WANG He was born in 1985. She received the MS Degree in 2011 from Capital Normal University, Beijing. Currently, she is a teacher of physics at Beijing Geological Middle School. Her research interests include THz spectroscopy and optoelectronic materials. She was the student member of SPIE.
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Zhao, G., Wang, H., Liu, L. et al. THz spectra of parabens at low temperature. Sci. China Inf. Sci. 55, 114–119 (2012). https://doi.org/10.1007/s11432-011-4511-5
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DOI: https://doi.org/10.1007/s11432-011-4511-5