Characterization of cocrystals formed by grinding amino acids through terahertz time-domain spectroscopy

被引：5
|
作者：
Zhao, Xiaoyan [1 ]
Su, Haixia [1 ]
Zhang, Zhaohui [1 ]
Li, Zhi [1 ]
Zhang, Han [1 ]
Zhang, Tianyao [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Dept Instrumentat Sci, Beijing 100083, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 2014年 / 59卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Terahertz time-domain spectroscopy (THz-TDS); Amino acid; Ground mixture; Cocrystals; Extra absorption peak; SOLID-STATE; CRYSTAL;
D O I：
10.1007/s11434-014-0432-1
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In this paper, we used terahertz time-domain spectroscopy (THz-TDS) over a range of 0.3-2.5 THz to investigate the formation of solid-state cocrystals of amino acids, formed by grinding mixtures of two different kinds of amino acids. For comparison, we prepared dual-layer samples, combined by pressing two single-component pellets together without grinding. In the ground-mixture samples, some extra absorption peaks appeared, different from the characteristic peaks of the pure components, but these peaks did not appear in the dual-layer samples. Thus, these extra absorption peaks in the THz range are unique features of cocrystals. From our results, we believe that THz-TDS is a promising technique to characterize cocrystals.
引用
收藏
页码：2987 / 2993
页数：7
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