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TERAHERTZ SPECTROSCOPIC INVESTIGATION OF SALICYLIC ACID AND SODIUM SALICYLATE
Ding, L.1,2; Fan, W. -H.1; Song, C.1,2; Chen, X.1,2; Chen, Z. -Y.1,2
Department瞬态光学技术国家重点实验室
2019-01
Source PublicationJOURNAL OF APPLIED SPECTROSCOPY
ISSN0021-9037;1573-8647
Volume85Issue:6Pages:1143-1150
Contribution Rank1
Abstract

The terahertz spectra of salicylic acid and sodium salicylate are measured by broadband terahertz time-domain spectroscopy (THz-TDS). Two absorption features of salicylic acid and three characteristic features of sodium salicylate are reported for the first time. Our investigation shows that salicylic acid and sodium salicylate can be easily distinguished based on their distinctive THz spectra, which could be attributed to their intra- and intermolecular structure differences. Furthermore, solid-state density functional theory calculations reveal that the absorption features of salicylic acid mainly originate from intermolecular interactions, except for the absorption feature at 2.28 THz, while gaseous-state theory calculations show that the absorption features of sodium salicylate mainly come from intramolecular vibrations except for the absorption feature at 0.40 THz. Our investigation indicates that THz vibrational modes are highly sensitive to molecular structures and intermolecular interactions, promoting the application of THz spectroscopy in distinguishing chemicals and pharmaceuticals with similar molecular structures.

Keywordterahertz spectrum density functional theory intermolecular interactions intramolecular vibrations
DOI10.1007/s10812-019-00773-w
Indexed BySCI
Language英语
WOS IDWOS:000463906800025
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.opt.ac.cn/handle/181661/31377
Collection瞬态光学技术国家重点实验室
Corresponding AuthorFan, W. -H.
Affiliation1.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Ding, L.,Fan, W. -H.,Song, C.,et al. TERAHERTZ SPECTROSCOPIC INVESTIGATION OF SALICYLIC ACID AND SODIUM SALICYLATE[J]. JOURNAL OF APPLIED SPECTROSCOPY,2019,85(6):1143-1150.
APA Ding, L.,Fan, W. -H.,Song, C.,Chen, X.,&Chen, Z. -Y..(2019).TERAHERTZ SPECTROSCOPIC INVESTIGATION OF SALICYLIC ACID AND SODIUM SALICYLATE.JOURNAL OF APPLIED SPECTROSCOPY,85(6),1143-1150.
MLA Ding, L.,et al."TERAHERTZ SPECTROSCOPIC INVESTIGATION OF SALICYLIC ACID AND SODIUM SALICYLATE".JOURNAL OF APPLIED SPECTROSCOPY 85.6(2019):1143-1150.
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