Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State
Terahertz (THz) absorption spectra of the similarly structured molecules with amide groups including benzamide, acrylamide, caprolactam, salicylamide, and sulfanilamide in the solid phase at room temperature and 7.8 K for salicylamide are reported and compared to infrared vibrational spectral calcul...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Journal of Spectroscopy |
| Online Access: | http://dx.doi.org/10.1155/2014/732802 |
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| author | Ye Jiang Fengshan Zhou Xiaodong Wen Limin Yang Guozhong Zhao He Wang Haiyan Wang Yanjun Zhai Jinguang Wu Kexin Liu Jia’er Chen |
| author_facet | Ye Jiang Fengshan Zhou Xiaodong Wen Limin Yang Guozhong Zhao He Wang Haiyan Wang Yanjun Zhai Jinguang Wu Kexin Liu Jia’er Chen |
| author_sort | Ye Jiang |
| collection | DOAJ |
| description | Terahertz (THz) absorption spectra of the similarly structured molecules with amide groups including benzamide, acrylamide, caprolactam, salicylamide, and sulfanilamide in the solid phase at room temperature and 7.8 K for salicylamide are reported and compared to infrared vibrational spectral calculations using density functional theory. The results of THz absorption spectra show that the molecules have characteristic bands in the region of 0.2–2.6 THz (~7–87 cm−1). THz technique can be used to distinguish different molecules with amide groups. In the THz region benzamide has three bands at 0.83, 1.63, and 1.73 THz; the bands are located at 1.44 and 2.00 THz for acrylamide; the bands at 1.24, 1.66 and 2.12 THz are observed for caprolactam. The absorption bands are located at 1.44, 1.63, and 2.39 THz at room temperature, and at 1.22, 1.46, 1.66, and 2.41 THz at low temperature for salicylamide. The bands at 1.63, 1.78, 2.00, and 2.20 THz appear for sulfanilamide. These bands in the THz region may be related to torsion, rocking, wagging, and other modes of different groups in the molecules. |
| format | Article |
| id | doaj-art-1934ece092f74b9493f1ff4e58d322a3 |
| institution | Kabale University |
| issn | 2314-4920 2314-4939 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Spectroscopy |
| spelling | doaj-art-1934ece092f74b9493f1ff4e58d322a32025-02-03T05:46:36ZengWileyJournal of Spectroscopy2314-49202314-49392014-01-01201410.1155/2014/732802732802Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid StateYe Jiang0Fengshan Zhou1Xiaodong Wen2Limin Yang3Guozhong Zhao4He Wang5Haiyan Wang6Yanjun Zhai7Jinguang Wu8Kexin Liu9Jia’er Chen10College of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian 116600, ChinaSchool of Materials Science and Technology, China University of Geosciences, Beijing 100083, ChinaState Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, ChinaState Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, ChinaDepartment of Physics, Capital Normal University, Beijing 100037, ChinaDepartment of Physics, Capital Normal University, Beijing 100037, ChinaDepartment of Physics, Capital Normal University, Beijing 100037, ChinaCollege of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian 116600, ChinaThe State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, ChinaState Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, ChinaState Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, ChinaTerahertz (THz) absorption spectra of the similarly structured molecules with amide groups including benzamide, acrylamide, caprolactam, salicylamide, and sulfanilamide in the solid phase at room temperature and 7.8 K for salicylamide are reported and compared to infrared vibrational spectral calculations using density functional theory. The results of THz absorption spectra show that the molecules have characteristic bands in the region of 0.2–2.6 THz (~7–87 cm−1). THz technique can be used to distinguish different molecules with amide groups. In the THz region benzamide has three bands at 0.83, 1.63, and 1.73 THz; the bands are located at 1.44 and 2.00 THz for acrylamide; the bands at 1.24, 1.66 and 2.12 THz are observed for caprolactam. The absorption bands are located at 1.44, 1.63, and 2.39 THz at room temperature, and at 1.22, 1.46, 1.66, and 2.41 THz at low temperature for salicylamide. The bands at 1.63, 1.78, 2.00, and 2.20 THz appear for sulfanilamide. These bands in the THz region may be related to torsion, rocking, wagging, and other modes of different groups in the molecules.http://dx.doi.org/10.1155/2014/732802 |
| spellingShingle | Ye Jiang Fengshan Zhou Xiaodong Wen Limin Yang Guozhong Zhao He Wang Haiyan Wang Yanjun Zhai Jinguang Wu Kexin Liu Jia’er Chen Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State Journal of Spectroscopy |
| title | Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State |
| title_full | Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State |
| title_fullStr | Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State |
| title_full_unstemmed | Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State |
| title_short | Terahertz Absorption Spectroscopy of Benzamide, Acrylamide, Caprolactam, Salicylamide, and Sulfanilamide in the Solid State |
| title_sort | terahertz absorption spectroscopy of benzamide acrylamide caprolactam salicylamide and sulfanilamide in the solid state |
| url | http://dx.doi.org/10.1155/2014/732802 |
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