Transformation and dehydration kinetics of methylene blue hydrates detected by terahertz time-domain spectroscopy
文献类型：期刊论文
| 作者 | Yan, Shihan1 ; Zhang, Hua1; Yang, Zhongbo1; Tang, Mingjie1; Zhang, Mingkun1; Du, Chunlei1; Cui, Hong-Liang1,2; Wei, Dongshan1
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| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2017 |
| 卷号 | 7期号:66页码:41667-41674 |
| ISSN号 | 2046-2069 |
| DOI | 10.1039/c7ra07118c |
| 通讯作者 | Wei, DS (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Multiscale Mfg Technol, Chongqing 400714, Peoples R China. |
| 英文摘要 | Methylene blue (MB) as an important dye and medicine, has several different crystalline hydrates. These MB hydrates can transform from one to another at different temperatures or humidities. Determination of these hydrates is a big challenge for traditional spectroscopic technologies like infrared spectroscopy (IR) and Raman spectroscopy due to the component and structure similarities among these hydrates. We present a terahertz (THz) spectroscopy technology to differentiate three typical MB hydrates: pentahydrate, dihydrate and anhydrate. The pentahydrate exhibits prominent THz absorption features at 0.84 and 1.68 THz, and the dihydrate exhibits a broad and weak absorption peak at 0.89 THz, while the anhydrate has no obvious characteristic absorption peak at the measured spectral range of 0.2-2.0 THz. The dehydration kinetics of MB hydrates is investigated according to the variation of one of the main THz characteristic absorption peaks of MB pentahydrate with the heating time at different heating temperatures. A clear relation between the dehydration rate and the heating temperature can be fitted by an Arrhenius equation. The fitted activation energy of 64.5 kJ mol(-1) is quite consistent with the enthalpy change due to the transformation of MB pentahydrate to MB anhydrate reported in a previous study. |
| 资助项目 | National 973 Program of China[2015CB755401] ; National Key Research and Development Program of China[2017YFF0106303] ; National Key Research and Development Program of China[2016YFC0101300] ; National Key Research and Development Program of China[2016YFC0101002] ; national natural science foundation of China[11504372] ; national natural science foundation of China[21407145] ; national natural science foundation of China[31400625] ; national natural science foundation of China[61605206] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000409147000041 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://172.16.51.4:88/handle/2HOD01W0/285]  |
| 专题 | 太赫兹技术研究中心 微纳制造与系统集成研究中心 |
| 通讯作者 | Wei, Dongshan |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing Key Lab Multiscale Mfg Technol, Chongqing 400714, Peoples R China 2.Jilin Univ, Coll Instrumentat Sci & Elect Engn, Changchun 130061, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Shihan,Zhang, Hua,Yang, Zhongbo,et al. Transformation and dehydration kinetics of methylene blue hydrates detected by terahertz time-domain spectroscopy[J]. RSC ADVANCES,2017,7(66):41667-41674. |
| APA | Yan, Shihan.,Zhang, Hua.,Yang, Zhongbo.,Tang, Mingjie.,Zhang, Mingkun.,...&Wei, Dongshan.(2017).Transformation and dehydration kinetics of methylene blue hydrates detected by terahertz time-domain spectroscopy.RSC ADVANCES,7(66),41667-41674. |
| MLA | Yan, Shihan,et al."Transformation and dehydration kinetics of methylene blue hydrates detected by terahertz time-domain spectroscopy".RSC ADVANCES 7.66(2017):41667-41674. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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