Citation: CHENG Xiao-Meng, LI Yu, CHEN Zong, LI Hong-Ping, ZHENG Xiao-Fang. A Comparative Study on theNMR Relaxation of Methanol in Sub-and Super-Critical Mixtures of CO₂ and Methanol[J]. Acta Physico-Chimica Sinica, ;2016, 32(11): 2671-2677. doi: 10.3866/PKU.WHXB201608122 shu

A Comparative Study on theNMR Relaxation of Methanol in Sub-and Super-Critical Mixtures of CO₂ and Methanol

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

Received Date: 14 July 2016
Revised Date: 3 August 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21543009, 21073167, J1210060), and Innovative Research Grant for Undergraduate Students of National/Zhengzhou University, China (201410459047, 201510459046, 2016xjxm259).

¹H NMR longitudinal relaxation times (T_1,exp of the hydroxyl and methyl group) of methanol in supercritical and subcritical gas-like and liquid-like CO₂+methanol mixtures were obtained as a function of pressure up to 25 MPa and at 293.15 and 308.15 K, respectively. This study was designed to investigate the mechanism of the spin-lattice relaxation (SLR) time T1 in different phase regions of CO₂+methanol as homogenous gas-like, and liquid-like mixtures, and the influence of pressure, temperature, and composition on the relaxation rate was examined. Moreover, the density dependent isotherms of the SLR rates 1/T_1,exp were comparatively studied between gas-like and liquid-like binary mixtures. There exists an obvious phase dependent SLR mechanism within the temperature and pressure range carried out herein, that is, the SLR process is dominated by the dipole-dipole (DD) interaction mechanism for both liquid-like mixture and methanol, whereas by the spin-rotation (SR) mechanism for gas-like mixture. Measurement of nuclear magnetic relaxation times can offer micro-dynamic and micro-structural information and are very useful for the study of fluids of strongly interacting molecules. Mutual influence of electric dipoles as well as hydrogen bonds helps determine the structure of the fluid and its molecular dynamics. The present work increases our knowledge of molecular dynamics of alcohols in sub-and supercritical CO₂.
- CO₂-methanol mixture,
- Dipole-dipole interaction mechanism,
- Subcritical and supercritical fluid,
- Spin-lattice relaxation rate,
- Spin-rotation mechanism
1. [1]
2. [2]
3. [3]
4. [4]
5. [5]
6. [6]
7. [7]
8. [8]
9. [9]
10. [10]
11. [11]
12. [12]
13. [13]
14. [14]
15. [15]
16. [16]
17. [17]
18. [18]
19. [19]
20. [20]
21. [21]
22. [22]
23. [23]
24. [24]
25. [25]
26. [26]
27. [27]
28. [28]
29. [29]
30. [30]
31. [31]
32. [32]
33. [33]
34. [34]
35. [35]
36. [36]
37. [37]
38. [38]
39. [39]
1. [1]
  Xiaofei Liu , He Wang , Li Tao , Weimin Ren , Xiaobing Lu , Wenzhen Zhang . Electrocarboxylation of Benzylic Phosphates and Phosphinates with Carbon Dioxide. Acta Physico-Chimica Sinica, 2024, 40(9): 2307008-0. doi: 10.3866/PKU.WHXB202307008
2. [2]
  Wei HE , Jing XI , Tianpei HE , Na CHEN , Quan YUAN . Application of solar-driven inorganic semiconductor-microbe hybrids in carbon dioxide fixation and biomanufacturing. Chinese Journal of Inorganic Chemistry, 2025, 41(1): 35-44. doi: 10.11862/CJIC.20240364
3. [3]
  Hui-Ying Chen , Hao-Lin Zhu , Pei-Qin Liao , Xiao-Ming Chen . Integration of Ru(Ⅱ)-Bipyridyl and Zinc(Ⅱ)-Porphyrin Moieties in a Metal-Organic Framework for Efficient Overall CO₂ Photoreduction. Acta Physico-Chimica Sinica, 2024, 40(4): 2306046-0. doi: 10.3866/PKU.WHXB202306046
4. [4]
  Yan Kong , Wei Wei , Lekai Xu , Chen Chen . Electrochemical Synthesis of Organonitrogen Compounds from N-integrated CO₂ Reduction Reaction. Acta Physico-Chimica Sinica, 2024, 40(8): 2307049-0. doi: 10.3866/PKU.WHXB202307049
5. [5]
  Qiang Zhang , Yuanbiao Huang , Rong Cao . Imidazolium-Based Materials for CO₂ Electroreduction. Acta Physico-Chimica Sinica, 2024, 40(4): 2306040-0. doi: 10.3866/PKU.WHXB202306040
6. [6]
  Yanhui Guo , Li Wei , Zhonglin Wen , Chaorong Qi , Huanfeng Jiang . Recent Progress on Conversion of Carbon Dioxide into Carbamates. Acta Physico-Chimica Sinica, 2024, 40(4): 2307004-0. doi: 10.3866/PKU.WHXB202307004
7. [7]
  Zhiquan Zhang , Baker Rhimi , Zheyang Liu , Min Zhou , Guowei Deng , Wei Wei , Liang Mao , Huaming Li , Zhifeng Jiang . Insights into the Development of Copper-Based Photocatalysts for CO₂ Conversion. Acta Physico-Chimica Sinica, 2024, 40(12): 2406029-0. doi: 10.3866/PKU.WHXB202406029
8. [8]
  Yi Fan , Zhuoqi Jiang , Zhipeng Li , Xuan Zhou , Jingan Lin , Laiying Zhang , Xu Hou . 偶极诱导液体门控可视化物质检测——化学“101计划”表界面性质应用实验新设计. University Chemistry, 2025, 40(8): 265-271. doi: 10.12461/PKU.DXHX202410061
9. [9]
  Bing WEI , Jianfan ZHANG , Zhe CHEN . Research progress in fine tuning of bimetallic nanocatalysts for electrocatalytic carbon dioxide reduction. Chinese Journal of Inorganic Chemistry, 2025, 41(3): 425-439. doi: 10.11862/CJIC.20240201
10. [10]
  Jianan Hong , Chenyu Xu , Yan Liu , Changqi Li , Menglin Wang , Yanwei Zhang . Decoding the interfacial competition between hydrogen evolution and CO₂ reduction via edge-active-site modulation in photothermal catalysis. Acta Physico-Chimica Sinica, 2025, 41(9): 100099-0. doi: 10.1016/j.actphy.2025.100099
11. [11]
  Bizhu Shao , Huijun Dong , Yunnan Gong , Jianhua Mei , Fengshi Cai , Jinbiao Liu , Dichang Zhong , Tongbu Lu . Metal-Organic Framework-Derived Nickel Nanoparticles for Efficient CO₂ Electroreduction in Wide Potential Windows. Acta Physico-Chimica Sinica, 2024, 40(4): 2305026-0. doi: 10.3866/PKU.WHXB202305026
12. [12]
  Jie ZHAO , Huili ZHANG , Xiaoqing LU , Zhaojie WANG . Theoretical calculations of CO₂ capture and separation by functional groups modified 2D covalent organic framework. Chinese Journal of Inorganic Chemistry, 2025, 41(2): 275-283. doi: 10.11862/CJIC.20240213
13. [13]
  Qianqian Liu , Xing Du , Wanfei Li , Wei-Lin Dai , Bo Liu . Synergistic Effects of Internal Electric and Dipole Fields in SnNb₂O₆/Nitrogen-Enriched C₃N₅ S-Scheme Heterojunction for Boosting Photocatalytic Performance. Acta Physico-Chimica Sinica, 2024, 40(10): 2311016-0. doi: 10.3866/PKU.WHXB202311016
14. [14]
  Zunxiang Zeng , Yuling Hu , Yufei Hu , Hua Xiao . Analysis of Plant Essential Oils by Supercritical CO₂Extraction with Gas Chromatography-Mass Spectrometry: An Instrumental Analysis Comprehensive Experiment Teaching Reform. University Chemistry, 2024, 39(3): 274-282. doi: 10.3866/PKU.DXHX202309069
15. [15]
  Heng Zhang . Determination of All Rate Constants in the Enzyme Catalyzed Reactions Based on Michaelis-Menten Mechanism. University Chemistry, 2024, 39(4): 395-400. doi: 10.3866/PKU.DXHX202310047
16. [16]
  Yuanqing Wang , Yusong Pan , Hongwu Zhu , Yanlei Xiang , Rong Han , Run Huang , Chao Du , Chengling Pan . Enhanced Catalytic Activity of Bi₂WO₆ for Organic Pollutants Degradation under the Synergism between Advanced Oxidative Processes and Visible Light Irradiation. Acta Physico-Chimica Sinica, 2024, 40(4): 2304050-0. doi: 10.3866/PKU.WHXB202304050
17. [17]
  Yingchun ZHANG , Yiwei SHI , Ruijie YANG , Xin WANG , Zhiguo SONG , Min WANG . Dual ligands manganese complexes based on benzene sulfonic acid and 2, 2′-bipyridine: Structure and catalytic properties and mechanism in Mannich reaction. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1501-1510. doi: 10.11862/CJIC.20240078
18. [18]
  Caixia Lin , Zhaojiang Shi , Yi Yu , Jianfeng Yan , Keyin Ye , Yaofeng Yuan . Ideological and Political Design for the Electrochemical Synthesis of Benzoxathiazine Dioxide Experiment. University Chemistry, 2024, 39(2): 61-66. doi: 10.3866/PKU.DXHX202309005
19. [19]
  Yuxin CHEN , Yanni LING , Yuqing YAO , Keyi WANG , Linna LI , Xin ZHANG , Qin WANG , Hongdao LI , Wenmin WANG . Construction, structures, and interaction with DNA of two Sm^Ⅲ₄ complexes. Chinese Journal of Inorganic Chemistry, 2025, 41(6): 1141-1150. doi: 10.11862/CJIC.20240258
20. [20]
  Huiying Xu , Minghui Liang , Zhi Zhou , Hui Gao , Wei Yi . Application of Quantum Chemistry Computation and Visual Analysis in Teaching of Weak Interactions. University Chemistry, 2025, 40(3): 199-205. doi: 10.12461/PKU.DXHX202407011

Get Citation

PDF

XML

Metrics

PDF Downloads(1)
Abstract views(826)
HTML views(156)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A Comparative Study on theNMR Relaxation of Methanol in Sub-and Super-Critical Mixtures of CO2 and Methanol

Metrics

通讯作者: 陈斌, bchen63@163.com

A Comparative Study on theNMR Relaxation of Methanol in Sub-and Super-Critical Mixtures of CO₂ and Methanol