Citation: NI Shaoru, SHEN Lianfang, YU Fusheng, QIAN Baogong. CARBON-13 NMR STUDY OF MOLECULAR MOTION OF 1, 2-POLYBUTADIENES IN SOLUTION Ⅰ. STRUCTURE DEPENDENCE OF MOLECULAR MOTIOM[J]. Chinese Journal of Polymer Science, ;1986, 4(1): 8-16. shu

CARBON-13 NMR STUDY OF MOLECULAR MOTION OF 1, 2-POLYBUTADIENES IN SOLUTION Ⅰ. STRUCTURE DEPENDENCE OF MOLECULAR MOTIOM

Received Date: 10 November 1983

Proton decoupled, partially relaxed, Fourier-transform 50.3 MHz carbon-13 NMR in natural abundance was used to determine spin-lattice times (T1) and nuclear Overhauser enhancement fac-tors (NOE) of individual carbon of a serics of 1,2-polybutadienes with different structures in solutionin CDCl2. The structure dependence of molecular metion and the internal motion of vinyl group in 1,2-polybutadiene have been studied by nT1 and NOE values. The nT1 values of the carbons in cis-1,4-units are the highest and those of the carbons in 1,2-units are the lowest in three types of units in 1,2-polybutadiene.The nT1 values of carbons in the same unit become greater when the adjacent 1,2-units are replaced by 1,4-units,and nT1 values of the carbons in all units decrease sharply with the increase of content of 1,2-units in the polymers.The fact that nT1 values of —CH=are larger than those of =CH2 in vinyl group implies that there are complex internal motions of vinyl group.It is shown by calculation that the dominant factor causing the difference in nT1 of—CH=and=CH2 in vinyl group is a swing of vinyl group in a plane perpendicular to the chain backbone.
1. [1]
  Fang-Yuan Chen , Wen-Chao Geng , Kang Cai , Dong-Sheng Guo . Molecular recognition of cyclophanes in water. Chinese Chemical Letters, 2024, 35(5): 109161-. doi: 10.1016/j.cclet.2023.109161
2. [2]
  Keke Han , Wenjun Rao , Xiuli You , Haina Zhang , Xing Ye , Zhenhong Wei , Hu Cai . Two new high-temperature molecular ferroelectrics [1,5-3.2.2-Hdabcni]X (X = ClO₄⁻, ReO₄⁻). Chinese Chemical Letters, 2024, 35(6): 108809-. doi: 10.1016/j.cclet.2023.108809
3. [3]
  Xinzhi Ding , Chong Liu , Jing Niu , Nan Chen , Shutao Xu , Yingxu Wei , Zhongmin Liu . Solid-state NMR study of the stability of MOR framework aluminum. Chinese Journal of Structural Chemistry, 2024, 43(4): 100247-100247. doi: 10.1016/j.cjsc.2024.100247
4. [4]
  Yan Cheng , Hua-Peng Ruan , Yan Peng , Longhe Li , Zhenqiang Xie , Lang Liu , Shiyong Zhang , Hengyun Ye , Zhao-Bo Hu . Magnetic, dielectric and luminescence synergetic switchable effects in molecular material [Et₃NCH₂Cl]₂[MnBr₄]. Chinese Chemical Letters, 2024, 35(4): 108554-. doi: 10.1016/j.cclet.2023.108554
5. [5]
  Caihong Mao , Yanfeng He , Xiaohan Wang , Yan Cai , Xiaobo Hu . Synthesis and molecular recognition characteristics of a tetrapodal benzene cage. Chinese Chemical Letters, 2024, 35(8): 109362-. doi: 10.1016/j.cclet.2023.109362
6. [6]
  Cheng-Da Zhao , Huan Yao , Shi-Yao Li , Fangfang Du , Li-Li Wang , Liu-Pan Yang . Amide naphthotubes: Biomimetic macrocycles for selective molecular recognition. Chinese Chemical Letters, 2024, 35(4): 108879-. doi: 10.1016/j.cclet.2023.108879
7. [7]
  Zhenchun Yang , Bixiao Guo , Zhenyu Hu , Kun Wang , Jiahao Cui , Lina Li , Chun Hu , Yubao Zhao . Molecular engineering towards dual surface local polarization sites on poly(heptazine imide) framework for boosting H₂O₂ photo-production. Chinese Chemical Letters, 2024, 35(8): 109251-. doi: 10.1016/j.cclet.2023.109251
8. [8]
  Zhimin Sun , Xin-Hui Guo , Yue Zhao , Qing-Yu Meng , Li-Juan Xing , He-Lue Sun . Dynamically switchable porphyrin-based molecular tweezer for on−off fullerene recognition. Chinese Chemical Letters, 2024, 35(6): 109162-. doi: 10.1016/j.cclet.2023.109162
9. [9]
  Li Lin , Song-Lin Tian , Zhen-Yu Hu , Yu Zhang , Li-Min Chang , Jia-Jun Wang , Wan-Qiang Liu , Qing-Shuang Wang , Fang Wang . Molecular crowding electrolytes for stabilizing Zn metal anode in rechargeable aqueous batteries. Chinese Chemical Letters, 2024, 35(7): 109802-. doi: 10.1016/j.cclet.2024.109802
10. [10]
  Minghao Hu , Tianci Xie , Yuqiang Hu , Longjie Li , Ting Wang , Tongbo Wu . Allosteric DNAzyme-based encoder for molecular information transfer. Chinese Chemical Letters, 2024, 35(7): 109232-. doi: 10.1016/j.cclet.2023.109232
11. [11]
  Chuan-Zhi Ni , Ruo-Ming Li , Fang-Qi Zhang , Qu-Ao-Wei Li , Yuan-Yuan Zhu , Jie Zeng , Shuang-Xi Gu . A chiral fluorescent probe for molecular recognition of basic amino acids in solutions and cells. Chinese Chemical Letters, 2024, 35(10): 109862-. doi: 10.1016/j.cclet.2024.109862
12. [12]
  Ling-Hao Zhao , Hai-Wei Yan , Jian-Shuang Jiang , Xu Zhang , Xiang Yuan , Ya-Nan Yang , Pei-Cheng Zhang . Effective assignment of positional isomers in dimeric shikonin and its analogs by ¹H NMR spectroscopy. Chinese Chemical Letters, 2024, 35(5): 108863-. doi: 10.1016/j.cclet.2023.108863
13. [13]
  Qihan Lin , Jiabin Xing , Yue-Yang Liu , Gang Wu , Shi-Jia Liu , Hui Wang , Wei Zhou , Zhan-Ting Li , Dan-Wei Zhang . taBOX: A water-soluble tetraanionic rectangular molecular container for conjugated molecules and taste masking for berberine and palmatine. Chinese Chemical Letters, 2024, 35(5): 109119-. doi: 10.1016/j.cclet.2023.109119
14. [14]
  Zhikang Wu , Guoyong Dai , Qi Li , Zheyu Wei , Shi Ru , Jianda Li , Hongli Jia , Dejin Zang , Mirjana Čolović , Yongge Wei . POV-based molecular catalysts for highly efficient esterification of alcohols with aldehydes as acylating agents. Chinese Chemical Letters, 2024, 35(8): 109061-. doi: 10.1016/j.cclet.2023.109061
15. [15]
  Jinyan Zhang , Fen Liu , Qian Jin , Xueyi Li , Qiong Zhan , Mu Chen , Sisi Wang , Zhenlong Wu , Wencai Ye , Lei Wang . Discovery of unusual phloroglucinol–triterpenoid adducts from Leptospermum scoparium and Xanthostemon chrysanthus by building blocks-based molecular networking. Chinese Chemical Letters, 2024, 35(6): 108881-. doi: 10.1016/j.cclet.2023.108881
16. [16]
  Zixi Zou , Jingyuan Wang , Yian Sun , Qian Wang , Da-Hui Qu . Controlling molecular assembly on time scale: Time-dependent multicolor fluorescence for information encryption. Chinese Chemical Letters, 2024, 35(7): 108972-. doi: 10.1016/j.cclet.2023.108972
17. [17]
  Ruonan Guo , Heng Zhang , Changsheng Guo , Ningqing Lv , Beidou Xi , Jian Xu . Degradation of neonicotinoids with different molecular structures in heterogeneous peroxymonosulfate activation system through different oxidation pathways. Chinese Chemical Letters, 2024, 35(9): 109413-. doi: 10.1016/j.cclet.2023.109413
18. [18]
  Runze Liu , Yankai Bian , Weili Dai . Qualitative and quantitative analysis of Brønsted and Lewis acid sites in zeolites: A combined probe-assisted 1H MAS NMR and NH3-TPD investigation. Chinese Journal of Structural Chemistry, 2024, 43(4): 100250-100250. doi: 10.1016/j.cjsc.2024.100250
19. [19]
  Wei-Yu Zhou , Zi-Han Xi , Ning-Ning Du , Li Ye , Ming-Hao Jiang , Jin-Le Hao , Bin Lin , Guo-Dong Yao , Xiao-Xiao Huang , Shao-Jiang Song . Rapid discovery of two unprecedented meroterpenoids from Daphne altaica Pall. using molecular networking integrated with MolNetEnhancer and Network Annotation Propagation. Chinese Chemical Letters, 2024, 35(8): 109030-. doi: 10.1016/j.cclet.2023.109030
20. [20]
  Hualei Xu , Manman Han , Haiqiang Liu , Liang Qin , Lulu Chen , Hao Hu , Ran Wu , Chenyu Yang , Hua Guo , Jinrong Li , Jinxiang Fu , Qichen Hao , Yijun Zhou , Jinchao Feng , Xiaodong Wang . 4-Nitrocatechol as a novel matrix for low-molecular-weight compounds in situ detection and imaging in biological tissues by MALDI-MSI. Chinese Chemical Letters, 2024, 35(6): 109095-. doi: 10.1016/j.cclet.2023.109095

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(477)
HTML views(7)

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

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return