| 聚芳醚酮单体分子与分子极化的13C NMR研究 |
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| 引用本文： | 杨扬船,华士英.聚芳醚酮单体分子与分子极化的13C NMR研究[J].波谱学杂志,1996,13(2):137-144. |
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| 作者姓名： | 杨扬船 华士英 |
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| 作者单位： | 1. 吉林大学化学系, 长春 130023;2. 吉林大学理论化学研究所, 长春 130023 |
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| 基金项目： | 国家“863”重大项目课题 |
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| 摘 要： | 为弄清聚芳醚酮单体在硫酸中变色(红)现象,通过13C NMR研究了它们在CDCl3、CDCl3+DMSO-d6和H2SO4的13C谱化学位移及氟端基偶合情况.研究表明:这些单体溶于硫酸时,羰基碳弛豫时间缩短化学位移增加,而与羰基相连的季碳弛豫时间减小化学位移也减少.据此,首次提出硫酸使这些单体极化的机理为正极性磺酸基使羰基发生电子离城,变温13C谱对此进行了验证.
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| 关 键 词： | 聚芳醚酮单体 13C NMR 极化 弛豫 |
| 收稿时间： | 1995-07-04 |
STUDY ON THE MOLECULAR STRUCTURE AND POLARIZATION OF MONOMERS FOR POLY (ARYL ETHER KETONE)s BY 13C NMR |
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| Ke Yangchuan, Hua Shiyin, Zhen Yubin and Wu Zhongwen.STUDY ON THE MOLECULAR STRUCTURE AND POLARIZATION OF MONOMERS FOR POLY (ARYL ETHER KETONE)s BY 13C NMR[J].Chinese Journal of Magnetic Resonance,1996,13(2):137-144. |
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| Authors: | Ke Yangchuan Hua Shiyin Zhen Yubin and Wu Zhongwen |
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| Institution: | 1. Department of Chemistry, Jilin University, Changchun 130023;2. Institute of Theoretical Chemistry, Changchun 130023 |
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| Abstract: | To clarify the reason for the red solution of poly(aryl ether ketone), monomers in H2SO4, this paper had studied their chemical shifts and florine-ended dipolarity in solvents of CDCl3, CDCl3+DMSO-d6 and H2SO4, results showed that, when the monomers in H2SO4, their carbonyl carbon relaxation time was shortened and their chemical shifts increased, While the chemical shift of the quarternary carbon attached to carbonyl group was reduced and relaxation time shortened. Based on the above, the polarization mechanism of H2SO4 on these monomers is presented for the first time,that is, the sulfo group made electrons in carbonyl group delocalized, which was further proved by 13C NMR under variation temperature. |
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| Keywords: | Monomers of poly(aryl ether ketone)s 13C NMR Polarization Relaxation |
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