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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (14): 1293-1297. 上一篇    下一篇

研究论文

DMA水溶液的1H NMR研究

朱龙华*1，平磊1，雷毅2   

  1. (1 中国计量学院生命科学学院 杭州 310018)
    (2 浙江大学化学系 杭州 310027)
  • 投稿日期:2004-06-15 修回日期:2005-03-21 发布日期:2010-12-10
  • 通讯作者: 朱龙华

1H NMR Studies of Aqueous N,N-Dimethylacetamide Solutions

ZHU Long-Hua*1, PING Lei1, LEI Yi2   

  1. (1 College of Life Sciences, China Jiliang University, Hangzhou 310018)
    (2 Department of Chemistry, Zhejiang University, Hangzhou 310027)
  • Received:2004-06-15 Revised:2005-03-21 Published:2010-12-10
  • Contact: ZHU Long-Hua

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测量了N,N-二甲基乙酰胺(DMA)水溶液体系不同温度下全浓度范围的1H NMR数据, 对体系中的缔合情况进行了讨论, 应用化学缔合模型求得了各缔合平衡常数K和缔合平衡的ΔH. 结合N,N-二甲基甲酰胺(DMF)和N-甲基乙酰胺(NMA)水溶液的研究结果, 发现酰胺自身结构和酰胺浓度是影响酰胺水溶液性质的主要因素.

关键词: DMA, DMF, NMA, 水, 缔合, 1H NMR

1H NMR of aqueous N,N-dimethylacetamide (DMA) solutions was measured at different temperatures. Based on chemical association model, the association equilibrium constant K and the corresponding ΔH were obtained. In addition, these results were compared with those of aqueous dimethylformamide and N-methylacetamide solutions. It was found that the effect of the amides on the structure of water was very dependent upon solution composition and the intrinsic molecular structure of the amide.

Key words: N,N-dimethylacetamide (DMA), dimethylformamide (DMF), N-methylacetamide (NMA), water, association, 1H NMR