1-ethyl-3-methyl-4-vinylimidazolium triflate | 1417201-45-6

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 有机磺酸及其衍生物
• 英文名称: 1-ethyl-3-methyl-4-vinylimidazolium triflate
• CAS: 1417201-45-6
• 化学式: CF₃O₃S*C₈H₁₃N₂
• 分子量: 286.275
• InChiKey: HHGZZBITNUTBOV-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  1.03
• 重原子数：
  18.0
• 可旋转键数：
  2.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  66.01
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  1-三甲基甲硅烷基-4-乙烯基咪唑 在 水 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 2.5h， 生成 1-ethyl-3-methyl-4-vinylimidazolium triflate
  参考文献：
  名称：

  Imidazole Polymers Derived from Ionic Liquid 4-Vinylimidazolium Monomers: Their Synthesis and Thermal and Dielectric Properties

  摘要：

  The synthesis of 1-ethyl-3-methyl-4-vinylimidazolium triflate, its polymerization, and ion exchange to yield a family of 4-imidazolium polymers with a variety of anions are described. For comparative purposes, the synthesis, polymerization, and ion exchange of an analogous set of 1-vinylimidazolium polymers are also presented. The comparative thermal and dielectric characteristics of the 4-vinyl-and 1-vinylimidazolium salts were evaluated. The trends in the glass transition (T-g) characteristics of the various 4-vinylimidazolium and 1-vinylimidazolium polymers were similar; however, the glass transition temperatures of poly(4-vinylimidazolium) BF4- PF6-, AsF6-, and CF3SO3- salts were significantly higher than those of the corresponding poly(1-vinylimidazolium) salts. This difference and the increase in T-g in going from BF4- to AsF6- in the 4-vinylimidazolium series were attributed to enhanced intramolecular bridging between imidazolium moieties positioned 1,3 or 1,5 along the polymer chain. In the dielectric spectra of I-vinylimidazolium salts at temperatures in excess of 30 degrees C, one relaxation mode distinct from that for electrode polarization is observed. The single mode appears to correspond to the alpha-relaxation peak in poly(3-ethyl-1-vinylimidazolium salts) recently identified and attributed to ion-pair motion by Nakamura et al. In the 4-vinylimidazolium polymer spectra set, at temperatures in excess of 30 degrees C, two relaxation modes, distinct from that for electrode polarization, are apparent: the alpha peak also observed in the 1-vinylimidazolium polymer set and a new relaxation peak observed at lower frequency. The lower frequency relaxation peak is identified in this work as the alpha'-relaxation and is also associated with ion-pair motion. Assuming the relaxation processes to be Arrhenius in nature, the activation energy of the alpha-relaxation in poly(4-vinylimidazolium) BF4-, PF6-, CF3SO3-, TFSI-, and C2N3- salts ranged from 83 to 28 kJ/mol and appears to scale with the glass transition temperature.

  DOI：

  10.1021/ma300862t