• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >X-ray Diffraction Studies oon Mesophases of Cetyl-and Dodecyltrimethylammoniumbromide in Liquid Ammonia
【24h】

X-ray Diffraction Studies oon Mesophases of Cetyl-and Dodecyltrimethylammoniumbromide in Liquid Ammonia

机译：液氨中十六烷基和十二烷基三甲基溴化铵的中间相的X射线衍射研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We have studied solutions of the surfactants cetyltrimethylammoniumbromide (CTAB) and dodecyltrimethylammoniumbromide (DTAB) in liquid ammonia with respect to the formation of lyotropic phases. For this purpose, a set-up for performing X-ray scattering experiments at temperatures up to 120 deg C on samples containing liquid ammonia has been developed. Both systems form hexagonal and mono-clinic lyotropic phases above the dissolving temperature of the surfactant, thus representing the first examples for lyotropic phases in liquid ammonia, and for monoclinic phases in nonaqueous solvents. The phase diagrams of CTAB/liquid NH_3 and DTAB/liquid NH_3 show similarities to their respective aqueous systems. However, the regions of existence of monoclinic phases are much larger in the ammonia system, while the cubic phases, as observedin the water based systems, do not seem to exist. The liquid-crystalline phases found provide potentailly for preparing mesoporous nitride-based solids.
机译：我们已经研究了液氮中表面活性剂十六烷基三甲基溴化铵（CTAB）和十二烷基三甲基溴化铵（DTAB）的溶液，以形成溶致相。为此目的，已经开发出了一种用于在高达120摄氏度的温度下对含液态氨的样品进行X射线散射实验的装置。两种体系均在高于表面活性剂的溶解温度时形成六方和单斜晶的液溶相，因此代表了液氨中的单晶相和非水溶剂中的单斜晶相的第一个实例。 CTAB /液态NH_3和DTAB /液态NH_3的相图显示出与它们各自的水性体系相似之处。但是，氨系统中单斜相的存在区域要大得多，而水基系统中所观察到的立方相似乎不存在。发现的液晶相可用于制备介孔氮化物基固体。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号