• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Open Crystallography Journal >Electrical Behaviour of Twist Grain Boundary Phases of 4-n-dodecyloxy-4'-(cholesteryloxycarbonyl-1-butyloxy) chalcone
【24h】

Electrical Behaviour of Twist Grain Boundary Phases of 4-n-dodecyloxy-4'-(cholesteryloxycarbonyl-1-butyloxy) chalcone

机译：4-正十二烷氧基-4'-（胆固醇氧羰基-1-丁氧基）查尔酮的扭曲晶界相的电学行为

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There are only few compounds, which have shown wide temperature range twist grain boundary (TGB) phases.One such compound is the cholesterol derived, 4-n-dodecyloxy-4'-(cholesteryloxycarbonyl-1-butyloxy) chalcone, whichshows a wide temperature range TGBA (~ 11 °C) and TGBC* (~ 19 °C). In the present work, we are reporting thetemperature and frequency dependence of the dielectric parameters of the above compound for two different conditions ofmolecular anchoring i.e. planar and homeotropic. The dielectric studies have been carried out in the frequency range of 1Hz to 35 MHz. In homeotropically aligned sample, the experimental dielectric spectra display a feeble relaxation mode inTGBA and TGBC* phases in MHz frequency range. Planar oriented molecules show a soft mode like relaxation due to thetilt fluctuation of molecules in MHz region for both the TGB phases and support theoretical formulation for the soft moderelaxation of the TGB phases. Various dielectric parameters have been determined for the two TGB phases of the abovementioned compound.
机译：仅有很少的化合物显示出宽温度范围的扭曲晶界（TGB）相，其中一种是胆固醇衍生的4-n-十二烷基氧基-4'-（胆甾醇氧基羰基-1-丁氧基）查耳酮，具有宽温度范围范围TGBA（〜11°C）和TGBC *（〜19°C）。在目前的工作中，我们报道了在两种不同的分子锚固条件下，即平面和垂直，上述化合物的介电参数对温度和频率的依赖性。介电研究已在1Hz至35 MHz的频率范围内进行。在垂直排列的样品中，实验介电谱在MHz频率范围的TGBA和TGBC *相中显示出微弱的弛豫模式。平面取向的分子由于两个TGB相在MHz区域内的分子的倾斜波动而表现出像弛豫的软模，并且支持TGB相的软模松弛的理论表述。已经确定了上述化合物的两个TGB相的各种介电参数。

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