...
首页> 外文期刊>Journal of Physics. Condensed Matter >Molecular dynamics of branched hexaalkyl hexa-peri-hexabenzocoronenes
【24h】

Molecular dynamics of branched hexaalkyl hexa-peri-hexabenzocoronenes

机译:支链六烷基六-peri-六苯并甲酮的分子动力学

获取原文
获取原文并翻译 | 示例
           

摘要

The molecular dynamics of discotic liquid crystalline hexa-peri-hexabenzocoronenes (HBC-C-10,C-6 and HBC-C-14,C-10) with long alkyl side chains branched in close vicinity to the HBC aromatic core were studied by dielectric spectroscopy. The two compounds display a weak dipolar relaxation (a-process) manifested by a Vogel-Fulcher-Tammann (VFT) dependence and have almost the same glass temperature (similar to 215 K) in excellent agreement with the value from differential scanning calorimetry. The origin of this process is the freezing of the in-plane disc rotation. Controlled experiments revealed that the weak dipole moment associated with the a-process is due to oxidation.
机译:研究了盘状液晶六-per-hexabenzocoronenes(HBC-C-10,C-6和HBC-C-14,C-10)的分子动力学,该烷基具有靠近HBC芳香核分支的长烷基侧链。介电谱。这两种化合物显示出弱的偶极弛豫(a-过程),表现为Vogel-Fulcher-Tammann(VFT)依赖性,并且具有几乎相同的玻璃温度(类似于215 K),与差示扫描量热法的值非常吻合。该过程的起源是平面内光盘旋转的冻结。对照实验表明,与a过程相关的弱偶极矩是由于氧化引起的。

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