私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:天津市津南區海河教育園雅觀路135號天津大學北洋園校區
  • 郵編:300350
  • 電話:13389937396
  • 傳真:
  • Email:zhouxueqin@tju.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Structure-supercooling property relationship of phenylethyl phenylacetate derivatives and analogue
作者:Simin Liu, Defei Yin, Wei Li, Dongzhi Liu, Xueqin Zhou
關鍵字:Synthesis,Supercooled liquid, Phase transition, Dihedral angle, Heat preservation
論文來源:期刊
具體來源:Journal of Molecular Structure
發表時間:2021年
In this paper, three new compounds were synthesized by introduction of benzyloxy group to phenylethyl phenylacetate (PPA) and shorting the flexible ester linker. NMR spectra and mass spectra are achieved to confirm the structure of the compounds. The solid-liquid and liquid-solid phase change behaviors of PPA and these three compounds were explored by direct observation and differential scanning calorimetry (DSC) measurements. It was found that all four compounds would form supercooled liquids during a heating-cooling cycle. The supercooling degree is as large as 44 °C or above. The effects of benzyloxy group and the flexible linker on the phase transition processes as well as the supercooling degrees were discussed in detail with the computational optimized geometry of isolated molecules. It was revealed that the dihedral angles between adjacent phenyl rings play a significant role in tuning their phase transition temperatures. This work also discovers the high enthalpies of PPA derivatives and analogues in both solid-liquid and liquid-solid phase transition processes, making them great potentials for the thermal energy control of appropriate working temperature regions.
主站蜘蛛池模板: 谢通门县| 专栏| 阳西县| 孙吴县| 卢湾区| 襄樊市| 乳山市| 固始县| 湘潭县| 错那县| 广州市| 绩溪县| 疏勒县| 绍兴市| 石楼县| 凤台县| 屏东市| 怀集县| 永顺县| 阜宁县| 海丰县| 麦盖提县| 旬阳县| 大洼县| 紫云| 临沂市| 泽普县| 遵义县| 龙岩市| 重庆市| 镇雄县| 马关县| 布拖县| 井陉县| 健康| 沂源县| 防城港市| 航空| 阿鲁科尔沁旗| 闻喜县| 高清|