Abstract

Two third generation liquid-crystalline dendrimers, poly(propyleneimine) derivatives with 3,4-bis(decyloxy)benzoic moieties at the periphery, were prepared, and their thermodynamic properties were studied. The formation of a columnar mesophase was verified by differential scanning calorimetry (DSC) and polarizing optical microscopy. It was for the first time that the specific heat capacity and magnetocaloric effect (MCE) of the iron complex G3-K2.10 ∙ (FeCl₂)₁₅ in the temperature 288–350 K in magnetic fields varying from 0 to 1.0 T were determined. The temperature-dependent specific heat capacity of the complexes in the range 210–460 K was measured on a differential scanning calorimeter and an original design microcalorimeter. The temperature-dependent heat capacity and magnetocaloric effect are extreme functions.

中文翻译：

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介晶的第三代聚丙烯亚胺树枝状聚合物及其铁（II）配合物的相变

摘要

制备了两种第三代液晶树状聚合物，即在外围具有3,4-双（癸氧基）苯甲酸部分的聚（亚丙基亚胺）衍生物，并研究了它们的热力学性质。柱状中间相的形成通过差示扫描量热法（DSC）和偏振光学显微镜检查得到证实。铁配合物G3-K2.10∙（FeCl ₂）₁₅的比热容和磁热效应（MCE）首次出现在288-350 K的温度范围内，测定了0至1.0 T的磁场。在差示扫描量热仪和原始设计的量热仪上测量了复合物在210–460 K范围内与温度有关的比热容。与温度有关的热容和磁热效应是极端功能。