Sologubov Semen S, Markin Alexey V, Smirnova Natalia N, Chamkina Elena S, Krasnova Irina Yu, Milenin Sergey A, Serenko Olga A, Shifrina Zinaida B, Muzafarov Aziz M
Chemistry Department, National Research Lobachevsky State University of Nizhny Novgorod, 23/5 Gagarin Av., 603950 Nizhny Novgorod, Russia.
Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilov St., 119334 Moscow, Russia.
Entropy (Basel). 2021 Nov 23;23(12):1557. doi: 10.3390/e23121557.
The molar heat capacity of the first-generation hybrid dendrimer with a "carbosilane core/phenylene shell" structure was measured for the first time in the temperature range = 6-600 K using a precise adiabatic vacuum calorimeter and DSC. In the above temperature interval, the glass transition of the studied compound was observed, and its thermodynamic characteristics were determined. The standard thermodynamic functions (the enthalpy, the entropy, and the Gibbs energy) of the hybrid dendrimer were calculated over the range from = 0 to 600 K using the experimentally determined heat capacity. The standard entropy of formation of the investigated dendrimer was evaluated at = 298.15 K. The obtained thermodynamic properties of the studied hybrid dendrimer were compared and discussed with the literature data for some of the first-generation organosilicon and pyridylphenylene dendrimers.
首次使用精密绝热真空量热计和差示扫描量热法（DSC）在6 - 600 K的温度范围内测量了具有“碳硅烷核/亚苯基壳”结构的第一代混合树枝状大分子的摩尔热容。在上述温度区间内，观察到了所研究化合物的玻璃化转变，并确定了其热力学特性。利用实验测定的热容，计算了混合树枝状大分子在0至600 K范围内的标准热力学函数（焓、熵和吉布斯自由能）。在298.15 K下评估了所研究树枝状大分子的标准生成熵。将所获得的研究混合树枝状大分子的热力学性质与一些第一代有机硅和吡啶基亚苯基树枝状大分子的文献数据进行了比较和讨论。
