Thermodynamic Properties of the First-Generation Hybrid Dendrimer with "Carbosilane Core/Phenylene Shell" Structure

• Published in: Entropy (Basel, Switzerland) Vol. 23; no. 12; p. 1557
• Main Authors: 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
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 23-11-2021; MDPI
• Subjects: adiabatic calorimetry; Catalysis; Composite materials; Decomposition; Dendrimers; DSC; Enthalpy; Entropy of formation; glass transition; Glass transition temperature; Heat; heat capacity; hybrid dendrimers; Investigations; Molecular structure; Resistance thermometers; Specific heat; Temperature; thermodynamic functions; Thermodynamic properties; heat capacity; adiabatic calorimetry; thermodynamic functions; hybrid dendrimers; glass transition; DSC
• ISSN: 1099-4300; 1099-4300
• 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.