Wydział Chemii

Mateusz Janeta

Sławomir Szafert

2017

Journal of Organometallic Chemistry

847

173-183

10.1016/j.jorganchem.2017.05.044

Naukowa

Angielski

Artykuł

Four new homosubstituted amido-functionalized polyoctahedral oligomeric silsesquioxanes 6-X (X = F, Cl, Br, I) have been synthesized using Sandmeyer approach with 37–52% yields from a new diazo POSS precursor 5-OTs. Compounds were characterized by spectroscopic methods including ²⁹Si NMR spectroscopy, X-ray crystallography (for 6-Br), and mass spectrometry. They were extensively studied by TG and DTA techniques in flowing nitrogen and synthetic air atmospheres. Experiments were performed in the 30–1000 °C range and showed different behavior depending on the atmosphere. The residual masses obtained at different temperatures were analyzed using IR to get insight into the thermal degradation mechanism. Additionally, activation energies of the decomposition process using Kissinger method were calculated for 6-X and its non-halogenated analog 2.

polyhedral oligomeric silsesquioxanes, silsesquioxane, sandmeyer, thermal degradation, kissinger method, activation energy

https://doi.org/10.1016/j.jorganchem.2017.05.044

http://www.elsevier.com