Novel Silsesquioxane-Derived Boronate Esters—Synthesis and Thermal Properties

Abstract

The functionalization of mono- and octahydrospherosilicate with vinylboranes and allylboranes via hydrosilylation reaction in the presence of a Karstedt’s platinum (0) catalyst is presented. This is the catalytic route to obtain a new class of silsesquioxanes containing boron atoms in their structure in high yields (>90%) and with satisfactory selectivity. The obtained compounds were fully characterized by spectroscopic (1H, 13C, 29Si NMR) and spectrometric methods (MALDI-TOF-MS), as well as thermal analysis (TGA). The obtained compounds were subjected to thermal tests, characterizing the processes of melting, thermal evaporation, sublimation and thermal decomposition.

New Ethynylphenylborasilsesquioxanes—Their Reactivity and Behavior during Thermal Decomposition

“…In this work, we synthesized mono- and diethynylphenylborasilsesquioxane by the condensation reaction. Furthermore, this is a continuation of our team’s previous work on thermally inducted chemical and structural transformations of silsesquioxanes and heterosilsesquioxanes [ 7 , 39 , 40 , 41 , 42 ].…”

Click Addition Reaction of Urethane–Acrylate Resin Using Octa(3-thiopropyl)silsesquioxane Derivatives as Cross-Linking Agents

“…Figure 4 show the mass change and DTG curves. Determining the mechanism of thermal degradation of silsesquioxanes may be difficult due to the complex structures of the compounds [52,53]. Thermal measurements allow for estimating the influence of functional groups on the thermal stability of compounds.…”

Silane‐Bearing Borasilsesquioxanes: Synthetic Protocol and Unsuspected Redistribution Reactions

“…In our previous research, we studied the reactions of obtaining silsesquioxane derivatives from unsaturated boranes in a form of vinyl‐ and allylboronates by hydrosilylation with Si−H moiety‐bearing mono‐ and octaspherosilicates catalyzed by Karstedt's catalyst. High conversion of substrates prompted us to obtain new borasilsesquioxane derivatives in a hydrosilylation reaction with commercially available compounds containing Si−H groups by a reverse approach [37] …”

“…High conversion of substrates prompted us to obtain new borasilsesquioxane derivatives in a hydrosilylation reaction with commercially available compounds containing SiÀ H groups by a reverse approach. [37] The aim of this work was to synthesize and characterize substituted mono-and diphenylborasilsesquioxane derivatives by catalytic hydrosilylation. The obtained compounds were fully analyzed by spectroscopic methods ( 1 H, 13 C, 29 Si NMR) as well as spectrometric analysis (MALDI-TOF-MS), determining the potential directions of their future application as boron-containing dopants for materials chemistry and engineering.…”