Slick Synthetic Approach to Various Fluoroalkyl Silsesquioxanes—Assessment of their Dielectric Properties

Autor: Julia Duszczak, Katarzyna Mituła, Monika Rzonsowska, Paweł Ławniczak, Rafał Januszewski, Bartłomiej Szarłan, Beata Dudziec
Rok vydání: 2022
Předmět:
Zdroj: Materials; Volume 15; Issue 24; Pages: 8997
ISSN: 1996-1944
DOI: 10.3390/ma15248997
Popis: We present a smart and efficient methodology for the synthesis of a variety of fluorinated silsesquioxanes (SQs) with diverse Si-O-Si core architecture. The protocol is based on an easy-to-handle and selective hydrosilylation reaction. An investigation on the placement of the reactive Si-HC=CH2 vs. Si-H in the silsesquioxane, as well as silane vs. olefin structure, respectively, on the progress and selectivity of the hydrosilylation process, was studied. Two alternative synthetic pathways for obtaining a variety of fluorine-functionalized silsesquioxanes were developed. As a result, a series of mono- and octa- T8 SQs, tri- ‘open-cage’ T7 SQs, in addition to di- and tetrafunctionalized double-decker silsesquioxane (DDSQ) derivatives, were obtained selectively with high yields. All products were characterized by spectroscopic (NMR, FTIR) techniques. Selected samples were subjected to the measurements revealing their dielectric permittivity in a wide range of temperatures (from −100 °C to 100 °C) and electric field frequencies (100–106 Hz).
Databáze: OpenAIRE
Nepřihlášeným uživatelům se plný text nezobrazuje
Pro tento záznam nejsou dostupné žádné jednotky.