Synthesis of Perfluoroalkyl Siloxane with C˭C and C‒C Bridged Groups Through Single Electron Transfer Reaction

GRAPHICAL ABSTRACT

Abstract

The sodium dithionite–initiated reaction of perfluoroalkyl iodides with vinylsiloxane in an acetonitrile–water mixture efficiently proceeded under mild conditions. As a result, the perfluoroalkyl groups were bonded onto C˭C on the end-position or side-chain of the siloxane. The subsequent elimination or reduction of the C‒I bridged groups produced the corresponding R_fCH˭CH‒ or R_fCH₂CH₂− substituted group on siloxane. All fluorosiloxanes were characterized by FT-IR, ¹H NMR, ¹⁹F NMR, and EI-MS. The morphology and microstructures of the fluorosiloxane films were further observed by atomic force microscopy and X-ray photoelectron microscope.

Keywords:

• Perfluoroalkyl siloxane
• single electron transfer
• bridged groups
• film morphology research