Hydrogen-Bonding-Directed Template Synthesis of Novel Stereo-Regular Organo-Bridged Ladder-Like Polymethylsiloxane

Abstract

A novel stereo-regular organo-bridged ladder-like polymethylsiloxane (LPMS) was synthesized by a stepwise coupling polymerization on the basis of an amido H-bonding-assisted self-assembling template. The monomer N,N′-bis{4-[3-(diethoxymethylsilyl)propoxy]-phenyl}terephthalamide (M), prepared by hydrosilylation reaction at high temperature, was hydrolyzed in a dilute solution at a low temperature to form a ladder-like supramolecular intermediate through amido H-bonding interactions, which was further condensed to form the polymer LPMS. A combination of techniques including 1H NMR, 29Si NMR, and FT-IR spectroscopies X-ray diffraction (XRD), and differential scanning calorimetry (DSC) were used to characterize the titled polymer LPMS, and the results indicate that the polymer possesses an ordered ladder-like structure. 29Si NMR spectrum of the polymer LPMS.