Synthesis of a multifunctional alkoxysiloxane oligomer

Masashi Yoshikawa, Ryutaro Wakabayashi, Misa Tamai, Kazuyuki Kuroda

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

An alkoxysiloxane oligomer (1, SiMe[OSi(CHCH2)(OMe)2][OSi(CH2)3Cl(OMe)2]2), containing vinyl and chloropropyl groups, was synthesized as a precursor for sol-gel synthesis. Di-tert-butoxymethylhydroxysilane (t-BuO)2MeSiOH was reacted with (MeO)2(CH2CH)SiCl to form (t-BuO)2MeSiOSi(CHCH2)(OMe)2 which was further alkoxysilylated with Cl(CH2)3SiCl(OMe)2 to form 1. The 1H, 13C, 29Si NMR and HR-MS data confirmed the formation of 1, indicating the successful synthesis of an alkoxysiloxane oligomer possessing different kinds of functional groups by a chemoselective route. Hydrolysis of 1 under acidic conditions was completed in a few hours. The solution state 29Si NMR spectra of samples hydrolyzed and condensed at various reaction times show no signals due to species generated by the cleavage of the siloxane bonds in 1, indicating the validity of the synthesized substance as a precursor for the formation of hybrids with homogeneously distributed functional groups. Intramolecular condensation of 1 to form cyclic trisiloxane units proceeds more preferentially than intermolecular condensation.

Original languageEnglish
Pages (from-to)5362-5368
Number of pages7
JournalNew Journal of Chemistry
Volume38
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

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