Photoinduced synthesis of oligoesters


Kumbaraci V., Talinli N. , YAGCI Y.

MACROMOLECULES, vol.39, no.18, pp.6031-6035, 2006 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 18
  • Publication Date: 2006
  • Doi Number: 10.1021/ma0607721
  • Title of Journal : MACROMOLECULES
  • Page Numbers: pp.6031-6035

Abstract

For the first time, a true step-growth polymerization, i.e, polyesterification, was achieved by a photochemical means. Thus, heterobifunctional monomers, namely benzodioxinone and naphthodioxinone compounds possessing both chromophoric and aliphatic hydroxyl groups in the structure ( HDPD and HDNP, respectively), were synthesized by a ring closure and subsequent etherification processes and characterized. Photolysis of these compounds in CH2Cl2 at lambda(inc) = 300 nm yielded oligoesters with narrow molecular weight distribution. In the case of HDNP, photolysis can be performed at higher wavelengths, e. g., at lambda(inc) = 350 nm, because of the extended absorption introduced by the naphthalene ring. The structure of the photochemically formed oligoester was confirmed by FT-IR and H-1 NMR spectral measurements.