Synthesis of optically active polymers using P-chiral bisphosphines as anionic initiators

• Morisaki, Yasuhiro

• Saito, K.

• Imoto, H.

• Suzuki, K.

• Ouchi, Y.

• Chujo, Yoshiki

Abstract

Anionic polymerization of triphenylmethyl methacrylate was performed by using P-chiral bisphosphine initiators. According to the optical rotation analysis and circular dichroism measurements, the polymer obtained by using the initiator (S, S)-1, 2-bis(boranato(tert-butyl)methylphosphino) ethane exhibited one-handed helical conformation induced by the chirality of phosphorus atoms in the polymer terminal. The enantiomer (R, R)-1, 2-bis(boranato(tert-butyl)methylphosphino) ethane gave the opposite one-handed helical polymer. Optically active bisphosphine (S, S)-1, 2-bis(boranatomethylphenylphosphino) ethane was employed for the helix-sense-selective polymerization of triphenylmethyl methacrylate in order to obtain the polymer with the same helix sense as the polymer obtained from the initiator (S, S)-1, 2-ethane bis(t-butylm-ethylphosphineborane). Further, removal of the coordinated boranes and complexation with platinum(II) on the chiral phosphorus atoms were carried out in order to yield the corresponding polymer-platinum(II) complex without loss of its chiral higher-ordered structure.

Journal

• Polymer Science Series A

  Polymer Science Series A 51 (11-12), 1218-1228, 2009-12

  Springer Verlag

Details

• CRID: 1050001202063480704
• NII Article ID: 120001850623
• ISSN: 0965545X
• HANDLE: 2433/93013
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles
  • KAKEN