Dynamics of radical cations of poly(4-hydroxystyrene) in the presence and absence of triphenylsulfonium triflate as determined by pulse radiolysis of its highly concentrated solution

• Okamoto, Kazumasa

• Ishida, Takuya

• Yamamoto, Hiroki

• Kozawa, Takahiro

• Fujiyoshi, Ryoko

• Umegaki, Kikuo

Abstract

Pulse radiolysis of highly concentrated poly(4-hydroxystyrene) (PHS) solutions in cyclohexanone and p-dioxane was performed both with and without an onium-type photoacid generator (PAG). With increasing PHS concentration, the rate constant of deprotonation of PHS radical cations was found to decrease. In the presence of PAG, the yield of the multimer radical cation of PHS was shown to decrease. We found that pairing between the anions produced by the attachment of dissociative electrons of PAGs and the monomer PHS radical cations restrict local molecular motions, leading to the formation of the multimer PHS radical cations.

Journal

• Chemical physics letters

  Chemical physics letters 657 44-48, 2016-07-16

  Elsevier

Keywords

• Poly(4-hydroxystyrene)
• Deprotonation
• Pulse radiolysis
• Radiation chemistry
• Resist

Details

• CRID: 1050845763951791872
• NII Article ID: 120006488393
• DOI: 10.1016/j.cplett.2016.05.058
• HANDLE: 2115/70977
• ISSN: 00092614
• Web Site: https://api.elsevier.com/content/article/PII:S0009261416303682?httpAccept=text/plain
• Web Site: https://api.elsevier.com/content/article/PII:S0009261416303682?httpAccept=text/xml
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN