Covalently cross-linked multilayer thin films composed of diazoresin and brilliant yellow for an optical pH sensor

Yuya Egawa, Ryosuke Hayashida, Jun ichi Anzai

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The multilayered thin films composed diazoresin (DR) and brilliant yellow (BY) were fabricated by a layer-by-layer (LbL) deposition technique, and the ionic bonds between diazonium ion in DR and sulfonate residues in BY were converted to covalent bonds by UV light irradiation. The cross-linking between BY and DR prevented BY from desorption even in a pH 13 solution. The cross-linked (DR/BY)10DR film exhibited pH-dependent absorption spectra in pH 9-13, and the response was repeatable and quick. The pH response time of the films was within a few seconds upon change from pH 9.0 to 13.0, and ca. 40 s upon change from pH 13.0 to 9.0.

Original languageEnglish
Pages (from-to)1455-1458
Number of pages4
JournalPolymer
Volume48
Issue number6
DOIs
Publication statusPublished - 2007 Mar 8

Keywords

  • Diazoresin
  • Layer-by-layer
  • pH sensor

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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