PH-induced interconversion between J-aggregates and H-aggregates of 5,10,15,20-Tetrakis(4-sulfonatophenyl)porphyrin in polyelectrolyte multilayer films

Yuya Egawa, Ryosuke Hayashida, Jun Ichi Anzai

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

We fabricated a layer-by-layer (LbL) film composed of 5,10,15,20- tetrakis(4-sulfonatophenyl)porphyrin (TPPS) and poly(allylamine) (PAA) and investigated its pH response by UV-visible spectrometry. When the (PAA/TPPS)5PAA film was immersed in a pH 1.5 solution, J-aggregate bands were observed at 484 and 691 nm. Above pH 3.0, the J-aggregates were completely dissociated and an H-aggregate band was observed at 405 nm. The interconversion between the J-aggregates and H-aggregates in the LbL film was repeatable and controllable by changing the pH of the solutions.

Original languageEnglish
Pages (from-to)13146-13150
Number of pages5
JournalLangmuir
Volume23
Issue number26
DOIs
Publication statusPublished - 2007 Dec 18

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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