Modification of aggregate formation in arachidic-acid-cyanine-dye complex Langmuir-Blodgett films by substituent groups

Kazuhiro Saito, Keiichi Ikegami, Shin Ichi Kuroda, Mitsuyoshi Saito, Yuka Tabe, Michio Sugi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Water-soluble cyanine dye derivatives can be adsorbed from aqueous solution to an arachidic acid monolayer at the air-water interface. Interface-adsorbed complex Langmuir-Blodgett films of arachidic acid and four different derivatives of thiacarbocyanine dyes were fabricated using this method, and their optical properties were examined employing a linearly polarized incident. Clear differences in both spectral shape and in-plane anisotropy were found among the films of different derivatives, each associated with an aggregate form characteristic of the substituent group. They can be classified as a dimer with Davydov splitting, a monomer, and a J aggregate. Estimation of the configuration of the molecules in the dimers and measurement of the photoluminescence spectrum for the J aggregate were performed to clarify the nature of aggregates. The results suggest the possibility of systematic control of aggregate formation in the system by introducing substituent groups for dyes.

Original languageEnglish
Pages (from-to)8291-8297
Number of pages7
JournalJournal of Applied Physics
Volume69
Issue number12
DOIs
Publication statusPublished - 1991 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Modification of aggregate formation in arachidic-acid-cyanine-dye complex Langmuir-Blodgett films by substituent groups'. Together they form a unique fingerprint.

  • Cite this