Self-organization of low-symmetry adjacent-type metallophthalocyanines having branched alkyl chains

Mutsumi Kimura, Hiroyuki Ueki, Kazuchika Ohta, Hirofusa Shirai, Nagao Kobayashi

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Low-symmetry, adjacent-type metallophthalocyanines 1 and 2 with four branched alkyl chains on one side and a chiral bridging segment on the other were synthesized, and their self-organization properties were investigated. The synthesized adjacent-type phthalocyanines were liquid-crystalline and exhibited a phase transition from the crystalline phase to the mesophase below room temperature. X-ray diffraction indicated that the molecules are stacked in one-dimensional columnar aggregates with a hexagonal arrangement. The self-organization behavior of zinc complex 1 and cobalt complex 2 was also investigated with a monolayer experiment at the air-water interface. The adjacent-type phthalocyanines formed a stable monolayer at the air-water interface, and the monolayers could be transferred onto quartz substrates by a Y-type deposition. UV-vis, XRD, and CD measurements for the resulting Langmuir-Blodgett films indicated that 1 and 2 had different molecular orientations.

Original languageEnglish
Pages (from-to)5051-5056
Number of pages6
JournalLangmuir
Volume22
Issue number11
DOIs
Publication statusPublished - 2006 May 23

ASJC Scopus subject areas

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

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