Aggregates in Langmuir-Blodgett Films of Spiropyrans Having Hydroxyl or Hydroxymethyl Group.

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概要

• 論文の詳細を見る

• The optical properties of monomolecular layers at an air–water interface and also of Langmuir–Blodgett (LB) films of several photochromic spiropyrans with a single hydrophobic long chain and either a hydroxyl or a hydroxymethyl group have been investigated. Changes in the optical spectra of these films were induced by either UV irradiation or heating. UV-visible, and IR absorption spectra showed that spiropyran SP145 formed J-aggregates and SP147 formed H-aggregates. The half-decay period of the J-aggregate to the spiropyran (SP) form was longer than that of the colored monomeric photomerocyanine (PMC) to the SP form. It was concluded that hydrogen bonding between neighboring colored PMC molecules via hydroxyl, hydroxymethyl, and nitro groups stabilizes the aggregate state.

• 公益社団法人 日本化学会の論文

著者

• Higashigaki Yoshiyuki

  Tokyo Research Laboratories, Sharp Corporation

• Miyata Akio

  Tokyo Research Laboratories, Sharp Corporation

• Unuma Yutaka

  Tokyo Research Laboratories, Sharp Corporation

関連論文

• Aggregates in Langmuir-Blodgett Films of Spiropyrans Having Hydroxyl or Hydroxymethyl Group.
• H-Aggregate of a Long-Chain Crystal Violet Dye in Langmuir-Blodgett Films.

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