Organogels of 8-quinolinol/metal(II)-chelate derivatives that show electron- and light-emitting properties

Michihiro Shirakawa, Norifumi Fujita, Takahiro Tani, Kenji Kaneko, Masayoshi Ojima, Akihiko Fujii, Masanori Ozaki, Seiji Shinkai

研究成果: Contribution to journalArticle査読

74 被引用数 (Scopus)

抄録

8-Quinolinol/copper(II)-, palladium(II)-, and platinum(II)-chelate-based organogelators (IM) and their nongelling reference compounds (2M) were synthesized. Complexes IM could gelate various organic solvents at very low concentrations. Electron microscope measurements gave visual images of well-developed fibrous structures characteristic of low-molecular-weight organogels. UV/Vis and FTIR spectroscopy revealed that the good gelation ability of IM arises from the π-π interactions of the chelate moieties and the hydrogen-bond interactions among the amide groups. Very interestingly, field emission performances of the nanofibers prepared from the IM gels are evidently different depending on the electronic states of the three kinds of central metals. In addition, the 1Pt gel shows unique thermo- and solvatochromism of visible and phosphorescent color in response to a sol-gel phase transition. Furthermore, the 1Pt gel possesses an attractive ability to inhibit dioxygen quenching of excited triplet states, which increases the phosphorescence quantum yield of this gel. This effect is attributed to the isolation effect of the phosphorescent chelate moiety from the dioxygen-containing solution phase.

本文言語英語
ページ(範囲)4155-4162
ページ数8
ジャーナルChemistry - A European Journal
13
15
DOI
出版ステータス出版済み - 6 21 2007

All Science Journal Classification (ASJC) codes

  • 触媒
  • 有機化学

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