Controlled morphology and spin transition characteristics in self-assembling, linear Fe(II) complexes

Nobuo Kimizuka, Hiroyuki Matsukizono, Shoko Kume, Keita Kuroiwa

研究成果: 会議への寄与タイプ学会誌査読

抄録

A novel family of lipophilic, photo-responsible supramolecular wires that contain 1D Fe(II) triazole complexes is developed. A triazole ligand 2 contains azobenzene group and it formed a 1D iron(II) complex Fe(2)3(BF 4)2, which is soluble in common organic solvents. Atomic force microscopy (AFM) of the sample in dilute chloroform solutions showed flexible molecular wires (length, 10 - 100 nm, width, ca. 7 nm). On the other hand, it formed aggregates and gave organogels when dispersed in chlorocyclohexane. The yellow chlorocyclohexane gel is liquefied by UV-irradiation and an orange-colored solution was obtained. This is ascribed to the trans-to-cis photoisomerization of azobenzene units, which is accompanied by morphological changes to undulated molecular wires. Visible-light illumination of the Fe(cw-2)3(BF4)2 complex reversibly afforded Fe(trans-2)3(BF4)2 complex, which is accompanied by physical gelation. Thus, the molecular wire of Fe(2) 3(BF4)2 show reversible conformational changes with maintaining the linear complex structures. This is the first example of photo-responsive 1D metal complexes which are dispersed in solution.

本文言語英語
ページ3067-3068
ページ数2
出版ステータス出版済み - 2006
イベント55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, 日本
継続期間: 9月 20 20069月 22 2006

その他

その他55th Society of Polymer Science Japan Symposium on Macromolecules
国/地域日本
CityToyama
Period9/20/069/22/06

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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