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

Nobuo Kimizuka, Hiroyuki Matsukizono, Shoko Kume, Keita Kuroiwa

Research output: Contribution to conferencePaper

Abstract

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.

Original languageEnglish
Pages3067-3068
Number of pages2
Publication statusPublished - Dec 1 2006
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: Sep 20 2006Sep 22 2006

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CountryJapan
CityToyama
Period9/20/069/22/06

Fingerprint

Wire
Azobenzene
Photoisomerization
Gelation
Chlorine compounds
Metal complexes
Organic solvents
Atomic force microscopy
Gels
Lighting
Ligands
Irradiation
Iron

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kimizuka, N., Matsukizono, H., Kume, S., & Kuroiwa, K. (2006). Controlled morphology and spin transition characteristics in self-assembling, linear Fe(II) complexes. 3067-3068. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.

Controlled morphology and spin transition characteristics in self-assembling, linear Fe(II) complexes. / Kimizuka, Nobuo; Matsukizono, Hiroyuki; Kume, Shoko; Kuroiwa, Keita.

2006. 3067-3068 Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.

Research output: Contribution to conferencePaper

Kimizuka, N, Matsukizono, H, Kume, S & Kuroiwa, K 2006, 'Controlled morphology and spin transition characteristics in self-assembling, linear Fe(II) complexes' Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan, 9/20/06 - 9/22/06, pp. 3067-3068.
Kimizuka N, Matsukizono H, Kume S, Kuroiwa K. Controlled morphology and spin transition characteristics in self-assembling, linear Fe(II) complexes. 2006. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.
Kimizuka, Nobuo ; Matsukizono, Hiroyuki ; Kume, Shoko ; Kuroiwa, Keita. / Controlled morphology and spin transition characteristics in self-assembling, linear Fe(II) complexes. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.2 p.
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